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Audi A4 Quattro Brake Booster Replacement

Brake boosters provide the power necessary to bring your car to a stop and are a key part of power braking systems. As such, the replacement cost varies greatly depending on the year, make, and model of your car.

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Range for All Cars

$325 $1250

This range covers an average brake booster replacement. Tell us your car to get a guaranteed price from RepairSmith.

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Audi A4 Quattro Brake Booster Replacement

RepairSmith offers upfront and competitive pricing. The average cost for Audi A4 Quattro Brake Booster Replacement is $511. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

Car
Location
Quoted on
Price
1998 Audi A4 Quattro
1.8L L4 Turbo Base • 339,000 miles
Las Vegas NV 89138
Nov 23, 2020
$468 - $572
2002 Audi A4 Quattro
1.8L L4 Turbo Avant • 113,000 miles
Woodland CA 95695
Nov 17, 2020
$421 - $515
2006 Audi A4 Quattro
3.2L V6 Base • 226,000 miles
Hood CA 95639
Nov 16, 2020
$432 - $528
2019 Audi A4 Quattro
2.0L L4 Turbo Premium Plus • 14,000 miles
Saratoga CA 95070
Nov 9, 2020
$424 - $518
2020 Audi A4 Quattro
2.0L L4 Turbo Ultra sport • 22,000 miles
Fontana CA 92337
Nov 3, 2020
$446 - $545
2008 Audi A4 Quattro
3.2L V6 Cabriolet • 19,000 miles
Sonoma CA 95476
Oct 30, 2020
$486 - $594
2005 Audi A4 Quattro
1.8L L4 Turbo Base • 209,000 miles
Sun Valley CA 91352
Oct 22, 2020
$467 - $571
2012 Audi A4 Quattro
2.0L L4 Turbo Base • 61,000 miles
Walnut CA 91789
Oct 19, 2020
$507 - $619
2005 Audi A4 Quattro
3.0L V6 Cabriolet • 67,000 miles
Santa Clara CA 95052
Oct 5, 2020
$500 - $611
2002 Audi A4 Quattro
3.0L V6 Avant • 31,000 miles
Sacramento CA 95852
Sep 18, 2020
$443 - $541
Last Updated:
Jan 21, 2021 4:52 PM
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What is a Brake Booster?

You know how a booster seat is like a booster…for your seat? Well, a brake booster is like a booster…for your brakes. Is your brain blown yet?

So here’s the skinny: Do “leg day” five days a week if you want, you’re still not strong enough to use the brakes on your car effectively. So, a booster is there to help you out, and provide the power to your brake pedal necessary to bring your car to a stop. Boosters are a key part of power braking systems. The brake booster creates extra force when you depress the brake pedal, and sends that force to the master cylinder and brake calipers, which apply the brake pads, which clamp down on the brake rotors, which slow your car down.

There are three primary types of brake boosters. The first type is called a vacuum booster. Vacuum boosters utilize vacuum power created by the engine to boost the braking ability of the car. The vacuum also contains a check valve. The check valve sucks out any unwanted air that might be trapped in the vehicle's brake booster. Hydraulic boosters which are typically use power steering fluid for added pressure. And electrohydraulic boosters use brake fluid and an electric pump.

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Symptoms of a failing Brake Booster

Lack of braking power

If you want to be a hotshot and prove your ability to brake without power, now’s your chance. Cars didn’t used to have power brakes, and they were, well, harder to brake in. If you find it becoming labor intensive to use the brake pedal, and your stops taking longer and longer, you’ve lost your power brakes, which could be a result of a busted booster that needs to be replaced.

Leaks

Here’s hoping you don’t have leaks, in your car or . . . elsewhere. But if you do (in your car, that is), it could be hydraulic brake fluid leaking from a damaged brake booster. Again, leaks are a sign that a new replacement brake booster is needed.

Warning lights

Look, we know you like to ignore the warning lights when they pop up on your dashboard. You and everyone else. If your brake booster is malfunctioning, the ABS or traction control warning lights might come on. You may even get the famous check engine warning light which means you should probably get your engine checked too.

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How urgent is a Brake Booster replacement?

Brakes are very important. If this is new information to you, then we need to have a talk.

You need your brakes to drive without crashing. When your press down on your brake pedal and does not function as it should, get your brake booster fixed. Get them fixed immediately!

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