2007-2010 BMW X5 SUV Service & Repair Manual

2007-2013 BMW X5 35D E70 SERVICE AND REPAIR MANUAL

ENGINE PERFORMANCE Air Intake and Exhaust Systems - Diesel AIR INTAKE AND EXHAUST SYSTEMS The M57D30T2 US engine exhibits the following special features in the air intake and exhaust system:  Electric swirl flaps  Electric exhaust gas recirculation valve (High pressure EGR valve)  Low pressure EGR (E70 only)  Turbo assembly adapted for low pressure EGR. (E70 only) Fig. 1: Air Intake And Exhaust - System Diagram 2009 BMW X5 35d ENGINE PERFORMANCE Air Intake and Exhaust Systems - Diesel 2009 BMW X5 35d ENGINE PERFORMANCE Air Intake and Exhaust Systems - Diesel

Courtesy of BMW OF NORTH AMERICA, INC. INDEX EXPLANATION CHART AIR INTAKE SYSTEMS The intake air ductwork differs between the E70 and E90. Both vehicles will draw air from behind the kidney grill. On the E70, the air filter housing and silencer is located on top of the engine. On the other hand, the E90 has a filter housing on the passenger side inner fender. Index Explanation 1 Diesel engine - M57D30T2 2 Intake silencer (air filter) 3 HFM 4 Compressor bypass valve 5 Turbocharger - low pressure stage 6 Turbocharger - high pressure stage 7 Bypass valve for High Pressure EGR cooler 8 High-pressure EGR cooler 9 Temperature sensor for high-pressure EGR 10 High-pressure EGR valve 11 Throttle valve 12 Charge air temperature sensor 13 Intercooler 14 Low pressure EGR valve with position sensor 15 Temperature sensor for low pressure EGR 16 Low pressure EGR cooler 17 Exhaust gas temperature sensor - post catalyst (DOC) 18 Oxidation catalyst and Diesel particle filter (DOC/DPF) 19 Exhaust gas temperature sensor - pre catalyst (DOC) 20 Oxygen sensor 21 Wastegate valve 22 Turbine control valve 23 Exhaust pressure sensor (after exhaust manifold) 24 Swirl port actuator 25 Boost pressure sensor 26 Exhaust differential pressure sensor 27 NO x sensor - pre SCR catalyst 28 Temperature sensor - post DPF 29 Dosing (metering) module (for SCR system) 30 Mixer (for SCR system) 31 SCR Catalyst 32 NO x sensor - post SCR catalyst 33 DDE 7.3 34 Muffler (silencer) 2009 BMW X5 35d ENGINE PERFORMANCE Air Intake and Exhaust Systems - Diesel

Fig. 2: Identifying Air Intake System Components Courtesy of BMW OF NORTH AMERICA, INC. INDEX EXPLANATION CHART Swirl Flaps The US version of the M57 engine utilizes the previously known swirl flaps which are located in the intake manifold. The primary difference is that the swirl flaps are now controlled electrically, rather than with vacuum. This method of actuation also provides a means of position feedback with the DDE system to comply with OBD requirements. An additional benefit of this method of control is a more precise positioning of the swirl flaps as needed. The flaps are map controlled using engine speed, engine load and coolant temperature. Index Explanation A Air intake system - E70 B Air intake system - E90 1 Intake air point of entry 2 Unfiltered air intake 3 Air filter housing 4 HFM 5 Fresh (filtered) air intake pipe 6 Blow-by tube 2009 BMW X5 35d ENGINE PERFORMANCE Air Intake and Exhaust Systems - Diesel

Fig. 3: Swirl Flaps Flow Diagram Courtesy of BMW OF NORTH AMERICA, INC. INDEX EXPLANATION CHART EXHAUST SYSTEM The exhaust systems for both the E90 and E70 have been adapted for the US market. There are special provisions for the SCR system as well as for the US specific OBD monitoring of the DOC. Each system is unique to the vehicle with different muffler and tailpipe features. Index Explanation 1 Control rod for swirl flaps 2 Throttle plate mounting 3 Intake manifold 4 Electric motor (for swirl flaps) 5 Swirl ports 6 Tangential ports 7 Swirl flaps 2009 BMW X5 35d ENGINE PERFORMANCE Air Intake and Exhaust Systems - Diesel

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2007-2010 BMW X5 SUV Service & Repair Manual

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