Quote:
Originally Posted by lamboworld
I have owned an S54 powered E46M3 in the past and it was a nightmare. I believe that most people don't experience the problems that I had but BMW spent about 18k in CPO warranty work on that car. Since then I have owned Stage 2 tuned N54 cars with no problems. IMO the N54 is much more reliable, much faster in a straight line and would be faster around the track with some suspension work. It also requires less service than the S54. If you don't know the S54 requires regular valve adjustments which cost about $500. The only downfall is that the E89 doesn't have an LSD's but this is only a problem is you are going to track the car a lot.
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Curious what year was your M3?
I had a 335i and it was great, but it didn't have the LSD either, which I hated.
Yes, I knew about the valve adjustments, I have a great local shop that quoted me $600.