Ravenol

Audi Brake Fluid Change Information

Audi Brake Fluid Change Intervals

Changing Audi Brake FluidWe recommend flushing the entire Audi brake fluid system about every 30,000 miles or 3 years. Changing your Audi brake fluid frequently can help minimize long term brake and clutch system maintenance costs. Clean Audi brake fluid ensures minimal contamination such as dirt and moisture which can cause seal failures, rust, corrosion, and piston scarring within the Audi brake fluid and clutch fluid circuit system. Dirty Audi brake fluid is a common culprit to caliper pistons, brake master cylinders, clutch master cylinders, and clutch slave cylinders problems.

The Audi brake fluid reservoir is vented. These entry points allow for dirt and moisture exposure. Rubber brake hoses also allow for moisture to permeate into the Audi brake fluid. Brake fluid is like a sponge and moisture can be a real problem. Moisture changes the fluid's composition, leading to a lower boiling point. This causes a vapor leak in the brake system, resulting in brake fade. Contaminated Audi brake fluid moving through the brake lines also leads to sediment building up in the brake caliper, affecting the cylinder bores. Some of this dirt and moisture laden fluid also travels to the ABS unit where it causes the solenoids inside to behave erratically. Just 2% moisture in Audi brake fluid is considered excessive and 3% moisture contamination in Audi brake fluid can lower the boiling point nearly 50%.

If your Audi brake fluid was filled with a lower grade Audi brake fluid, it needs to be changed sooner. This is because lower wet boiling point Audi brake fluids accumulate more moisture.

Changing Audi brake fluid is recommended and easiest when performing Audi brake rotor replacement and Audi brake pad replacement service.

How Do I Know My Audi Brake Fluid Needs To Be Changed?

Most Audi's came from the factory with a light amber / tan colored Audi brake fluid. If your original Audi brake fluid has turned a dark amber / brown color it should be changed using approved German DOT 4 or DOT 5 Audi brake fluid.

Basic Overview On How To Flush and Change Audi Brake Fluid

This is a basic overview of how we flush Audi brake fluid. It is not intended to replace the factory manual. Please refer to the factory manual for detailed instructions.

Refer to the factory manual for Audi brake fluid system instructions.
We recommend having an A.S.E. certified Audi mechanic change your Audi brake fluid.Audi Brake Bleeder Tools
Always wear gloves and wear safety goggles when handling Audi fluids.
Getting Audi brake fluid on your vehicles paint finish will damage it.

There are several different methods that are used to flush Audi brake fluid:

• Pressure Bleeding
In our experience vacuum brake bleeders and inexpensive pressure bleeders don't work well because they cannot pull the Audi brake fluid through the ABS unit. You'll need an expensive commercial grade pressure bleeding unit to work effectively.

• Gravity Bleeding
We use this method in our own repair shop. Gravity bleeding works very well using automotive lifts that suspend the car 6 ft in the air.

• Pedal Bleeding
Occasionally the good old fashion pedal bleeding is employed. This method always works and isn't that hard to do.

Bleeding Audi Brake Fluid Using The Brake Pedal Method:

The equipment needed is:

  • A piece of clear hose that will fit onto the bleeder valve.
    This will direct the Audi brake fluid into the drain pan.
  • A wrench for the brake bleeder (sizes vary). Don't use an ordinary open-end wrench.
    A box end wrench or flared fitting style wrench works best.
  • Spray can of automotive penetrating oil.
  • Turkey baster from the wife's kitchen, works to draw the fluid out of the Audi brake fluid reservoir.
    Don't try to clean and reuse it (just buy the wife a new one).
  • A helper to pump the brake pedal.
  1. Loosen all 4 of the brake caliper bleeders. Most of the time these bleeders seize up. We have tricks for loosening them, but that's another story for another page (coming soon).
  2. Using the turkey baster remove the old Audi brake fluid from the reservoir.
  3. Clean the sediment out of the bottom of the Audi brake fluid reservoir. Add the new Audi brake fluid.
  4. Begin bleeding the brakes. Bleed the brake system starting from the brake caliper farthest away from the brake master cylinder. Passenger side rear, drivers side rear, passenger side front, and then the drivers side front.
    • Have a helper pump the brake pedal about 10 times.
    • Immediately after pumping, press down on the pedal. Keep it held down, not letting up on the pedal. Note: The helper must keep constant downward pressure on the brake pedal when the bleeder is open. Air will be re-introduced into the Audi brake system if the pedal is let up while the bleeder is open.
    • While the pedal is held down, use the wrench to loosen the brake bleeder bolt. The old Audi brake fluid and some air will come out. Let the Audi brake fluid flow from the bleeder for about 10 seconds.
    • While the brake pedal is still down and after about 10 seconds, tighten the brake caliper bleeder bolt.
    • The helper can now let up on the brake pedal.
    • Repeat steps A through E until the new blue or amber Audi brake fluid is coming out and no more air bubbles are found.
    • Per the above sequence, move onto the next Audi brake caliper.
      Note: Check the level of the Audi brake fluid reservoir, and refill if necessary before going onto the next side.
  5. Verify that all the air is out of the Audi brake system by a simple test. When you've flushed the entire Audi brake system with new Audi brake fluid, take notice of how firm the brake pedal feels. It should feel hard. Wait about 5 minutes and come back and press on the brake pedal once. It should feel just as it did the last time you pressed it. The second pedal depression should feel just as the first. If not, flush your Audi brake fluid again looking for air bubbles. If no air bubbles are found and the pedal is quite soft look for other Audi brake problems.
  6. If you have a manual transmission, don't forget to flush the Audi brake fluid in the clutch circuit. Flushing the Audi brake fluid from the clutch master cylinder and slave cylinder are many times overlooked.

