Thread: 91k for a 550?
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Old 11-18-2012, 10:17 AM
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Needsdecaf Needsdecaf is offline
Everything's Bigger in TX
Location: The Woodlands, TX
Join Date: Sep 2006
Posts: 7,121
Mein Auto: 2007 MDX
Originally Posted by Alpine300ZHP View Post
I understand. My N54's all had a ton of issues. It was the faster motor (because of the two small turbos), but it was also the more problematic motor. The N55 is much more reliable from what I can see. This is part of why I traded the 08 535i for the 11. The 08 had quite a few issues and I was getting tired of dealing with it.
Yeah, I remember Car magazine having to replace a turbo on their long term tester. And then the zillions of HPFP issues. Well, I just didn't want to do the brain damage.

The N54 is definitely the stronger motor. However, one reason I believe most people think it FEELS stronger is the transmission. Think that the N54 had the 6 speed auto and the N55 is paired with the 8 speeder. The 8 speeder shifts more often and keeps the revs a lot lower than the N54. As a result, the N55 spends a lot of time below 2,000 RPM, and most people think it feels weaker.

Compared to the 6 speed auto, the N54 actually gets a chance to stretch it's legs.
2011 535i
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