What does a brake caliper do?

Brake calipers are an essential part of your car's braking system. The job of the caliper is to slow the car's wheels by creating friction with the rotors. The most common is floating caliper, but on some cars there are swinging and fixed calipers. It fits over the rotor like a clamp. Inside each caliper is a pair of metal plates bonded with the brake pads.

When the driver presses the brake pedal, the small brake cylinder piston compresses brake fluid in the master cylinder. Because the brake fluid doesn't compress, this force is instantly transmitted to the brake caliper, which clamps the spinning rotor, causing the wheel to slow and stop.

Though only comprising a few parts of your car, brake calipers are one of the most critical parts, enabling controlled braking in various situations. As they are a key safety component of your car, it’s important that your brake calipers are well maintained and fully functioning at all times. If you think there may be an issue with your calipers or braking system, it’s important to get things looked at by a mechanic as soon as possible.

Audi

Audi AG is a German automobile manufacturer, established over 100 years ago in April 1910, and has been owned by the Volkswagen Group since the 1960s.

How popular is Audi in the United Kingdom?

This marque design and engineer luxury vehicles and distributes them worldwide. In the UK alone, there were over 1.7m Audi vehicles on the roads in the final quarter of 2018; a number that is continually growing year after year, and has more than doubled in the past decade.

Audi’s success can be attributed to its ability to move with the times, retaining its reputation as a prestige manufacturer and as part of the ‘big 3’ German marques responsible for high sales throughout the world market, alongside Mercedes and BMW.

Luxury executive vehicles for every type of driver

Audi’s current range features predominantly luxury executive and family cars of varying sizes: with compact to full-size saloons, coupés and sportback models, complemented by a growing range of SUV and sports car models.

Vorsprung durch Technik

The Audi brand is easily recognisable by their 4-ring logo—originally representing the four car companies to create Audi’s predecessor company, Auto Union—and their world famous slogan that ran for over 30 years, translated as ‘Being ahead through technology’. Despite no longer being used in their mainstream marketing, the meaning behind it still stands true of the brand today.

Audi: A sensation in rallying motorsport

Throughout the 1980s the Audi Quattro was famous for dominating rallying worldwide. The introduction of their four-wheel drive turbocharged model went on to win the World Rally Championships in both 1983 and 1984 and amassed a number of podium finishes and titles throughout the decade, all across the globe.

Audi’s reliability and reputation

Audi ranked 20th place out of 30 car brands in the What Car? Reliability Survey in 2018. Audi’s reputation for creating reliable running vehicles has steadily improved over time to become a strong contender to some of the Asian brands that have continued to dominate in this area.

How often should a brake caliper need replacing?

Brake calipers are usually very durable. On modern vehicles, it's not uncommon for calipers to last at least 100,000 miles or 10 years. However, if you experience any of the above symptoms, you should have your brakes inspected by a mechanic as soon as possible. Driving with stuck, damaged or faulty brake calipers is very dangerous as it will impact the effectiveness of your braking, meaning your presence on the road is a danger to all other road users.

It’s also important to keep in mind that bad brake calipers can cause excessive wear to the brake discs and pads, so having them repaired or replaced as soon as possible will be better for your wallet in the long-run.

What happens during a brake caliper replacement?

Our certified mechanics will:

• Inspect the brakes and determine if there’s a problem with one or several of the brake calipers. They will also advise if other parts of the braking system need replacing too.

• They will then replace the brake caliper and other parts of the brake, if necessary.

• Bleed the brake system and top up the brake fluid.

• Test drive the car and inspect the brake system again.

• Make any final, necessary adjustments.

What causes a brake caliper to break?

In general, brake pads and rotors wear out and need replacement far more often than calipers. Calipers tend to get damaged when a car is driven with worn-out brake pads or warped rotors. If these components are damaged it can cause the calipers to overheat, wear down or crack.

Calipers can also break if the rubber boot that protects the piston splits. Once this occurs, water and grit will seep into the pistons surface and cause pitting, which can lead to the piston getting stuck or damaged.

When should a brake caliper be replaced?

Brake calipers are pretty tough and durable. On modern cars, calipers should last at least 100,000 miles or 10 years. However, if you experience any of the above symptoms, you should have your brakes inspected by a mechanic as soon as possible.

What are the symptoms of a bad brake caliper?

Usually, there a few signs you can look for:

• If your brake pedal feels softer (less resistance when applying the brakes).

• If your car pulls to one side when braking.

• If the level in your brake fluid reservoir drops or if you notice a leak. Brake hydraulic fluid is a very pale golden colour, transparent and almost watery.

• If you notice brake fluid on the rims of your wheels.

• If you receive an advisory note regarding brake imbalance.

How often should you replace your brake caliper?

If you experience any of the above symptoms, you should have your brakes inspected by a mechanic as soon as possible. Driving with stuck, damaged or faulty brake calipers is very dangerous as it will impact the effectiveness of your braking, meaning your presence on the road is a danger to all other road users.

It’s also important to keep in mind that bad brake calipers can cause excessive wear to the brake discs and pads, so having them repaired or replaced as soon as possible will be better for your wallet in the long-run.

What happens during a brake caliper replacement?

Our certified mechanics will:

• Inspect the brakes and determine if there’s a problem with one or several of the brake calipers. They will also advise if other parts of the braking system need replacing too.

• They will then replace the brake caliper and other parts of the brake, if necessary.

• Bleed the brake system and top up the brake fluid.

• Test drive the car and inspect the brake system again.

• Make any final, necessary adjustments.

What is the average life of a brake caliper?

Generally, brake calipers are tough and durable. On modern vehicles, it's not uncommon for calipers to last at least 100,000 miles or 10 years. However, if you experience any of the above symptoms, you should have your brakes inspected by a mechanic as soon as possible.

Can you drive with a broken brake caliper?

No, you should not drive with a bad brake caliper. Driving with stuck, damaged or faulty brake calipers is very dangerous as it will impact the effectiveness of your braking, meaning your presence on the road is a danger to all other road users.

The law, vehicle regulations and your MOT

The efficiency and balance of brakes is checked on MOT tests, therefore it's important that every component of your brake system is in good condition, including your brake calipers. Because your brakes are arguably the most crucial safety component in your car, your vehicle will fail its MOT if they are not functioning properly or are damaged.