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changing from m54 b22 to m54 b25

3K views 3 replies 3 participants last post by  slugger1990 
#1 ·
few questions folks , if i change the 2.2 in my 320 ci to the 2.5 do i need to change much else apart from the engine , ie can i use the original ecu and remap it to suit the new engine , is there chips and transponders that need to be changed for the immobiliser ? iv converted a few cars before but unfortunately none of them were bmw so doing this on my car is new to me
any help appreciated
 
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