hello everyone,
I was wondering what the difficulty would be in swapping a 535i engine into a 525i 1992 I believe the manual transmission will be the same. Probably have to get new ecu and mounts but apart from that is there much to this swap? the other possibility would be an M52 swap.... but i'd expect the m30 would be more reliable, simplier to swap and more economical (don't have to run premium unleaded).