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Hello Bimmerfest,

I have a BMW e46, year 2002, engine n42. I think that my engine is dead because when I start the car the engine doesn't start and the rpm is below 200 also the compression ratio is between 8 and 7 bars for each cylinder. So I decide to change it with M52 as it is more powerful (6 cylinders). I'm wondering if they are compatible and do I need to change the electronic box?
 
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