IT'S THE AUDI WET BRAKING PROBLEM. *AK
1999 Audi A4
Owner reports · Recalls · Investigations
More warning signs than most A4 years
Owner complaints for the 1999 Audi A4 are substantially higher than the model-year median of 76.5.
About this comparison →How this year compares
Owner complaints by model year
Compare all A4 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
100 reports with mileage · 90 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 81 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine And Engine Cooling. Review the 28 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Vehicle Speed Control. Review the 16 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
190 reportsUNDER WET ROAD CONDITIONS AND HARD RAIN, WHEN APPLYING BRAKES, CONSUMER HAS TO PUMP BRAKES A FEW TIMES BEFORE THERE IS ANY BRAKING ACTION. DEALER CANNOT FIND PROBLEM. *AK *SLC
PROBLEM: WHEN TEMPERATURE FALLS BELOW 38 F, RECIRCULATION BUTTON NEVER WORKS. BEING IN BOSTON THAT COVERS MOST OF THE WINTER. THE ONLY WAY NOT TO BREATHE THE FUMES IS TO TURN THE VENTILATION OFF COMPLETELY. THIS THEN SHUTS THE HEAT AS WELL. MY NEW COMMUTE TAKES ME DAILY THROUGH THE CALAHAN TUNNEL. IF OUTSIDE IS 13 F, AND I …
Read full complaint
PROBLEM: WHEN TEMPERATURE FALLS BELOW 38 F, RECIRCULATION BUTTON NEVER WORKS. BEING IN BOSTON THAT COVERS MOST OF THE WINTER. THE ONLY WAY NOT TO BREATHE THE FUMES IS TO TURN THE VENTILATION OFF COMPLETELY. THIS THEN SHUTS THE HEAT AS WELL. MY NEW COMMUTE TAKES ME DAILY THROUGH THE CALAHAN TUNNEL. IF OUTSIDE IS 13 F, AND I AM STUCK IN TRAFFIC IN THE TUNNEL FOR AN HOUR, THESE ARE MY OPTIONS: KEEP THE HEAT RUNNING UNTIL POISONED BY GAS FUMES (GARAGE ANALOGY), OR SHUT OFF HEAT UNTIL FROSTBITTEN AT 13 F. CAN THIS BE CONSIDERED A SAFETY VIOLATION? ATTEMPTED RESOLUTION: AUDI OF AMERICA'S RESPONSE WAS THAT A/C HAS TO BE TURNED ON FOR RECIRCULATION BUTTON TO BE OPERATIONAL. SINCE A/C DOES NOT WORK BELOW 38 F (THEY CITED SOME FEDERAL REGULATION) SO THE RECIRCULATION BUTTON DOES NOT AS WELL. THE DEVICE WORKS AS DESIGNED, ACCORDING TO AUDI. MY DEALER, TOM WALTON OF PARK PORSCHE AUDI, TOLD ME CONFIDENTIALLY THAT THEY HAVE CUSTOMERS WHO DID NOT WANT TO PURCHASE AUDI A4 UNTIL THESE PROBLEMS WERE SOLVED. I FILED A REPORT WITH AUDIO OF AMERICA TWICE. THERE WAS NO FOLLOW UP EITHER TIME. MEANWHILE DEALERS SERVICE DEPARTMENT INFORMED ME THAT THEY INQUIRED ABOUT THIS BEFORE AND WERE TOLD THAT DEVICE OPERATES AS DESIGNED. THE SAME YEAR I RENTED EXACTLY THE SAME VEHICLE IN GERMANY AND NOTICED THAT THERE WAS A DIFFERENT A/C ASSEMBLY INSTALLED, AND THAT RECIRCULATION BUTTON WORKED WELL IN TEMPERATURES BELOW 20 F. IN U.S., THE SAME A/C ASSEMBLY BECAME AVAILABLE WITH THE 2000 MODEL YEAR, WHERE THIS PROBLEM IS NOT PRESENT. I ASKED THE DEALER IF I COULD PAY TO HAVE THAT A/C ASSEMBLY INSTALLED BUT WAS TOLD THAT THAT WAS NOT POSSIBLE. WHEN SURFING ON THE WEB, I DISCOVERED A SIMILAR PROBLEM REPORTED BY ANOTHER OWNER WITH THE SAME VEHICLE, BUT ONLY THIS TIME THE 1997 MODEL YEAR. SO IT APPEARS THAT FOR SURE 1997-1999 MODEL YEAR A4'S HAVE A FAULTY A/C ASSEMBLY. READ MICHEAL OF LA JOLLA, CA REPORT: HTTP://WWW.CONSUMERAFFAIRS.COM/AUTOMOTIVE/AUDI.HTM. *AK
