Vehicle recall 99V131001 · May 21, 1999
Audi A4, Audi A6 and 1 more model
Vehicle description: passenger vehicles equipped with automatic transmissions.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Vehicle description: passenger vehicles equipped with automatic transmissions. A control valve in the vacuum hose connecting the brake booster to the intake manifold may not open or close fully at temperatures below -4 f under certain driving conditions.
- Consequence
- This condition could cause insufficient vacuum to be provided to the brake booster.
- Remedy
- Dealers will install a vacuum by-pass system into vehicles operated in these states which is designed to provide sufficient vacuum for full brake assist under all weather conditions.
- Notes
- Owner notification began October 9, 1999.OWNERS who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact VW at 1-800-822-8987 or Audi at 1-800-822-2834.ALSO contact the national highway traffic safety administration's auto safety hotline at 1-888-dash-2-dot (1-888-327-4236).
Recall details
- NHTSA campaign
- 99V131001
- Reported to NHTSA
- May 21, 1999
- Filed by
- VOLKSWAGEN OF AMERICA,INC
- Manufacturer campaign
- UH/KU
- Owner notification
- October 9, 1999
- Vehicles potentially affected
- 88,121
- Initiated by
- NHTSA’s Office of Defects Investigation
- Components
- Service brakes, hydraulic › Power assist › Vacuum › Hoses, lines/piping, and fittings
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
Has your Audi been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Audi dealer can also check your VIN. Recall repairs are free.