Only use the brake fluid type printed on top of the brake fluid reservoir. The recommended brake fluid type is also listed in your owner's manual.
Pull the hood release under the dashboard of your Audi. Open the hood and secure it in the open position.
Locate the brake fluid reservoir in the engine bay near the wiper arm on driver's side.On newer Audi vehicles, the brake fluid reservoir is covered with a black plastic cover which needs to be removed to expose the brake fluid reservoir.
Look at the side of the reservoir. Check if the level is between the maximum and minimum marks on the side of the reservoir. If the brake fluid level is below the minimum level, you will need to add brake fluid.
Look at the cap of the brake fluid reservoir and determine the correct brake fluid type.
Remove cap by turing it counter-clockwise.
Add brake fluid until the level reaches just below the MAX/Full mark. Do not fill the Audi brake reservoir above the maximum mark.
Note that an Audi brake light staying on at startup can indicate a problem with the brake system but in some cases, it can be an issue with the charging system or battery.
If the voltage from the alternator or battery is too low it can trigger the brake light to stay on.
In this guide, you found instructions on how to check Audi brake fluid level and add brake fluid on most Audi models including A3, A4, S, Q3, Q5, Q7, TT.
Your Audi should not lose brake fluid regularly. If you are losing brake fluid, have the brake system checked by a mechanic immediately.
If your Audi brake warning light (or ABS light) comes on or is flashing while driving or at startup, stop and check the brake fluid level.
Driving with the brake light on can put you, your passenger and others at risk.