How to Fix: Squealing Brakes
Squealing brakes are a common issue faced by many UK drivers, often indicating underlying problems within the braking system. Addressing this promptly is crucial to ensure your vehicle's safety and performance. This guide will help you diagnose and fix the issue, whether you're considering a DIY approach or seeking assistance from a reliable garage.
Symptoms to Look For
- ▸High-pitched squealing noise when applying brakes
- ▸Reduced braking efficiency or longer stopping distances
Common Causes & Costs
Worn Brake Pads
moderateBrake pads wear down over time, and when they become too thin, they can cause a squealing noise. This is often due to the wear indicator making contact with the brake disc. To confirm, inspect the thickness of your brake pads; if they're less than 3mm, replacement is necessary.
Estimated cost: £100–£250 per axle
Glazed Brake Discs
moderateOverheating can cause brake discs to develop a hard, shiny surface, reducing their effectiveness and causing squealing. To check, look for a glossy appearance on the disc surface. If present, the discs may need resurfacing or replacement.
Estimated cost: £150–£400 per axle
Seized Brake Caliper
difficultA seized caliper can cause uneven brake pad wear and result in squealing noises. Signs include the vehicle pulling to one side when braking. Inspect the caliper for signs of corrosion or damage; if found, it may require cleaning or replacement.
Estimated cost: £200–£500 per caliper
Brake Dust and Debris
Easy — DIY friendlyAccumulated dust and debris between the brake pad and disc can cause squealing. Regular cleaning can prevent this issue. To confirm, remove the wheel and inspect the brake components for excessive dust buildup.
Estimated cost: £50–£100 for professional cleaning
Step-by-Step Fix
Inspect Brake Pads and Discs
Safely lift the vehicle and remove the wheel to access the brake components. Check the thickness of the brake pads; if they're less than 3mm, they need replacing. Examine the brake discs for glazing or scoring; a shiny or grooved surface indicates the need for resurfacing or replacement.
Clean Brake Components
Use a brake cleaner spray to remove dust and debris from the brake pads, discs, and caliper. Ensure all components are dry before reassembling. This can help eliminate squealing caused by contaminants.
Lubricate Caliper Guide Pins
Remove the caliper and apply high-temperature brake grease to the guide pins. This ensures smooth movement and prevents the caliper from seizing, which can cause uneven pad wear and squealing.
Replace Worn Components
If inspection reveals worn brake pads or damaged discs, replace them with quality parts. Ensure all components are installed correctly and torqued to manufacturer specifications.
Test the Brakes
After reassembly, press the brake pedal several times to seat the pads against the discs. Conduct a test drive at low speed to ensure the squealing is resolved and the brakes function properly.
When to Call a Garage
If you're uncomfortable performing brake inspections or replacements yourself, it's advisable to seek professional assistance. Additionally, if after attempting the above steps the squealing persists, or if you notice other issues like a spongy brake pedal or the vehicle pulling to one side, consult a trusted garage. Use AGarageNearMe.co.uk to find a reliable local garage that can diagnose and fix the problem efficiently.
Not sure what's wrong with your car?
If you are unsure what is causing the problem, chat with John for a free car diagnostic before spending money at any garage.
Frequently Asked Questions
How do I fix squealing brakes?
Identify the cause, such as worn pads or glazed discs, and replace or repair the affected components. Regular maintenance and cleaning can also prevent squealing.
What causes squealing brakes?
Common causes include worn brake pads, glazed brake discs, seized calipers, and accumulated brake dust or debris.
How much does it cost to fix squealing brakes in the UK?
Costs vary depending on the issue. Replacing brake pads can cost between £100 and £250 per axle, while replacing discs may range from £150 to £400 per axle.
Can I fix squealing brakes myself?
If you have mechanical experience, you can perform basic maintenance like cleaning and pad replacement. However, for complex issues or if you're unsure, it's best to consult a professional.
Is squealing brakes dangerous to drive with?
Yes, squealing brakes can indicate underlying issues that may compromise braking performance. It's important to address the problem promptly to ensure safety.
Information is for guidance only. Always prioritise safety — if unsure, consult a qualified mechanic.