WET BRAKING PROBLEM--I HAVE NO BRAKES (DELAYED) FOR THE FIRST 2-4 SECONDS DURING, OR AFTER A RAIN.*AK
ALL I WANT TO DO IS REPORT THAT THE REAR DOORS CAN BE AJAR AND DRIVER HAS NO WARNING SYSTEM TO TELL HIM OF THE PROBLEM (SUCH AS A LIGHT OR WARNING BUZZER) I AM CONCERNED AS MY SIX YEAR OLD RIDES IN THE BACK SEET. I CONTACTED AUDI AND WAS TOLD THAT THER IS NO WARNING SYSTEM CONCERNING THE DOORS BECOMING AJAR. I FIND THIS DANGER…
Read full complaint
ALL I WANT TO DO IS REPORT THAT THE REAR DOORS CAN BE AJAR AND DRIVER HAS NO WARNING SYSTEM TO TELL HIM OF THE PROBLEM (SUCH AS A LIGHT OR WARNING BUZZER) I AM CONCERNED AS MY SIX YEAR OLD RIDES IN THE BACK SEET. I CONTACTED AUDI AND WAS TOLD THAT THER IS NO WARNING SYSTEM CONCERNING THE DOORS BECOMING AJAR. I FIND THIS DANGEROUS. *AK
IMMEDIATELY PRIOR TO SWITCHING FROM 3RD TO 4TH GEAR, THE VEHICLE LOSES R.P.M.'S AND POWER THEN CATCHES AND CHANGES GEARS. IT IS ONLY IN THIS GEAR SHIFT --3RD TO 4TH. I HAVE CONTACTED THE MANUFACTURER AND THEY SAY IT IS WITHIN DESIGN PARAMETERS. I TEST DROVE OTHER IDENTICAL CARS AND THIS PROBLEM IS NOT DETECTED. IT IS DANGERO…
Read full complaint
IMMEDIATELY PRIOR TO SWITCHING FROM 3RD TO 4TH GEAR, THE VEHICLE LOSES R.P.M.'S AND POWER THEN CATCHES AND CHANGES GEARS. IT IS ONLY IN THIS GEAR SHIFT --3RD TO 4TH. I HAVE CONTACTED THE MANUFACTURER AND THEY SAY IT IS WITHIN DESIGN PARAMETERS. I TEST DROVE OTHER IDENTICAL CARS AND THIS PROBLEM IS NOT DETECTED. IT IS DANGEROUS TO LOSE SUCH POWER, ESPECIALLY AT OR AROUND HIGHWAY MERGE SPEEDS.
IF YOU OPEN ANY WINDOW OR SUNROOF, A LOUD WIND TURBLANCE CREATS A BOOM AND DOES NOT GO AWAY UNTIL YOU CLOSE ALL WINDOWS/SUN. THIS PROBLEM IS KNOWN BY AUDI , BUT THEY DO NOT WANT TO FIX IT. THEY SAY THAT I CAN GO BUY A WIND DEFLECTOR. THIS PROBLEM HAS CAUSED MAJOR HEADACES, AND HAS DISTRACTED ME FROM THE ROAD ON MANY OCCASSIONS, …
Read full complaint
IF YOU OPEN ANY WINDOW OR SUNROOF, A LOUD WIND TURBLANCE CREATS A BOOM AND DOES NOT GO AWAY UNTIL YOU CLOSE ALL WINDOWS/SUN. THIS PROBLEM IS KNOWN BY AUDI , BUT THEY DO NOT WANT TO FIX IT. THEY SAY THAT I CAN GO BUY A WIND DEFLECTOR. THIS PROBLEM HAS CAUSED MAJOR HEADACES, AND HAS DISTRACTED ME FROM THE ROAD ON MANY OCCASSIONS, ALMOST LEADING TO AN ACCIDENT. THIS NOISE IS VERY LOUD, AND IS CLEARLY A DEFECT IN THE DESIGN OF THIS VEHICLE. I HAVE WRITTEN TO AUDI THAT THIS PROBLEM CAN LEAD TO MANY ACCIDENTS, BUT THEY DON'T CARE. I KNOW THAT MANY PEOPLE HAVE COMPLAINED TO AUDI, AND THEY KNOW ABOUT THIS. I WOULD LIKE TO SEE NHTSA TO A RECALL TO HAVE THIS PROBLEM CORRECTED BEFORE ANYONE DIES.
