Signs Your Brake Pads Need Replacing
Squealing, grinding or a warning light can all mean worn pads. Here’s how to read the signs, check the thickness and know when to stop driving.
The clearest signs your brake pads need replacing are a high-pitched squeal when braking, a grinding noise, a brake wear warning light, a car that pulls to one side, or a longer stopping distance. Grinding is the one to take most seriously: it can mean the pad material has gone and metal is touching the disc.
Noises that matter
Squealing or screeching
Many pads have a small metal indicator that squeals against the disc as the pad nears the end of its life. That’s the pad asking to be looked at. A light squeak on the first few stops of a damp morning is often just surface rust on the discs clearing off, so what matters is whether the noise stays once the brakes have been used a few times.
Grinding or a harsh scraping
This can mean the friction material has worn through. The backing plate then cuts into the disc, stopping power falls and the disc may need replacing too. Stop driving the car and arrange a repair.
What you’ll feel through the pedal and wheel
- Longer stops. If you’re braking earlier than you used to, don’t put it down to habit.
- Pulling to one side. This can come from uneven pad wear or a sticking caliper.
- Vibration through the pedal or steering wheel. This often points to disc problems rather than pads alone.
- A soft or spongy pedal. This is not a normal wear sign. It can mean air in the system or a fluid leak, so treat it as urgent.
Warning lights
Not every car has wear sensors, but those that do show a dashboard warning as the pads get low. The RAC says this usually happens at about 3mm of friction material. Don’t confuse that with the main red brake warning light, which can relate to low brake fluid, the handbrake or a system fault. Check your handbook, because the symbols vary between cars. If a red brake warning light stays on while you drive, stop somewhere safe and get advice before going any further.
How to check your pads
On many cars you can see the outer pad through the wheel spokes. Use a torch and look for the pad material pressed against the disc. New pads are thick; when there’s only around 3mm left, it’s time for replacement. Bear in mind you’re only seeing the outside pad, and the inner one can wear faster, so a clean-looking outer pad doesn’t prove everything is fine. Some wheel designs hide the pads completely. Also run your eye across the disc: deep grooves or a lip at the edge are worth mentioning when you call.
How long do brake pads last?
There’s no fixed mileage. The RAC gives a typical range of 30,000 to 70,000 miles, depending on driving style, the weight of the car and the pad type. Stop-start town driving wears pads faster than steady motorway miles, and front pads usually go first because they do most of the braking.
What the MOT says about brake pads
The MOT inspection manual is specific. Pads worn down to the wear indicator are a major defect, which is a fail. Pads worn below 1.5mm are classed as dangerous. An illuminated brake wear light on its own isn’t a reason for failure, but it’s still telling you something. Our pre-MOT preparation can pick up worn pads before the tester does.
When not to drive
If the pedal goes to the floor, the brakes have failed or fade badly, or you can hear metal on metal, don’t drive the car. Have it repaired where it stands or recovered.
A brake fault you’re driving on is also a legal risk. GOV.UK warns that driving a vehicle in a dangerous condition can bring a fine of up to £2,500, a driving ban and 3 penalty points.
Can pads be replaced at home?
Pads and discs are often a good fit for a mobile job, provided the car is on a level, safe surface. Our brake repairs page explains what we can do on a driveway or in a suitable car park. A seized caliper or a corroded fitting can change the job, so we’ll tell you honestly if it needs a garage ramp instead.