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Old 02-11-2010, 02:27 PM
shorttough shorttough is offline
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Location: Dallas
 
Join Date: Apr 2009
Posts: 12
Mein Auto: 545i
I've been experiencing this Surging problem since the last 5000 miles on and off. Like I'd be be cruising between 35-40mph one day and seemed like it got corrected itself the next, again problem would re-appear. Initially, i thought it was the gas I was putting in my car, thus i changed my preferred Gas Station thinking that the ethanol level might be too high than 10%, thinking it would help, but it reappeared later on. And during cold temperature, the Problem seem to just Disappear!!!

I've been researching a lot, some say its the mechatronics, others say the Vanos Unit got a rubber seal and replacing the rubber seals would help. Then, there is a website that explains exactly what's happening to my car: http://www.beisansystems.com/index.html but its for the 6 cylinder cars. I'm out of warranty at 63k miles, I'm thinking of going to the parts dealer for the ZF parts: http://www.tsgparts.net/index.php?p=...=176&parent=50 and have a local independent guy replace it for me. With the trade-in value of my 2005 545i, i wonder if i'm making a good decision fixing it
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