Used Audi Brake Servo Units

All used Audi Brake Servo Units listed on Breakeryard.com are tested, original (OEM) manufacturer parts and come with a 14 day money back guarantee. Breakeryard.com list cheap new OES or aftermarket car parts at discounted prices and used OEM car parts up to 80% cheaper than main dealer prices for Audi from premium breaker yards from across the UK.

About Brake Servo Units

The brake servo unit, if fitted, is an aid to the hydraulic braking system. With the operation of the servo unit less force is required on the brake pedal.

The servo unit is situated in the braking system and has a connecting rod that runs between the brake pedal, the master cylinder and fluid reservoir and is commonly found in the engine compartment.

The Audi brake servo unit is a bulbous cylinder which contains a central diaphragm. On each side of the diaphragm there are two separate chambers The cylinder has a vacuum feed from the engine manifold this maintains a vacuum in both chambers. When the brake pedal is pressed an influx of external air is sucked into one side of the diaphragm, the air pressure rises as the vacuum is broken which pushes the diaphragm to assist the movement of the master cylinder which forces the hydraulic fluid through the piping to the slave cylinders on the brakes of each wheel. When the footbrake is released the vacuum is restored to the chamber.

Signs that there's a problem with the Audi brake servo unit can be that the pedal becomes heavy and requires increased force to operate the brakes. 

Audi trivia

• You might think that crash tests in cars have always been a requirement, but it was Audi that first started doing them. Far from the modern methods used today, Audi engineers simply let their cars roll down hills until they hit something. Spectators used to line up to watch the excitement.
• The Olympics Committee tried to sue Audi in 1995, claiming that the four rings logo was too similar to the Olympic rings. Audi easily won.
• The Audi Type K was the first car with left-hand steering as standard. This was one of Audi’s most popular cars, especially in Germany.
• The oldest car race event in the world, the 24hr Le Mans, has been won by Audi an impressive 13 times, most of which were in the classic R8 racer.
• The RS3 is lighter than you might think. That's because the five-cylinder engine isn’t made from cast-iron but instead from aluminium. That means it only weighs around 26kg!