 

DON'T FORGET ABOUT THE BRAKE HOSES

Audi Brake HoseOver time, due to aging, your Audi brake hoses need to be replaced. We recommend replacing brake hoses at least every 8 years. It's also imperative to closely inspect all brake hoses to make sure that they're in good functioning condition every time you perform brake service. Aging Audi brake hoses can become deformed, develop weak spots, bulge, and collapse, which can cause unsuspected brake failure upon bursting.

We've also heard from customers who are unsure of their previous brake service history. Unbeknownst to them, during previous brake replacement, an Audi brake hose has been pinched or kinked causing it to collapse internally.

A collapsed brake hose changes Audi brake fluid pressure, causing the brake caliper to not fully release, resulting in brake drag, leading to prematurely glazed and worn pads and warped rotors.

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Shop Audi Brake Hoses

 

BACK TO TOP

As the original independent Audi service garage with over 27 years of hands-on experience, we've seen many mechanical breakdowns on vehicles. Experience has shown that changing your fluids is the single most important preventive maintenance routine you can perform to avoid vehicle breakdowns. Yet, for many Audi owners, this seems to be one of the most neglected areas of maintenance. Thoroughly flushing your fluids at the proper intervals can help your car reach 150,000 miles and beyond!


Audi Brake Fluid - Ravenol Audi Brake FluidRavenol

Since 1946, Ravenol of Germany has been at the forefront of innovation, creating the highest quality oils and lubricants specific to advanced European applications. Read more...

Ravenol carries Formal Factory O.E. Approvals from many of the world's leading manufacturers, such as:
• Audi / VW (VAG)
• BMW
• Porsche
• Mercedes-Benz
• Chrysler
• Volvo
• ZF
• Cummins
• MAN
• MTU


Audi Brake Fluid Features

Blauparts® only stocks Audi brake fluid that meet approved Audi VW specifications. All customers should check their Audi owner's manual and subsequent Audi factory service manual for what Audi brake fluid is recommended for use in their vehicle.

DOT 4 Audi Brake Fluid

Ravenol DOT 4 is a high performance Audi brake fluid designed for vehicles fitted with modern braking and ABS systems. Ravenol DOT 4 Audi brake fluid offers specially selected additives to give the best all around braking.

Audi Brake Fluid - Audi Dot 4 Brake Fluid

Audi Brake Fluid Meets / Approved For:
Applicable for hydraulic braking and clutch systems. Compatible with all brake systems requiring DOT 4 Audi brake fluids.

Ravenol DOT 4 Audi Brake Fluid: 1 Liter Bottle (1000ml) Mfd in Germany

  • Exceptional performance.
  • A dry boiling point of 500° F
  • A wet boiling point of 330° F.
  • Gives ABS and brake systems optimum efficiency and lubrication.
  • Long life Audi brake fluid with 3 year change interval.
  • Designed for excellent resistance to moisture absorption.
  • The perfect Audi Audi brake fluid for all driving conditions.

LINKS
Audi Brake Fluid - DOT 4

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DOT 5.1 Audi Brake Fluid

Ravenol DOT 5.1 is a high performance street or racing Audi brake fluid designed for vehicles fitted with modern braking and ABS systems. Ravenol DOT 5.1 Audi brake fluid offers specially selected additives for superior braking in extreme conditions.

Audi Brake Fluid - Audi Dot 5.1 Brake Fluid

Audi Brake Fluid Meets / Approved For:
Applicable for hydraulic braking and clutch systems. Compatible with all brake systems requiring DOT 5.1 Audi brake fluids.

Ravenol DOT 5.1 Audi Brake Fluid Features:

1 Liter Bottle (1000ml) Mfd in Germany - Gold in color.

  • Exceptional performance.
  • A dry boiling point of 536° F
  • A wet boiling point of 356° F.
  • Gives ABS and brake systems optimum efficiency and lubrication.
  • Long life Audi brake fluid with 3 year change interval.
  • Designed for excellent resistance to moisture absorption.
  • The perfect Audi Audi brake fluid for all driving conditions.

LINKS
Audi Brake Fluid - DOT 5.1

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