2008 Audi A4 (B7) Service & Repair Manual
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Workshop Manual
Audi A4 2008 ➤
Audi A5 Cabriolet 2009 ➤
Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve
TFSI - generation III)
Engine ID
CJEB
CNC
D
CUH
A
CUJA CJED
CNC
E
CJEE
Edition 08.2016
Service
Service Department. Technical Information
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
List of Workshop Manual Repair Groups
Repair Group
00 - Technical data
10 - Removing and installing engine
13 - Crankshaft group
15 - Cylinder head, valve gear
17 - Lubrication
19 - Cooling
21 - Turbocharging/supercharging
24 - Mixture preparation - injection
26 - Exhaust system
28 - Ignition system
Technical information should always be available to the foremen and mechanics, because their
careful and constant adherence to the instructions is essential to ensure vehicle road-worthiness and
safety. In addition, the normal basic safety precautions for working on motor vehicles must, as a
matter of course, be observed.
Service
All rights reserved.
No reproduction without prior agreement from publisher.
Copyright © 2016 Audi AG, Ingolstadt D3E80428DD0
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Contents
00 - Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Engine identification number/engine data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Safety precautions when working on the fuel supply system . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Safety precautions when working on vehicles with start/stop system . . . . . . . . . . . . . . . . 2
2.3 Safety precautions when using testers and measuring instruments during a road test . . . . 3
2.4 Safety precautions when working on the subframe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.5 Safety precautions when working on the ignition system . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.6 Safety precautions when working on the cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Repair instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Rules for cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Foreign particles in engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4 Routing and attachment of pipes, hoses and wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.5 Installing radiators and condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.6 Checking vacuum system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
10 - Removing and installing engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1 Removing and installing engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.1 Removing engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 Securing engine to engine and gearbox support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
1.3 Installing engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2 Assembly mountings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.1 Exploded view - assembly mountings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.2 Removing and installing engine mountings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3 Engine cover panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.1 Removing and installing engine cover panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
13 - Crankshaft group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
1 Cylinder block (pulley end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
1.1 Exploded view - cylinder block (pulley end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
1.2 Removing and installing poly V-belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
1.3 Removing and installing tensioner for poly V-belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
1.4 Removing and installing vibration damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
1.5 Removing and installing bracket for ancillaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2 Cylinder block (gearbox end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2.1 Exploded view - cylinder block (gearbox end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2.2 Removing and installing drive plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
2.3 Removing and installing sealing flange (gearbox end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
2.4 Renewing needle bearing in drive plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3 Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3.1 Exploded view - crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3.2 Crankshaft dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3.3 Allocation of main bearing shells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.4 Measuring axial clearance of crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.5 Measuring radial clearance of crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.6 Removing and installing sender wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4 Balance shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.1 Exploded view - balance shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.2 Removing and installing balance shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.3 Renewing oil seal for balance shaft (inlet side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
Contents i
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
5 Pistons and conrods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
5.1 Exploded view - pistons and conrods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
5.2 Removing and installing pistons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
5.3 Checking pistons and cylinder bores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
5.4 Separating parts of new conrod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
5.5 Checking radial clearance of conrod bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
15 - Cylinder head, valve gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
1 Timing chain cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
1.1 Exploded view - timing chain cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
1.2 Removing and installing camshaft control valve 1 N205 and exhaust camshaft control valve
1 N318 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
1.3 Removing and installing timing chain cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
1.4 Renewing oil seal for vibration damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
2 Chain drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
2.1 Exploded view - camshaft timing chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
2.2 Exploded view - drive chain for balance shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
2.3 Removing and installing bearing saddle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
2.4 Removing and installing camshaft timing chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
2.5 Checking chain elongation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
2.6 Checking valve timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
3 Cylinder head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
3.1 Exploded view - cylinder head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
3.2 Removing and installing cylinder head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
3.3 Checking compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
4 Valve gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
4.1 Exploded view - valve gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
4.2 Removing and installing camshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
4.3 Installing ball for slider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
4.4 Removing and installing actuators for camshaft adjustment . . . . . . . . . . . . . . . . . . . . . . . . 152
4.5 Removing and installing valve stem oil seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
5 Inlet and exhaust valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
5.1 Checking valve guides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
5.2 Valve dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
17 - Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
1 Sump/oil pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
1.1 Exploded view - sump/oil pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
1.2 Removing and installing oil level and oil temperature sender G266 . . . . . . . . . . . . . . . . . . 168
1.3 Removing and installing sump (bottom section) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
1.4 Removing and installing oil pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
1.5 Removing and installing sump (top section) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
1.6 Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
2 Engine oil cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
2.1 Exploded view - engine oil cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
