1998-1999 Audi A6 Brake Vacuum Recall
A recall (NHTSA ID: 99V131001) has been issued for certain 1998-1999 Audi A6 vehicles equipped with automatic transmissions. The issue involves a control valve in the brake vacuum hose that may not function correctly in temperatures below -4°F, potentially leading to insufficient brake assist.

Also applies to
- Audi A6
- 1998
Why This Matters
This recall addresses a critical safety concern related to the vehicle's braking system. If the control valve in the vacuum hose fails to operate correctly, it can result in insufficient vacuum being supplied to the brake booster. This condition could reduce the effectiveness of the power brake assist, requiring more effort from the driver to stop the vehicle and increasing the risk of a crash.
What's Being Recalled
This recall, NHTSA ID: 99V131001, affects 1998-1999 Audi A6 passenger vehicles equipped with automatic transmissions. The specific component at fault is a control valve located in the vacuum hose that connects the brake booster to the intake manifold. Under certain driving conditions, particularly at temperatures below -4°F, this valve may not open or close fully.
How to Check if Your Vehicle is Affected
This 1999 Audi A6 recall applies to specific 1998 and 1999 Audi A6 models with automatic transmissions. To confirm if your vehicle is included in this recall, you should contact an authorized Audi dealer with your Vehicle Identification Number (VIN). You can also check the NHTSA recall website using your VIN.
Manufacturer's Remedy
Audi dealers will install a vacuum by-pass system in affected vehicles that are operated in states prone to cold temperatures. This new system is designed to ensure sufficient vacuum is consistently provided to the brake booster, guaranteeing full brake assist under all weather conditions. This repair will be performed free of charge to the owner.
Owner notification for this 1999 Audi A6 recall began on October 9, 1999.
Important Warnings for Owners
If you take your vehicle to an authorized dealer on an agreed-upon service date and do not receive the free remedy within a reasonable timeframe, you should contact Volkswagen of America at 1-800-822-8987 or Audi at 1-800-822-2834. You can also contact the National Highway Traffic Safety Administration's Auto Safety Hotline at 1-888-DASH-2-DOT (1-888-327-4236) for assistance.
Source: NHTSA Recall ID: 99V131001
Frequently Asked Questions
- What is the specific problem addressed by the 1999 Audi A6 recall?
- The recall (NHTSA ID: 99V131001) addresses a control valve in the brake vacuum hose that may not operate correctly in temperatures below -4°F, potentially leading to insufficient vacuum for the brake booster and reduced power brake assist in 1998-1999 Audi A6 models with automatic transmissions.
- What are the potential consequences of this brake vacuum issue?
- If the brake booster does not receive sufficient vacuum, the power assist for the brakes will be reduced. This means a driver would need to apply more force to the brake pedal to stop the vehicle, increasing the risk of a crash.
- How will Audi fix the problem in affected vehicles?
- Audi dealers will install a vacuum by-pass system. This system is designed to ensure that the brake booster receives adequate vacuum for full brake assist, regardless of temperature conditions. This repair will be performed at no cost to the owner.
- How can I confirm if my 1999 Audi A6 is part of this recall?
- You can verify if your 1998 or 1999 Audi A6 is affected by contacting an authorized Audi dealer with your VIN, or by checking the NHTSA website using your vehicle's VIN. Owner notification for this recall began on October 9, 1999.
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