Brake Discs

What are Brake Discs?
Brake discs are pretty straight-forward parts, they provide a large surface area for brake pads to clamp onto to slow the car down. The larger the brake disc the larger the stopping surface area, this is why cars like Porsches and Ferraris have huge brake discs filling the inside of the wheel.

Brake discs can suffer from various problems such as corrosion and warping, continual maintenance and checks should be carried out to ensure they're in top condition, it's one of the main parts of the car that can have a direct impact on yours and other people's safety.
What problems can be caused by this part?

Brakes vibrate when braking

When applying the brakes the car doesn't stop smoothly and the brakes seem to vibrate. The vibrations can be felt in the brake pedal.

Car pulls to the left or right when braking

When braking the car veers off to one side, this happens even on a straight section of road. The car seems to pull to the one side.

Brake disc surface is rough / cracked

The surface of one or more of the brake discs appears to be very rough to the touch. There are cracks appearing in the disc.

Brake disc has turned blue in colour

On inspection one or more of the brake discs on the car have turned a blue colour that doesn't look anything like the rest.

Brakes making a clicking sound

When you apply pressure to the brake pedal there is a clicking or tapping sound. The sound can be loud or quiet and usually won't be felt through the pedal itself. It will usually sound like it's coming from one of the corners of the car. The clicking will usually increase or decrease in frequency with the speed of the car, ie it will click aster at higher speeds.

Brakes do not come on smoothly

When pressing the brake pedal the brakes don't apply in a smooth way, they seem to come on all of a sudden and are more bumpy than they used to be.

How much does it cost to replace the Brake Discs?
An average cost to replace a full set of brake discs and pads on a car would be between £300 - £400. This clearly will vary a lot based on the type and size of car and the garage that carries out the work.

Sometimes it's not necessary to replace all the discs at the same time, you will often need only the front or rear replacing. You should try to always replace them in pairs on an axle to ensure consistent braking power and response.
We have 31 owner problems that mention the Brake Discs