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Rattling From The Rear Of The Car

A rattle from the back of the car over rough roads usually comes from loose items in the boot, the spare wheel, the tow bar, the exhaust hangers or worn rear suspension parts.

Normal risk

Usually not urgent. Have it checked if it comes with knocking over bumps or a low-hanging exhaust.

Short answer · How do I find a rattle at the back of the car?

Start with the simplest causes: the jack, tools, spare wheel and parcel shelf. Then look under the car at the exhaust silencer and its rubber hangers, which wear and let the exhaust knock. Worn rear shock absorber mounts, anti-roll bar links and bushes rattle or knock over bumps.

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Safe checks you can do

  1. Empty the bootRemove loose items and check that the spare wheel and jack are secure.
  2. Check the parcel shelf and seatsLoose shelves and seat belt buckles rattle.
  3. Shake the exhaust gentlyWith the exhaust cold, move the tailpipe and listen for knocks.Only touch the exhaust when it is completely cold.

Questions that narrow it down

  1. Only over rough roads?Suspension parts or loose items.
  2. Does it follow engine speed?Points to the exhaust.
  3. Does it change with load in the boot?Suspension or tow bar.

Possible causes

Listed without ranking. Use the questions above to see which ones fit your car.

  1. Loose items in the bootJack, tools, spare wheel.
  2. Worn exhaust hangersExhaust knocks against the body.
  3. Rear shock absorber mountsRattle over bumps.
  4. Anti-roll bar links or bushesSmall knocks on uneven roads.
  5. Loose tow bar or trimRattles at the bumper.

Questions about Rattling From The Rear Of The Car

Can a rattling exhaust break?

Yes. Worn hangers put stress on joints, which can crack.

Why does it only rattle in cold weather?

Rubber parts harden in the cold and pass more noise.