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This is a very dumb question, is there a difference between the 95 B6 and the 96 B6? I'm swapping the 96 into my car because I blew my engine and found this one in a wrecked car. My mechanic is telling me the engine is different and now he wants to charge me more because he tells me the harness is different. Ex: the crank sensor on the 96.
Can anyone clear this up for me? I was under the impression that these engines were exactly the same!!

Thanks!
Bryan

The engines are "similar" - there are a few extra sensors on the 96 - the 96 model is obd2 and the previous models are either partial pbd2 or some other proprietary standard. If you just transplant the engine and use your existing wiring harness - it will work (you will have some extra sensors - you can leave them unconnected). If you want to transplant the engine wiring harness as well - it will be a nightmare.

^ agree

another question, are the 94 and 95 4 cylinder engines the same?

Yes, Its just when you get to 96 is when it starts to get all funky.

ive heard some cars in 95 and 96 were actually had both on board systems in the car like obd1 and obd2. did mazda do this? just curious if the 96 models did that?