2.2 Removing and installing engine oil cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
2.3 Removing and installing mechanical switching valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
3 Crankcase breather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
3.1 Exploded view - crankcase breather system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
3.2 Removing and installing oil separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
4 Oil filter/oil pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
4.1 Exploded view - oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
4.2 Exploded view - oil pressure switches/oil pressure control . . . . . . . . . . . . . . . . . . . . . . . . 183
4.3 Removing and installing piston cooling jet control valve N522 . . . . . . . . . . . . . . . . . . . . . . 184
4.4 Removing and installing valve for oil pressure control N428 . . . . . . . . . . . . . . . . . . . . . . . . 184
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
ii Contents
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
4.5 Removing and installing oil pressure switch F22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
4.6 Removing and installing oil pressure switch for reduced oil pressure F378 . . . . . . . . . . . . 187
4.7 Removing and installing stage 3 oil pressure switch F447 . . . . . . . . . . . . . . . . . . . . . . . . 187
4.8 Checking oil pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
4.9 Checking oil pressure and oil pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
19 - Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
1 Cooling system/coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
1.1 Connection diagram - coolant hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
1.2 Checking cooling system for leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
1.3 Draining and filling cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
2 Coolant pump/thermostat assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
2.1 Exploded view - coolant pump/thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
2.2 Exploded view - coolant temperature senders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
2.3 Removing and installing coolant pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
2.4 Removing and installing toothed belt for coolant pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
2.5 Removing and installing actuator for engine temperature regulation N493 . . . . . . . . . . . . 207
2.6 Removing and installing coolant temperature sender G62 . . . . . . . . . . . . . . . . . . . . . . . . 209
2.7 Removing and installing radiator outlet coolant temperature sender G83 . . . . . . . . . . . . 210
3 Coolant pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
3.1 Exploded view - coolant pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
3.2 Removing and installing coolant pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
4 Radiator/radiator fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
4.1 Exploded view - radiator/radiator fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
4.2 Removing and installing radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
4.3 Removing and installing radiator cowl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
4.4 Removing and installing radiator fan control unit J293 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
4.5 Removing and installing radiator fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
21 - Turbocharging/supercharging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
1 Turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
1.1 Exploded view - turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
1.2 Removing and installing turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
2 Charge air system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
2.1 Exploded view - charge air system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
2.2 Removing and installing charge air cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
2.3 Removing and installing charge pressure sender G31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
2.4 Checking charge air system for leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
24 - Mixture preparation - injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
1 Injection system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
1.1 Overview of fitting locations - injection system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
2 Air cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
2.1 Exploded view - air cleaner housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
2.2 Removing and installing air cleaner housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
3 Intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
3.1 Exploded view - intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
3.2 Removing and installing intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
3.3 Removing and installing throttle valve module J338 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
3.4 Cleaning throttle valve module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
3.5 Checking intake manifold change-over function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
4 Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
4.1 Exploded view - fuel rail with injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
4.2 Removing and installing fuel rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
4.3 Removing and installing injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
Contents iii
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
4.4 Cleaning injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
5 Senders and sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
5.1 Removing and installing fuel pressure sender G247 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
5.2 Checking fuel pressure sender G247 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
5.3 Removing and installing fuel pressure sender for low pressure G410 . . . . . . . . . . . . . . . . 279
5.4 Removing and installing intake air temperature sender G42 / intake manifold pressure sender
G71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
6 High-pressure pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
6.1 Exploded view - high-pressure pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
6.2 Removing and installing high-pressure pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
7 Lambda probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
7.1 Exploded view - Lambda probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
7.2 Removing and installing Lambda probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
8 Engine control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
8.1 Removing and installing engine control unit J623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
26 - Exhaust system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
1 Exhaust pipes/silencers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
1.1 Exploded view - silencers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
1.2 Separating exhaust pipes/silencers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
1.3 Removing and installing front silencers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
1.4 Renewing tailpipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
1.5 Stress-free alignment of exhaust system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
1.6 Checking exhaust system for leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
2 Emission control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
2.1 Exploded view - emission control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
2.2 Removing and installing catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
28 - Ignition system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
1 Ignition system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
1.1 Exploded view - ignition system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
1.2 Removing and installing ignition coils with output stages . . . . . . . . . . . . . . . . . . . . . . . . . . 306
1.3 Removing and installing knock sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
1.4 Removing and installing Hall senders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
1.5 Removing and installing engine speed sender G28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
iv Contents
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
00 – Technical data
1 Identification
(ARL004867; Edition 08.2016)
⇒ “1.1 Engine identification number/engine data”, page 1
1.1 Engine identification number/engine da‐
ta
Engine number
The engine number (“engine code” and “serial number”) can be
found at the front of the joint between engine and gearbox.
