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      08-12-2012, 06:12 PM   #124
gtrek79
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Drives: 2011 Z4 3.5i
Join Date: Jul 2011
Location: Greenville, SC

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Quote:
Originally Posted by Roadstergal View Post
Yes, you are correct. Since I have had mine replaced, I have never let the gas tank get below 1/4 and most of the time fill it back up when it is 1/2 or slightly below. I cannot recall where I got the info that this may have been the cause. I have had the high pressure and low pressure replaced. The high pitched whining sound coming from the rear is the LPFP. I never experienced any problems with the HPFP, but they replaced it because of the recall.
Funny, mine only made the noise between full and 1/2 tank. It was perfectly quiet below 1/2 tank so I hated to refill the tank.
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