Why does my car make a clunking noise over bumps?
A clunking or knocking noise when going over bumps is a classic sign of worn suspension components. The most common culprits are anti-roll bar drop links, wishbone bushes, or ball joints. These are all relatively straightforward repairs. Left too long, worn suspension components can affect handling and cause uneven tyre wear, eventually becoming an MOT failure.
Likely causes
Worn anti-roll bar drop links
Very common — inexpensive repair, significant clunk over bumps or when turning
Worn wishbone/control arm bushes
Rubber bushes deteriorate with age — clunk or knock over bumps and during acceleration
Worn ball joint
Clunking especially when turning as well as over bumps — important safety component
Worn shock absorber top mount
Clunk from inside the car over bumps, often felt through steering wheel
Worn springs
Broken or settled springs can cause clunking — check ride height on both sides
Repairs you may need
Typical cost range: £80–£600 — Drop links: £60–150. Wishbone/bushes: £150–400. Ball joint: £120–280. Shock absorbers: £150–400 per axle.
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