2002 BMW X5 BMW cannot diagnos vibration problem

The vibration is NOT primarily felt in the steering wheel, but there is SOME vibration felt on the steering wheel.

They have already swapped all of the tires, wheels and apparently axles with another vehicle. And rotors I believe it was.

Vibration continued.

Dealership called today and are going to try new hubs. Differential is next. We are on "pay as you go"
now.

It didnt creep up - we had just driven 1900 miles in four days the month previous.

Vehicle was taken in for a water pump replacement where it was noticed vehicle needed new brake pads - they were replaced (he showed us the old ones). Vehicle was driven around town for one week (not up to the speed where the vibration starts (always at the exact same speed - 108 km per hour).

The first time out on the highway after brake work the vibration started -it is bad enough we pulled over to the side assuming a tire was coming off (or some such thing). Checked and found a slightly low tire. Went to destination and four hours later came out to the vehicle to a very soft tire. Put in 50 lbs pressure and drove to tire store where tire was repaired and balanced.

Took out on highway and vibration was still there. Took to BMW dealership two and a half hours away and it has been in there every since with all of the items listed above having been tried to see if would eliminate the vibration.

Nothing new yet this week. Checked Friday and parts were in to install new hubs. Thank you for your interest. We (as well as the bmw dealership) are at our wits end.

January 20, 2009 I will check at BMW dealership where the car is still residing and see if the driveshaft has been checked for balance - and the center bearing

Since January 9 they have been waiting for various parts to install new "hubs" - nuts that have been stripped are being "overnighted" from California.

Thank you for the continued interest. The vehicle has been in the service department since December 1/08 - and we have had to rent a car the entire time.

BMW North America assures us that the "best of the best" have been looking after our vehicle.

We should hear more soon from the dealership.

Thank you for checking. The X5 has been at another BMW dealership (Phoenix area now) for close to a week and they have concluded that for the first time in 26 years in the business that they do not have any idea what is causing the vibration. They are going to check a few more things (at OUR EXPENSE NOW). We will only leave it another day or two as the car rental costs have been astronomical and we are no further ahead than when the car first went in for repair December 1, 2008.

Hoover3, You are living a nightmare! Don't blame the vehicle although they have had there share of problems. First, I believe these gentlemen are heading in the right direction. For a BMW dealership after rechecking the work they previously performed, the wheels and tires would be the next obvious check. The driveshaft is what all BMW technicians would look at second. The reason, there is not an experienced tech. Out there that has not gone through this. Typically the driveshaft vibration is felt in two ways, a harsh shake on hard acceleration, and or a vibration that starts to be noticable in the seat of the pants at approx. 45 mph and up. However, sometimes just a look is not good enough, you CANNOT always tell with just a look if a counterweight is missing, and the centerbearings are most difficult to determine failure. Unfortunately the best diagnosis for the driveshaft problem is to actually bolt a different one in place and the tech. Should follow the proper repair instructions on the center bearing mount preload as BMW specifies, along with proper angle at each end of the shaft and that it is aligned straight in the vehicle. Since I am not aware of any vehicle modifications, I assume a stock vehicle. There has been very little success with rebuilding these shafts, (replacing the center bearing) unless it is a specialty shop for shafts. Have the dealer replace or try one from a known good vehicle.
Now I should of asked if the vibration is only at 65mph ( starts and ends) can you drive through it up to say 70 and then have no vibration.
Before the previous work you had a water pump installed, correct? Do your self a favor and open the hood and look at the radiator fan with the engine OFF and rotate the fan by hand. Is there a fan blade missing, if so that is the culprit, causing a drivetrain vibration. Of course by now all of these things have been checked including all drivetrain mounts, is there any other previous work (bodyshop, or alignment)work done? I have lots of questions? Will keep watching post

A missing fan blade would act up sitting still reving the motor and be apparent EVERY time it went thru that rpm.

You say it starts at 65 mph and but you have no further info on the vibration,
does it get worse if you go faster,
does it get a litte better,
does it stay the same
does it have any change if you let off the gas,
If you throw it into nuetral
if you take it out of OD.

Im betting the front shaft is having a issue at the tcase connection or a issue at the rear shaft.

Bmw doesn't have a balancing machine at dealers, and many driveline shops don't have a specific machine that is better than others for balancing.

Hope eventually someone opens their eyes for you, id be driving that thru there showroom and trying to run them over if it was me.

.