BRAKES HAVE A HUGE DELAY WHEN DRIVING IN WET CONDITIONS. UNLIKE ANY CAR I HAVE EVER DRIVEN. WHEN TRAVELING AT HIGHWAY SPEEDS IT CAN BE AS MUCH AS A ONE SECOND DELAY UNTIL THE BRAKES KICK IN. I HAVE CONTACTED THE DEALER AND THEY SAY THAT THIS PROBLEM CAN'T BE FIXED. MY ONLY HOPE IS THAT AUDI OF AMERICA WILL DO SOMETHING ABOUT…
Read full complaint
BRAKES HAVE A HUGE DELAY WHEN DRIVING IN WET CONDITIONS. UNLIKE ANY CAR I HAVE EVER DRIVEN. WHEN TRAVELING AT HIGHWAY SPEEDS IT CAN BE AS MUCH AS A ONE SECOND DELAY UNTIL THE BRAKES KICK IN. I HAVE CONTACTED THE DEALER AND THEY SAY THAT THIS PROBLEM CAN'T BE FIXED. MY ONLY HOPE IS THAT AUDI OF AMERICA WILL DO SOMETHING ABOUT THIS.
WHEN DRIVING AND UPON DEPRESSING BRAKE PEDAL WHEN ATTEMPTING TO STOP, EXPERIENCED COMPLETE BRAKE FAILURE WITHOUT PRIOR WARNING WHICH CAUSED EXTENDED STOPPING DISTANCE. ALSO, DIRECTIONAL SIGNAL AND EMERGENCY LIGHTS MALFUNCTIONED. *AK
UNDER WET CONDITIONS, BRAKES ARE DANGEROUSLY SLOW TO GRAB. THERE IS A NOTICEABLE AND VERY DISCONCERTING DELAY OF APPX 1-2 SECONDS. THE CONDITION IS WORSENED BY DRIVING WITHOUT BRAKING FOR DISTANCES >10 MILES. PLEASE, PLEASE, PLEASE CONTACT AUDI CONCERNING THIS PROBLEM AS IT IS WELL DOCUMENTED AND DANGEROUS TO ME AND OTHERS.*A…
Read full complaint
UNDER WET CONDITIONS, BRAKES ARE DANGEROUSLY SLOW TO GRAB. THERE IS A NOTICEABLE AND VERY DISCONCERTING DELAY OF APPX 1-2 SECONDS. THE CONDITION IS WORSENED BY DRIVING WITHOUT BRAKING FOR DISTANCES >10 MILES. PLEASE, PLEASE, PLEASE CONTACT AUDI CONCERNING THIS PROBLEM AS IT IS WELL DOCUMENTED AND DANGEROUS TO ME AND OTHERS.*AK
Official recalls
420V056000 · Air Bags:frontal:driver Side:inflator Module
Jan 31, 2020
Volkswagen Group of America, Inc. (VW) is recalling certain 2000-2001 TT Roadster, 2000 TT Coupe, 1999 Audi A8, 1998-2000 Audi A6, and 1999-2000 Audi A4 vehicles equipped with Non-Azide Driver air bag Inflators (NADI) that do not contain phase stabilized ammonium nitrate (PSAN) propellant. Due to a manufacturing issue, the NADI inflators may absorb moisture, possibly causing the air bag to deploy improperly in the event of a crash.
