Drum sick

I have a Passat estate three years old. There is a drumming noise possibly from the rear of the car, mainly at speeds between 50 and 60 mph. My service mechanic does not think its a bearing, could be tyres, or alignment. Or could it just be similar to an echo through the car? I would be grateful for any suggestions you might have.

Asked on 29 May 2010 by BB, Ullenhall

Answered by Honest John
Presuming you drive with the windows closed it could be tyres. If it's worse with the load cover off and the back seats folded then it's road noise from the tyres. But could also be the flaps to the vent system. The air from inside the car vents out through vents hidden by the sides of the rear bumper. Anything interfering with them might cause ain air pressure noise.
Similar questions
I have a Lexus IS250 and it is without doubt the best car I have ever had. Recently, however, it has become comparatively noisy. It is 3 1/2 years old and has done 45,000 miles. The noise increases with...
At speeds below 50mph I get a "rotational" noise, which I am told by Carr's of Bury St Edmunds is down to the run flats (It sounds like a wheel bearing going u/s on a 1960's car). I drive regularly on...
My Mk5 Volkswagen Golf, with hybrid stage two turbo, was making a whistling noise. It's now stopped and won't restart, plus lost all oil. The exhaust shows signs of oil in end pipes. What could this be?
Related models
Spacious and comfortable. Wide range of engines. Big, boot with lockable seatbacks. Generally better from May 2008 onwards.
 

Ask Honest John

Value my car