New exhaust making humming noise

Our garage has just fitted a new rear exhaust pipe to our 2005 Fiat Panda. My wife is fed up because the car now has a humming noise, especially at high speeds. The garage checked for leaks by putting a hand over the exhaust pipe-the engine stopped. Will the noise go with time?

Asked on 20 June 2014 by John Harris

Answered by Honest John

It's the baffles in the silencer resonating. If you want the original noise you will need to make sure that a FIAT rear silencer box is fitted.

Tags: unexplained noises technical issues

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