Answer
Feb 14, 2022 - 12:23 AM
Unfortunately, I would highly doubt it...
The 1986 BMW 528e came with a 2.7L M20 engine while the 1988 BMW 535i was offered with a 3.4L M30 engine. While both engines are quite similar and may fit relatively bolt-on, they are both equipped with different sensors, modules, actuators, etc. It's very unlikely that the 535i's wiring harness could be modified to fit the M30 engine.
As a general rule, when swapping a different engine than what was originally installed, the safest bet is to use the donor car's wiring harness, ECU, and all, and install everything on the receiver car instead.
The 1986 BMW 528e came with a 2.7L M20 engine while the 1988 BMW 535i was offered with a 3.4L M30 engine. While both engines are quite similar and may fit relatively bolt-on, they are both equipped with different sensors, modules, actuators, etc. It's very unlikely that the 535i's wiring harness could be modified to fit the M30 engine.
As a general rule, when swapping a different engine than what was originally installed, the safest bet is to use the donor car's wiring harness, ECU, and all, and install everything on the receiver car instead.