Consequence & remedy
Consequence: In the event of a crash necessitating air bag deployment, the air bag may not properly protect the occupant, increasing the risk of serious injury or death.
Remedy: Dealers will replace the driver frontal air bag inflator with an alternative inflator when the parts become available, free of charge. Owner notifications were mailed September 21, 2021. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 69BT.
00V414000 · Steering:linkages:rod:relay:connecting
Dec 6, 2000
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE TIE RODS OF THE STEERING ASSEMBLY ARE PROTECTED ON EACH SIDE BY A SEAL TO PREVENT MOISTURE AND DUST PARTICLES FROM ENTERING THE SWIVEL BEARING MECHANISM. IT IS POSSIBLE THAT SOME TIE ROD SEALS MAY NOT SEAL PROPERLY.
Consequence & remedy
Consequence: IF MOISTURE AND/OR DUST PARTICLES ENTER THE SWIVEL BEARING MECHANISM, THE SWIVEL BEARING COULD WEAR OVER TIME DIMINISHING THE STEERING CONTROL OF THE VEHICLE.
Remedy: DEALERS WILL REPLACE THE TIE RODS.
99V248000 · Steering:linkages:rod:relay:connecting
Sep 13, 1999
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE TIE RODS OF THE STEERING ASSEMBLY ARE PROTECTED ON EACH SIDE BY A SEAL TO PREVENT MOISTURE AND DUST PARTICLES FROM ENTERING THE SWIVEL BEARING MECHANISM. IT IS POSSIBLE THAT SOME TIE ROD SEALS MAY NOT SEAL PROPERLY.
Consequence & remedy
Consequence: IF MOISTURE AND/OR DUST PARTICLES ENTER THE SWIVEL BEARING MECHANISM, THE SWIVEL BEARING COULD WEAR OVER TIME DIMINISHING THE STEERING CONTROL OF THE VEHICLE.
Remedy: DEALERS WILL REPLACE THE TIE RODS.
99V131001 · Service Brakes, Hydraulic:power Assist:vacuum:hoses, Lines/piping, And Fittings
May 21, 1999
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 & remedy
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.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
5EA04017 · STUCK-OPEN Throttle
Opened Jun 30, 2004 · Closed Feb 10, 2005
Status: closed (inferred from source dates) · Fuel System, Gasoline:fuel Injection System
VWOA HAS RECALLED APPROXIMATELY 28,300 MY 1998-99 A6 VEHICLES IN COLD WEATHER STATES THAT EXPERIENCED THE HIGHEST RATE OF THROTTLE ICING INCIDENTS IN THE SUBJECT VEHICLES (04V-495).THE FAILURE RATE IN THE A4 AND PASSAT VEHICLES IS MUCH LOWER THAN IN THE RECALLED VEHICLES.ODI WILL CONTINUE TO MONITOR THE EXPERIENCE IN THE A4 AND PASSAT VEHICLES.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT NO SAFETY-RELATED DEFECT EXISTS FOR THE AUDI A4 OR VW PASSAT VEHICLES.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHER ACTION IF WARRANTED BY A CHANGE IN CIRCUMSTANCES. FOR FURTHER DETAILS SEE THE ATTACHED CLOSING REPORT.
PE02008 · Brake And Clutch Pedal Bracket
Opened Jan 23, 2002 · Closed Jul 12, 2002
Status: closed (inferred from source dates) · Service Brakes, Hydraulic
No summary supplied.
EA00021 · Degraded Braking In Wet Weather
Opened Aug 11, 2000 · Closed Mar 29, 2002
Status: closed (inferred from source dates) · Service Brakes, Hydraulic
There is no summary currently available
PE00016 · Degraded Braking Wet Weather Condition
Opened Apr 4, 2000 · Closed Aug 11, 2000
Status: closed (inferred from source dates) · Electrical System
There is no summary currently available
RQ99008 · Power Brake Booster Vacuum BY-PASS
Opened Jun 1, 1999 · Closed Nov 14, 2000
Status: closed (inferred from source dates) · Service Brakes, Hydraulic
There is no summary currently available
Illustration