1998 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026
1998 · All trims · All engines
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998 Audi A6 has 7 documented known issues, with 4 rated critical. The most serious are Timing belt/tensioner failure causes catastrophic valve-piston contact ($900-$4,500 repair), Headlight-Switch Wiring Fire Recalls JC and JN ($0-$0 repair), Tie-Rod Seal Failure Recalls 99V-248 and 00V-414 ($0-$0 repair) and C5 A6 Bosch 5.3 ABS Warning or No Communication - Identify and Test Before Module Work. Across all issues with published estimates, repair costs range from $900 to $4,500. DIY maintenance guides at au7o.io.
FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY
VOLKSWAGEN IS RECALLING CERTAIN MODEL YEAR 2001-2004 AUDI A6, MODEL YEAR 2002-2003 S6 AND MODEL YEAR 2003 RS6 VEHICLES EQUIPPED WITH 4.2L ENGINES AND MANUFACTURED FROM JUNE 19, 2001, THROUGH JUNE 8, 2004. THE AGING OF THE PLASTIC MATERIAL IN THE FUEL TANK ROLLOVER VALVE COMBINED WITH BENDING STRESS FROM THE ALUMINUM VENTILATION LINE TO THE ROLLOVER VALVE NIPPLE MAY LEAD TO CRACKING OF THE NIPPLE. IF THIS HAPPENS, A FUEL LEAK MAY RESULT.
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
VOLKSWAGEN IS RECALLING 68,240 MY 2001-2004 AUDI A6 QUATTRO VEHICLES EQUIPPED WITH 2.7L, 2.8L, OR 3.0L ENGINES AND MY 2001-2005 ALLROAD QUATTRO VEHICLES EQUIPPED WITH 2.7L OR 4.2L ENGINES. THE AGING OF THE PLASTIC MATERIAL IN THE FUEL TANK ROLLOVER VALVE COMBINED WITH BENDING STRESS FROM THE ALUMINUM VENTILATION LINE TO THE ROLLOVER VALVE NIPPLE MAY LEAD TO CRACKING OF THE NIPPLE. IF THIS HAPPENS, A FUEL LEAK MAY RESULT.
ELECTRICAL SYSTEM
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH HALOGEN LOW BEAM HEADLIGHTS, CERTAIN CONNECTOR PINS IN THE HEADLIGHT SWITCH CONNECTOR COME INTO CONTACT WITH EACH OTHER CAUSING A SHORT CIRCUIT. NOTE: VEHICLES WITH XENON LOW BEAM HEADLIGHTS ARE NOT AFFECTED BECAUSE THE CIRCUIT IN THESE VEHICLES CONTAINS A FUSE, WHICH PRECLUDES EXCESSIVE CURRENT FLOW IN THE CASE OF A SHORT CIRCUIT. AUDI S6 AND S6 AVANT VEHICLES ARE ALL EQUIPPED WITH XENON LOW BEAM HEADLIGHTS AND, THEREFORE, ARE NOT LONGER AFFECTED BY THIS RECALL.
ELECTRICAL SYSTEM
ON CERTAIN PASSENGER VEHICLES, IF A DRIVER'S KNEES PUSH AGAINST THE KNEE BOLSTER (CRASH ELEMENT) LOCATED UNDER THE DASHBOARD, IT CAN CONTACT THE HEADLIGHT SWITCH WIRING HARNESS, AND AN ELECTRICAL SHORT COULD OCCUR.
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
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.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998 Audi A6 has 7 documented issues. The most frequently reported are: Timing belt/tensioner failure causes catastrophic valve-piston contact, Headlight-Switch Wiring Fire Recalls JC and JN, Tie-Rod Seal Failure Recalls 99V-248 and 00V-414. Of these, 4 are rated critical and should be addressed promptly.
The 1998 Audi A6 has 7 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 4 issues are rated critical: Timing belt/tensioner failure causes catastrophic valve-piston contact and Headlight-Switch Wiring Fire Recalls JC and JN and Tie-Rod Seal Failure Recalls 99V-248 and 00V-414 and C5 A6 Bosch 5.3 ABS Warning or No Communication - Identify and Test Before Module Work. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Audi A6 issues range from $0 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Timing belt/tensioner failure causes catastrophic valve-piston contact, typically costs $900-$4,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The 2.8L V6 (both 12V AAH in the C4 1995-1997 and 30V AHA/ATQ in the C5 starting 1998) is an interference engine, so timing belt, tensioner, idler, or hydraulic damper failure between service intervals will allow the valves to strike the pistons, bending valves and sometimes crac… Repairs typically run $900-$4,500. Severity: high.
Audi recall 04V-133 (campaign JC) covers certain 1998-2004 A6 and S6 vehicles because the headlight-switch wiring harness can contact the driver's-side crossmember area, eventually shorting and creating a fire risk in the left dashboard. Audi later issued recall 06V-198 (campaign… Repairs typically run $0-$0. Severity: high.
Certain 1998-1999 Audi A6 vehicles were included in safety recalls 99V-248 and 00V-414 for tie rods whose seals might not keep moisture and dust out of the swivel-bearing mechanism. Contamination can accelerate wear and create excessive play, reducing steering control. Clunking,… Repairs typically run $0-$0. Severity: high.
Some 1998-2001 C5 A6 configurations use Bosch 5.3 brake electronics, but Audi documents several ABS/EDL, ASR, and ESP versions with engine- and transmission-specific coding. An ABS lamp, red brake warning, wheel-speed fault, or failure to communicate with address 03 does not by i… Severity: high.
The federal Dewey settlement record identifies 1998-2005 Audi A6 C5 vehicles with the 4B platform code, including allroad, S, and RS versions, among vehicles alleged to be susceptible to passenger-compartment water ingress through sunroof drains or the fresh-air plenum. This page… Severity: medium.
Audi repair literature for the C5 2.8L AHA engine identifies a rear coolant pipe and multiple sealed cooling-system connections. Owner reports on 2.8L AHA/ATQ cars also show why a leak at the rear of the engine cannot be assigned to one O-ring from symptoms alone: coolant can esc… Severity: medium.
A C5 A6 center driver-information display can develop missing rows, segments, fading, or an unreadable image while the analog gauges and the rest of the cluster continue to operate. That display-only complaint must be separated from a whole cluster that resets, loses power, drops… Severity: low.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
