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2008 BMW 5-Series 528i 4dr Sedan RWD

2008 BMW 5-Series
Trim Info:
Rear Wheel Drive, 4 Door Sedan, Mid-Size
17 mpg city / 27 mpg hwy
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July 10, 2014, 11:04 am

Benjamin T

Question: Grind/Rattle/Power Loss

2008 BMW 550i

Hey guys, not sure if I have one or multiple issues...

The car is doing the following:

Loud metal on metal grind noise that I can't pinpoint that sounds like it's coming from an accessory, but really not sure. Rattle/grind at idle. Goes completely away at a higher RPM. Car shifts fine. Car runs fine... with one exception:

If I pull up to a red light and sit for about 15-20 seconds, then try to go, I have a dead throttle. RPMs go up, but no movement/power. At about 3k it kicks in, and the car drives completely normally. No noise/no power loss. If I slow down to turn at a red light, for example, where I'm stopping briefly but not waiting, I get zero power loss.

Any clue? Anyone experienced this? No alarms, no check engines, no performance/drive issues other than the power loss. Just at a loss here.

July 13, 2014, 10:22 pm

Richard W
Expert Mechanic

I think the noise has to do with your problem. I would take it to a shop to pinpoint the noise.

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