There is also a sticker with “engine code” and “serial number”
attached to the toothed belt cover.
In addition, the engine code is listed on the vehicle data stickers.
Engine data
⇒ Technical data for petrol engines; Rep. gr. 00 ; Overview of
engines
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
1. Identification 1
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
2 Safety precautions
⇒ “2.1 Safety precautions when working on the fuel supply sys‐
tem”, page 2
⇒ “2.2 Safety precautions when working on vehicles with start/
stop system”, page 2
⇒ “2.3 Safety precautions when using testers and measuring in‐
struments during a road test”, page 3
⇒ “2.4 Safety precautions when working on the subframe”,
page 3
⇒ “2.5 Safety precautions when working on the ignition system”,
page 3
⇒ “2.6 Safety precautions when working on the cooling system”,
page 4
2.1 Safety precautions when working on the fuel supply system
Risk of injury - fuel system operates under high pressure
The fuel system is pressurised. There is a risk of injury as fuel
may spray out.
Before opening the fuel system:
– Put on safety goggles.
– Put on protective gloves.
– Release pressure (wrap clean cloth around connection and
open connection carefully).
Risk of fire due to escaping fuel
If the battery is connected, the door contact switch activates the
fuel pump when the driver's door is opened. Escaping fuel may
ignite, causing a fire.
– Before opening the fuel system, disconnect power supply to
fuel pump.
2.2 Safety precautions when working on vehicles with start/stop system
Risk of injury - engine may start unexpectedly
On vehicles with the start/stop system activated, the engine may
start unexpectedly. A message in the instrument cluster indicates
whether the start/stop system is activated.
– Deactivate start/stop system by switching off ignition.
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
2 Rep. gr.00 - Technical data
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
2.3 Safety precautions when using testers and measuring instruments during
a road test
Risk of injury if test equipment is not secured
If an accident occurs and the front passenger's airbag is triggered,
test equipment which is not secured adequately may be catapul‐
ted through the vehicle with potentially serious consequences.
– Secure test equipment on the rear seat with a strap.
Or
– Have a second mechanic operate test equipment on the rear
seat.
2.4 Safety precautions when working on the
subframe
Please note the following warnings when working on the sub‐
frame:
Caution
Risk of damage to running gear components.
♦ The vehicle must NOT be lowered onto its wheels if the
engine/gearbox mountings, steering rack or subframe
cross brace are not properly installed.
♦ The vehicle must NOT be supported by applying a trolley
jack or similar to the subframe or subframe cross brace.
2.5 Safety precautions when working on the ignition system
Risk of injury due to electric shock
When the engine is running, there are high voltage levels in the
ignition system. There is a risk of electric shock when touching
the ignition system!
– Never touch or disconnect ignition wiring when the engine is
running or being turned at cranking speed.
Risk of damage to components
Washing the engine or connecting/disconnecting electrical wiring
may result in components being damaged if the engine is running.
– Switch off ignition before connecting/disconnecting electrical
wiring.
– Switch off ignition before cleaning engine.
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
2. Safety precautions 3
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
2.6 Safety precautions when working on the cooling system
Risk of scalding as hot coolant can escape
The cooling system is under pressure when the engine is hot. Hot
steam/hot coolant can escape - risk of scalding.
– Put on protective gloves.
– Put on safety goggles.
– Release pressure (cover filler cap on coolant expansion tank
with a cloth and open carefully).
Audi A4 2008 ➤ , Audi A5 Cabriolet 2009 ➤ , Audi A5 Coupé 2008 ➤
4-cylinder direct injection engine (1.8, 2.0 ltr. 4-valve TFSI - generation III) - Edition 08.2016
4 Rep. gr.00 - Technical data
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Introducing the 2008 Audi A4 (B7) Service & Repair Manual.
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- 2008 Audi A4 (B7) Avant
- 2008 Audi A4 (B7) Cabriolet
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