Audi Brake Light ON, Check Add Brake Fluid Level

Audi Brake Light ON, Check Add Brake Fluid Level

Last Updated on Monday Mar 12, 2018

If the brake warning light (and ABS light) come on or are flashing while driving or at startup, stop immediately and check the brake fluid level. If the brake fluid level on your Audi is below the minimum, you need to add Audi brake fluid before you start driving. If Audi brake light stays on do not drive the car as you may not have working brakes. Double check the parking brake making sure it is fully released. Also, note that an intermittent Audi brake light staying on at startup can indicate a problem 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 will find instructions on how to check level and add brake fluid on most Audi models including  A3, A4, S, Q3, Q5, Q7, TT. Common symptoms that you need brake fluid include the brake warning light staying on even when you start your Audi. 

If the brake level is low add recommended Audi brake fluid immediately. Only use brake fluid noted on the cap of your Audi A S Q TT models brake fluid reservoir or owners manual. These instructions apply to 1995-2020 Audi A S Q TT models such as A3, S3, RS3, A4, S4, A5, S5, A6, S6, A7, S7, RS7, A8, S8, Q3, Q5, SQ5, Q7, TT, R8 .

Below you will find step by step directions and video clips to help you add brake fluid to your Audi. 


  • Low Brake Fluid Warning
  • Brake Light On
  • The brake pedal is soft.
  • Brake pedal can be pressed all the way
  • ABS light stays on or flashing

What you will need


Step 1 - Open Hood

Pull the hood release under the dashboard of your Audi. Open the hood and secure it in the open position.

Step 2 - Locate Brake Fluid Reservoir

how to add brake fluid on Audi A3, S3, RS3, A4, S4, A5, S5, A6, S6, A7, S7, RS7, A8, S8, Q3, Q5, SQ5, Q7, TT, R8

Locate the brake fluid reservoir on your Audi A S Q TT models . Clean the brake fluid reservoir with a clean cloth.

Step 3 - Determine Low/Max level

How to Add brake fluid to Audi A S Q TT models  2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

Check the current fluid level. Ensure the current brake fluid levelis between the maximum and minimum marks on the side of the reservoir. If the brake fluid level is below the minimum level, continue to the next step.

Step 4 - Add Brake Fluid

Look at the cap of the brake fluid reseroivr to deterine the correct brake fluid type. Add brake fluid until the level reaches just below the MAX/Full mark. Do not fill Audi brake reservoir above the maximum mark.

  • If the brake fluid level is OK, the fault in the brake system may have been caused by a failure of the ABS control function.
  • If air enters your brake lines, the vehicle will be difficult to stop. 
  • If the brake warning light flashes, it indicates there is a major problem with the brake system. 
  • Driving with the BRAKE light on can increase the risk of fatal accident. 
  • A fault code may be stored in the brake module or ABS module if the brake fluid level is low. 
  • Brake fluid level is monitored electronically. 
  • It is normal for the brake fluid level to drop slightly to compensate for brake pad wear. The level will rise again when brake pads are replaced. This is normal.
  • The brake fluid level should never drop below the MIN mark or drop in a short time. 
  • Do not spill brake fluid on the paint or body of your vehicle. Brake fluid will damage the paint. 
  • Only use new brake fluid. Water (moisutre) in the brake fluid can cause corrosion in the brake system over time. 
  • Always use the recommended brake fluid type. 
  • Brake fluid is poisonous. Store it in a sealed original container. 
  • Keep brake fluid out of reach of children. 
  • Always dispose the brake fluid properly and comply with local laws.