# NHTSA recall 99V131001

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 99V131001
- Manufacturer's number: UH/KU
- Manufacturer: VOLKSWAGEN OF AMERICA,INC
- Reported: 1999\-05\-21
- Owners notified: 1999\-10\-09
- Component: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM:HOSES, LINES/PIPING, AND FITTINGS
- Units potentially affected: 88121

## What is wrong

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.


## What can happen

THIS CONDITION COULD CAUSE INSUFFICIENT VACUUM TO BE PROVIDED TO THE BRAKE BOOSTER.


## The 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 \(1\-888\-327\-4236\).


## Vehicles this campaign lists

- [1997 AUDI A4](/makes/audi/a4/1997/recalls.md). Built 1997\-10\-01 to 1999\-02\-28.
- [1998 AUDI A4](/makes/audi/a4/1998/recalls.md). Built 1997\-10\-01 to 1999\-02\-28.
- [1999 AUDI A4](/makes/audi/a4/1999/recalls.md). Built 1997\-10\-01 to 1999\-02\-28.
- [1998 AUDI A6](/makes/audi/a6/1998/recalls.md). Built 1997\-10\-01 to 1999\-02\-28.
- [1999 AUDI A6](/makes/audi/a6/1999/recalls.md). Built 1997\-10\-01 to 1999\-02\-28.
- [1998 VOLKSWAGEN PASSAT](/makes/volkswagen/passat/1998/recalls.md). Built 1997\-10\-01 to 1999\-02\-28.
- [1999 VOLKSWAGEN PASSAT](/makes/volkswagen/passat/1999/recalls.md). Built 1997\-10\-01 to 1999\-02\-28.

## Investigated as RQ99008

This recall followed 1 NHTSA investigation. An investigation is NHTSA looking into a possible defect. It is not a finding that a defect exists, and it does not say that any one vehicle is affected.

- RQ99008: Recall query, opened 1999\-06\-01, closed 2000\-11\-14. POWER BRAKE BOOSTER VACUUM BY\-PASS. SERVICE BRAKES, HYDRAULIC.

From NHTSA's investigation file, as of 2026-10-19. JSON: [/v1/recalls/nhtsa/99V131001/investigations](/v1/recalls/nhtsa/99V131001/investigations)

## Bulletins for the same vehicles and component

A bulletin is the manufacturer's note to its dealers. It is not part of this recall.

- [TT450654](/bulletins/10238620.md), 2023-07-05, Service bulletin
- [TT230628](/bulletins/10238568.md), 2023-07-05, Service bulletin
- [TT 45\-06\-54](/bulletins/10157760.md), 2019-04-08, Service bulletin
- [TT 45\-06\-54](/bulletins/10156161.md), 2019-04-01, Service bulletin
- [TT45\-06\-54](/bulletins/10070773.md), 2016-06-13, Service bulletin
- [TT\-45\-06\-54](/bulletins/10051242.md), 2013-02-26, Service bulletin
- [TSB\-45\-08\-04](/bulletins/10028008.md), 2009-02-27, Service bulletin
- [0517](/bulletins/10016037.md), 2005-08-19, Service bulletin

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/99V131001](/v1/recalls/nhtsa/99V131001)

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