Hi everyone. I am writing from Singapore.
I drive a March 2005, X5 E53 3.0i with a M54 engine. Mileage is 110,000km.
Over the past couple of weeks, the car has been giving out engine vibrations when I drive over 80km/h. It moves off smoothly and once it hits 80-90kmh, the vibrations. I release the accelerator and rev up again, and the vibrations are still there. The steering and accelerator also vibrates. It feels like something has come loose very severely.
My car is serviced regularly and used to drive beautifully.
I went to my usual authorised workshop who told me the engine mounting is faulty, and replaced both engine mounts. Still, vibrations are there. Then they change the spark plugs and ignition coil. Vibrations still there and still as bad. They plug the car into the BMW diagnostic machine but can't detect anything.
I tried going to various other mechanics. All can't detect anything. Some tell me my automatic transmission needs an overhaul. But they don't guarantee it as when they test the car, the transmission works fine.
Would appreciate any help of advice from fellow E53 users out there. Love the car, but am saddened by its state now.
Thanks everyone.