If you hear banging or knocking noises when driving over bumps, it’s usually a sign that something in your suspension or steering system is worn, loose, or damaged. These components are designed to absorb shock and keep your car stable, so when they fail, the result can be loud noises, poor handling, and potential safety risks.

What causes banging noises over bumps?

Common causes of banging noises when going over bumps include:

• Worn or damaged shock absorbers or struts
• Loose suspension components such as control arms or sway bar links
• Damaged or worn-out bushings and ball joints
• Loose exhaust components rattling against the chassis
• Broken or weakened springs

Why do you need to fix banging noises quickly?

Ignoring suspension or steering issues can lead to more costly repairs and compromise your safety. Worn components affect how your car handles, reduces ride comfort, and increases stopping distance. In some cases, parts may break completely, leaving your car unsafe to drive.

How do you know when to get it checked?

You should have your car inspected if you notice:

• Loud banging, knocking, or clunking noises when hitting bumps
• Excessive bouncing or poor stability while driving
• Uneven tyre wear
• Steering that feels loose or unresponsive

What happens during an assessment?

A mechanic will:

1. Test drive the vehicle to replicate the noise
2. Inspect suspension components including shocks, struts, springs, and bushings
3. Check steering linkages and sway bar connections
4. Look for loose exhaust or underbody parts
5. Provide a diagnosis and recommend repairs

How much does it cost to fix?

The cost depends on the exact cause of the noise. Minor fixes such as replacing sway bar links may cost $150–$300, while major repairs like new shocks, struts, or control arms can range from $500–$1,500+ depending on the vehicle.

Is it unsafe to drive with banging noises?

Yes. Banging noises usually point to suspension or steering wear, which can affect your car’s handling and braking. Driving with these issues may increase your risk of an accident. It’s best to get the problem assessed and repaired as soon as possible.