Can I swap a 1987 535 is engine into my 1991 325 i convertible

Asked by Jim Apr 20, 2020 at 11:20 AM about the 1987 BMW 5 Series 535is Sedan RWD

Question type: Car Customization

I have a 1991 325 i convertible and I just bought a 1987 535 is with a spare
motor.  can I fit that spare 535 is engine in my 325is

1 Answer


Adaptation isn't what it used to be. With today's computers and sensors, if you have the same model year and the same basic platform, the engines would have been manufactured the same. All components, including electrical and engine control would be the same. Accessories might differ, but you would be keeping those that came with the receiving car: air conditioning, cruise control, etc. Replacing an engine with one from a different year or a different platform would entail some modifications or wire harness supplements to work. The question isn't an easy one to answer other than the obvious "Liberty" is likely the only easy replacement car. Researching other cars for computability would be a nightmare.

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