If a knocking sound is being produced when driving the AudiA3 over bumps, the first thing to check is a loose spare tire or a jack. If the problem persists, then the issues can range from a worn-out bushing to a fault in the suspension ball and joint, or the suspension shock or strut. In any case, You should get Your suspension checked and fixed. If it's an issue with the ball and joint, the technician will notice a leaking lubricant or a worn-out boot. If the problem is with the suspension strut or shock, You will also start to feel that rides in Your car become really bumpy. The ball and joint replacement will cost You about $340 to $450 and that of the strut will cost from $1000 to $1110 on average.
Scott H
July 30, 2020
If you hear a clunk as the Audi A3 suspension operates over bumps, the possible cause is inadequate joint clearance due to wear. It may be as basic as a loose strut gland nut, or something more complex as a shrunken, dried rubber bushing.
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