Brake discs, also known as rotors, play a critical role in your vehicle’s braking system. They work alongside brake pads to create the friction needed to slow down or stop your car. Over time, the constant pressure and heat generated during braking cause wear and tear, making replacement essential for maintaining safety and performance.
Signs That You Need a Brake Disc Replacement
- Vibrations While Braking
- If you feel a shaking or pulsating sensation in the steering wheel or brake pedal, it often means the brake discs are warped. Warping occurs due to excessive heat buildup, leading to uneven surfaces that cause vibrations.
- Squeaking or Grinding Noise
- A high-pitched squeal usually means that the brake pads are worn, but if you hear a grinding noise, your brake discs may already be damaged. Grinding can occur when metal components rub against each other due to completely worn-out brake pads.
- Longer Stopping Distance
- If you notice that your car takes longer to stop than usual, it could indicate worn brake discs or brake pads. Reduced braking efficiency is a serious safety risk, especially in emergency situations.
- Visible Wear, Scoring, or Cracks
- Deep grooves, rough surfaces, or visible cracks on the disc mean that it needs to be replaced. A professional mechanic can measure the disc thickness to determine if it’s below the minimum safe level.
The Brake Disc Replacement Process
- Inspection – The mechanic checks the brake disc thickness, surface condition, and overall wear.
- Wheel and Caliper Removal – The wheel and brake caliper are taken off to access the brake disc.
- Old Disc Removal – The worn-out brake disc is removed, and the hub surface is cleaned.
- New Disc Installation – A new brake disc is fitted, ensuring proper alignment and torque specifications.
- Brake Pad and Caliper Reinstallation – The caliper and brake pads are reattached, ensuring everything is secured.
- Brake Test – The braking system is tested to confirm smooth and responsive braking.
Brake Disc Replacement Cost
The cost of brake disc replacement depends on factors like car make, model, and labor rates. On average:
- Front Brake Disc Replacement: £150 – £400
- Rear Brake Disc Replacement: £120 – £350
Luxury or high-performance vehicles may have higher costs due to specialized brake components.