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03-03-2010 12:03 AM #1
Vibration through the seat and gas pedal.
I have had enough with the same issue and the dealer keeps on telling me it's always something else.
I have a 2006 x5 4.8is with 39k miles. Between 60-75mph the whole seat and gas pedal vibrate. The steering wheel does not vibrate at all. First they told me it was my tires. I bought all 4 tires, then it was my wheels. I requested to try different wheels and the problem persisted with the other set of wheels. Another issue was alignment. I paid for an alignment and the problem is still there. I have two other BMW's and have had BMW's for the last 12 years. This is very frustrating and I am receiving no help. What do you guys suggest I do?
03-03-2010 11:28 AM #2
03-03-2010 05:27 PM #3
03-05-2010 12:40 PM #4
Re: Vibration through the seat and gas pedal.
I mention those as two items to check.
The guibo, or flex joint, is at the output of the transmission
Unlike American cars, which had two u-joints and a single shaft, most European makes have a rubber flex coupler at the output of the transmission, a first driveshaft half then a center bearing at the mid point of the car (mounted on a rubber flex mounting) then a second driveshaft half going to the differential.
BMW, Mercedes, etc. all use a similar system. It provides a smoother power transfer and better isolation from drivetrain vibration. It is not designed to take a lot of instanteous torque, which is why a lot of kids have problems with BMWs when they mistake them for Mustangs and do burnouts and such.
The center bearing is between the two driveshaft halves and on most BMWs is usually obscured by the exhaust system.
These could be sources of vibration, particularly at the center of the car and are easy for a mechanic to check. With your low mileage, though, it would be odd that either would fail.
If you have an automatic transmission, that might be another issue as well. A failing automatic can cause vibrations at odd speeds.
Just some ideas. No conclusions.
03-24-2010 09:32 PM #5
03-25-2010 09:52 AM #6
Still under warranty?
If it is still under warranty, I'd make sure to document everything and also get them to acknowledge there is a problem. I'd escalate the warranty claim up the chain, to the zone manager or BMW NA.
If it fails right out of warranty, you want to have documentation. Do you have extended warranty on the car?
Is it an automatic? Maybe something in there is getting ready to let loose. See www.noreverse.org
They tried balancing the tires, rotating the tires, checking the ball joints, tie rods, alignment, flex disc (guibio) center bearing, and all the other usual suspects, correct? Engine mounts are OK?
BTW, how old are the tires? - they probably have been replaced by now. Sometimes tire belts can shift (particularly on off brands) causing odd vibration problems that are hard to diagnose. Rotating the tires can help diagnose this, if the vibration moves around the car with the tires. These are frustrating problems to diagnose, as they often are masked by other problems.
I could understand this happening to my much beaten and abused 2002 model. Older cars rattle and vibrate, that's part and parcel of the deal. But a 2006? Seems odd.
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