Wheel Bearing Noise: Symptoms and Why Not to Ignore It
Written by Petro Olekhnovych, mobile mechanic in Aylesham, Kent
What a wheel bearing does
Each wheel turns on a set of steel balls or rollers held in a sealed unit called the wheel bearing. It carries the weight of the car while letting the wheel spin freely. When the seals fail, water and grit get in, the grease washes out and the surfaces start to wear. The result is noise, roughness and eventually play.
Wheel bearing noise symptoms
- Humming noise when driving that gets louder as speed increases, often noticed first at 30 to 50 mph.
- Noise changes on bends. A failing left bearing often gets louder when turning right, because more weight moves onto it, and the opposite for the right.
- Growling or grinding as the wear gets worse.
- Vibration through the steering wheel, floor or seat.
- Clicking or knocking when cornering in some cases.
- ABS warning light on cars where the wheel speed sensor reads from the bearing. See our page on the ABS warning light.
- Uneven tyre wear or the steering feeling vague.
Need a service or brakes doing?
Servicing, pads, discs and fluids done on your driveway across East Kent.
WhatsApp for a free quote Call 07563 350335 Contact form
Labour £30 to £50 per hour depending on the job. Send your reg number and we will reply with a price before any work starts.
Wheel bearing or tyre noise?
A worn or unevenly worn tyre can sound very like a bearing. Here are some clues:
| Clue | Wheel bearing | Tyre |
|---|---|---|
| Changes when you gently weave | Usually yes | Usually little change |
| Changes with road surface | A little | Often a lot |
| Tread looks stepped or feathered | No | Often yes |
| Play when wheel is rocked | Possible | No |
Noises from underneath can also come from suspension parts, which usually knock over bumps rather than hum. Our guide to suspension knocking over bumps covers that.
What causes bearings to wear
- Pothole and kerb impacts. A heavy hit can damage the bearing surfaces even if the wheel looks fine. Kent lanes after a frosty winter are full of them, which we cover in our guide to pothole damage in Kent.
- Water and salt. Deep puddles, flooded lanes and gritted roads wash into tired seals.
- Age and mileage. Bearings simply wear out eventually.
- Incorrect fitting of a previous bearing, or wrong hub nut torque.
- Heavy loads such as regular towing.
Safe checks you can do
- Listen on a quiet, safe road. Note the speed when the noise starts and whether it changes as you weave gently within your lane.
- Check the tyres for uneven wear, bulges and correct pressures.
- Feel for heat carefully. After a drive, hold the back of your hand near each hub without touching. One very hot hub can mean a bearing or a dragging brake.
- Do not lift the car on a jack to rock the wheel unless it is properly supported on axle stands. This check is best left to a mechanic.
When to stop driving
Stop and get help if the noise turns into loud grinding, the steering feels loose or wanders, you feel the wheel wobble, or there is a burning smell from one wheel. A bearing that collapses can lock the wheel or let it move on the hub, which is dangerous at speed.
How we can help
We come to you across Aylesham, Canterbury, Dover, Deal, Sandwich, Folkestone and nearby villages. With the car safely raised, we check each wheel for play and roughness, inspect the tyres, brakes and suspension, and read any ABS fault codes. That tells you which corner is at fault and whether it is the bearing or something else. Whether we can replace the bearing at your home depends on the car and the design, so send us the reg and we will tell you. It is also something we look at in a pre-MOT check.
Labour is £30 to £50 per hour depending on the job, with a quote before work starts. Message your reg and postcode on WhatsApp 07563 350335 or use our contact page.
Need a service or brakes doing?
Message us on WhatsApp with your reg and postcode, or use our contact form, for a price before any work starts.
WhatsApp for a free quote Call 07563 350335 Contact form
Labour £30 to £50 per hour depending on the job. Send your reg number and we will reply with a price before any work starts.
Frequently asked questions
What does a bad wheel bearing sound like?
Usually a humming, droning or growling noise that gets louder as you speed up, a bit like tyre roar. It often changes when you steer gently one way or the other, which helps tell it apart from tyre noise.
How long can I drive with a noisy wheel bearing?
There is no safe fixed mileage. Some bearings hum for a while, others get worse quickly, and in the worst case a bearing can seize or the wheel can develop serious play. Get it checked as soon as you notice the noise.
Can a wheel bearing fail an MOT?
Yes. Excessive play or roughness in a wheel bearing is checked at the MOT and can be a failure. A noise on its own may be given as an advisory, but it should not be left.
