Worthing | Sompting | West Sussex

Car Noise Investigations

Car making a knocking, clunking, rattling or grinding noise? At our Worthing and Sompting garages, our technicians track down exactly where it's coming from and why, using NVH testing equipment to pinpoint noises that are hard to find by ear.

Knocks, Rattles & Squeaks

Car Noise Diagnosis, Without the Guesswork

Some noises only appear over speed bumps, on full lock, from cold or at certain speeds, which makes them tricky to track down. Rather than replacing parts by process of elimination, our technicians find out how and when the noise happens, road test and inspect your vehicle, and use NVH (noise, vibration and harshness) testing to pinpoint the exact source. We'll then explain what we've found and talk you through the repair before any work goes ahead.

Diagnostic tablet connected to a car during a noise investigation at Cedar Garage

When Should You Get a Noise Checked?

Most new noises are an early warning that something is wearing or working loose. If you notice any of the following, it's worth booking a noise investigation sooner rather than later.

Knocking or clunking over bumps

Squealing or grinding when braking

Humming that gets louder with speed

Clicking when turning on full lock

Rattling or whining under the bonnet

The Noises We Investigate

Every noise has a cause, and catching it early often means a simpler repair. Once we've found the source, we fit genuine manufacturer parts or high-quality OEM-equivalent alternatives to the correct specification for your vehicle, and we're happy to talk through the options with you.

Technician inspecting suspension on a car raised on a ramp at Cedar Garage
Knocks & Clunks

Suspension & Steering Noises

A knock or clunk over speed bumps and potholes usually points to worn suspension or steering parts, such as drop links, ball joints, bushes, top mounts or a broken coil spring. Left too long, these can affect handling and tyre wear, so we'll find the worn part and replace it.

Worn brake caliper and disc inspected for brake noise at Cedar Garage
Squeals & Grinding

Brake Noises

Squealing, scraping or grinding when you brake is often a sign of worn pads, a wear indicator doing its job, or discs that need replacing. Grinding can mean the pads are worn down to the metal, so it's worth getting checked quickly before it causes further damage.

Technician checking a Jaguar wheel on the ramp for wheel bearing noise
Humming & Droning

Wheel Bearing & Tyre Noise

A hum or drone that gets louder as your speed rises is commonly caused by a worn wheel bearing, though uneven tyre wear can sound very similar. We'll check both, so only the part that's actually causing the noise gets replaced.

Technician working on a Volkswagen in the Cedar Garage workshop
Clicks & Whines

Driveshaft & Gearbox Noises

A clicking noise when turning on full lock is a classic sign of a worn CV joint, often after a split boot has let dirt in. Whining or clunking when pulling away or changing gear can point to the gearbox, clutch, differential or worn engine and gearbox mounts.

Citroen DS3 timing belt replacement at Cedar Garage
Rattles & Squeals

Engine & Belt Noises

A squeal on start-up often comes from a worn or slipping auxiliary belt or tensioner, while rattling, ticking or tapping from the engine can point to timing chain wear, a failing pulley or low oil. Engine noises are worth investigating early, as some can lead to serious damage.

Audi raised on a lift in the Cedar Garage workshop for an underbody inspection
Rattles & Blowing

Exhaust & Heat Shield Noises

Rattles from underneath the car are often a loose or corroded heat shield, while a blowing or roaring sound can mean an exhaust leak, a failed joint or a broken mount. Exhaust leaks can also lead to an MOT failure, so we'll find the source and repair it.

Is your car making a noise that won't go away?

Book a noise investigation at our Worthing or Sompting garage today.

Collection & Delivery

We can collect your vehicle and deliver it back to you.

Hire Cars Available

Stay on the road with our hire cars.

Smooth, Hassle-Free Service

We make the process easy from start to finish.

Technician inspecting the underside of a MINI on a ramp at Cedar Garage
Frequently Asked Questions

Car Noise FAQs

Is it safe to drive my car if it's making a noise?

It depends on the noise. A faint squeak may not be urgent, but a new knock, clunk or grinding sound could be a safety issue. If it's loud, getting worse or the car drives differently, get it checked as soon as possible.

Why does my car make a clunking noise over bumps?

A clunk over bumps is usually caused by worn suspension parts. Book in and we'll inspect the suspension and road test your car to find the cause.

What causes a humming noise that gets louder with speed?

It's often a worn wheel bearing, but uneven tyre wear can sound very similar. Book in and we'll find out which it is before recommending a repair.

Why does my car click when I turn the steering wheel?

A clicking noise when turning, often when parking or pulling out of junctions, usually means a worn driveshaft joint. Book in and we'll take a look.

How do you find a noise that's hard to pin down?

We use special equipment that listens to different parts of the car while we drive. It helps us find exactly where the noise is coming from, so we don't replace parts by trial and error.

What if the noise doesn't happen when I bring my car in?

That's common, as many noises only happen at certain times. Tell us as much as you can when you book, and a short video or recording on your phone can be really helpful.

How long does a noise investigation take?

Many noises can be found during a road test, but some take longer to track down. We'll keep you updated and won't carry out any repairs without speaking to you first.

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Ryan Kerr profile picture
Ryan Kerr
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Took my Tesla Model 3 to Cedar Garage on Tarring Road after an aftermarket body kit's rear diffuser brake light caused hyper-flashing when braking and indicating. Jake was fantastic-he diagnosed the wiring issue quickly and had it sorted on the spot. I was back on the road in under an hour with everything working flawlessly. Jake is a top bloke: friendly, informative, and skilled. Outstanding service!
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Russell Anthony profile picture
Russell Anthony
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Professional service, good communication, affordable, highly recommended.
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John olley profile picture
John olley
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Excellent efficient services carried out by nice people. Would recommend this company who take a pride in looking after their customers.
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Dorothy Smith profile picture
Dorothy Smith
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I feel fortunate to have found Cedar Garage to look after my car. It’s always good to be able to trust the skill, care and attention given as well as friendly communication and advice. They collected and returned my vehicle too, what’s not to like?
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John Rawlings profile picture
John Rawlings
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I have used Cedar Garage for a number of years and this is because in that time I have always been entirely satisfied with the work carried out. The work carried out is of a high standard, competitively priced and is combined with a good customer service
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K Mitch profile picture
K Mitch
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Polite & efficient service from cedar I would recommend these guys for your automotive needs
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Kathryn Masters profile picture
Kathryn Masters
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I use Cedar Garage as the staff are polite informative and friendly. They explain and show you the work that has been done. Always keep you informed on any faults they find. Excellent service.