This is the engine that made the VW-Audi oil sludge affair famous.
Applies to the engine AUM, AUQ, APX and 3 more.
1998–2006. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Mhueltner / CC BY-SA 4.0
What to watch for
The list covers the generation, the engines and the transmissions. Once you pick the version, only the faults that apply to it stay.
This is the engine that made the VW-Audi oil sludge affair famous.
Applies to the engine AUM, AUQ, APX and 3 more.
The light, magnesium cased MQ200 and the MQ250, sized for higher torque, are the most widespread manual gearboxes in the transverse engine VAG models.
Applies to the transmission MQ250.
The Aisin automatic of the transverse engine VAG models locks the torque converter across a wide slip range, which gains on fuel consumption but loses on the life of the friction lining.
Applies to the transmission AQ250.
The G62 sensor tells the engine control unit how hot the coolant is.
Applies to the engine AUM, AUQ, AJQ and 8 more.
From the late nineties to around 2006, petrol engines used a secondary air pump to blow fresh air into the exhaust on a cold start, so the catalytic converter reaches operating temperature faster.
Applies to the engine AUM, AUQ, AJQ and 4 more.
The manufacturer fixes these for free at a franchised dealer. Ask with the VIN whether it was done. The list covers the whole generation. We did not filter it by model year. Some apply only to a narrower production window.
Most recent: 22 October 2021
A12/01579/21Safety recallInjuries22 October 2021 · EU Safety GateThe functioning of the relevant NADI airbags manufactured by Takata, in particular the gas generator, may be impaired in the vehicles concerned due to the age of the device. In such cases, the protective function of the driver airbag may be reduced when the airbag is activated. The product does not comply with the requirements laid down in the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: 22/10/2021
21V470000AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULEAIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE23 June 2021 · NHTSA (USA)Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2000-2001 Audi TT Coupe, TT Roadster, 2000-2002 A4, and S4 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.
Risk: 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 airbag inflator with an alternative inflator, free of charge. Owner notification letters were mailed November 2, 2021. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 69CJ.
20V056000AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULEAIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE31 January 2020 · NHTSA (USA)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.
Risk: 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.
04V007000POWER TRAIN:CLUTCH ASSEMBLYPOWER TRAIN:CLUTCH ASSEMBLY6 January 2004 · NHTSA (USA)ON CERTAIN PASSENGER VEHICLES WITH DIRECT SHIFT GEARBOX, DURING THE PRODUCTION OF THE GEARBOX, A SEAM AT THE CLUTCH WAS NOT WELDED TO SPECIFICATIONS. THIS COULD LEAD TO DEGRADED PERFORMANCE OF THE CLUTCH INSIDE THE GEARBOX.
Risk: THE CLUTCH COULD LOSE ITS ABILITY TO PROVIDE INPUT TORQUE TO THE TRANSMISSION WITHOUT PRIOR WARNING, WHICH COULD ALLOW THE VEHICLE TO ROLL, INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL REPLACE THE CLUTCH. OWNER NOTIFICATION BEGAN ON APRIL 30, 2004. OWNERS SHOULD CONTACT AUDI AT 1-800-822-2834.
01V325000SUSPENSION:REARSUSPENSION:REAR10 October 2001 · NHTSA (USA)VEHICLE DESCRIPTION: PASSENGER VEHICLES. MOISTURE COULD ENTER THE REAR TRACK CONTROL ARM'S MOUNTING BUSHING AND BOLT COMBINATION AND CAUSE CORROSION.
Risk: CORROSION COULD IMPEDE THE FREE MOVEMENT OF THE CONTROL ARM.
Remedy: DEALERS WILL REPLACE THE TRACK CONTROL ARMS. OWNER NOTIFICATION BEGAN APRIL 12, 2002. 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 AUDI AT 1-800-822-2834.
99V300000SUSPENSION:FRONT:CONTROL ARM:LOWER ARMSUSPENSION:FRONT:CONTROL ARM:LOWER ARM10 November 1999 · NHTSA (USA)PASSENGER VEHICLES. IN SHARP HIGH SPEED TURNS OR ABRUPT LANE CHANGE MANEUVERS AT SPEEDS SUBSTANTIALLY ABOVE POSTED SPEED LIMITS, AND DEPENDING UPON ROAD CONDITIONS, PRECISE STEERING RESPONSE MAY BE DEMANDED TO RETAIN DIRECTIONAL STABILITY.
Risk: IN THE EVENT CONTROL IS LOST, A CRASH MAY OCCUR RESULTING IN INJURY.
Remedy: DEALERS WILL REPLACE THE FRONT STABILIZERS IN FRONT DRIVE AUDI TT'S AND THE FRONT AND REAR STABILIZERS IN AUDI TT'S EQUIPPED WITH QUATTRO DRIVE. A MODIFIED CONTROL ARM WILL BE INSTALLED IN FRONT TOGETHER WITH FIRMER SHOCK ABSORBERS IN FRONT AND REAR. IN ADDITION AUDI WILL INSTALL A REAR SPOILER.
99V222000FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGSFUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS12 August 1999 · NHTSA (USA)VEHICLE DESCRIPTION: PASSENGER VEHICLES. A SMALL SECTION OF THE VEHICLE FUEL LINE ASSEMBLY MAY HAVE BEEN DAMAGED DURING PRODUCTION. IF DAMAGED, FUEL COULD LEAK TO THE OUTSIDE.
Risk: IN THE PRESENCE OF AN IGNITION SOURCE, CAUSE A FIRE.
Remedy: DEALERS WILL REPLACE THE FUEL LINE ASSEMBLY.
A12/00849/20Safety recallInjuriesno date · EU Safety GateAudi has been informed by its current supplier that driver-airbag gas generators from the original manufacturer Takata (‘NADI’ (non-azide driver inflator) generators) produced during 1997-1999 may be faulty. Internal investigations have shown that in the event of an accident the restraining effect of the deployed driver airbag might not always be fully guaranteed. Compliance with the statutory requirements in force for protection by an airbag in the event of an accident is thus not ensured. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
8N · 1998–2006
The fault list opens on the version page.
32 versions
1.8 l · 1781 cm³
AUM · MQ250
1.8 5V Turbo 150hp
1998–2006 · 5V Turbo 150hp
1.8 l · 1781 cm³
AUM · MQ250
1.8 5V Turbo 150hp
1999–2006 · 5V Turbo 150hp
1.8 l · 1781 cm³
BVP · MQ250
1.8 5V Turbo 163hp
1998–2006 · 5V Turbo 163hp
1.8 l · 1781 cm³
BVP · MQ250
1.8 5V Turbo 163hp
1999–2006 · 5V Turbo 163hp
1.8 l · 1781 cm³
BVP · MQ250
1.8 5V Turbo 163hp Advance
1999–2006 · 5V Turbo 163hp Advance
1.8 l · 1781 cm³
BVP · MQ250
1.8 5V Turbo 163hp Advance
1998–2006 · 5V Turbo 163hp Advance
1.8 l · 1781 cm³
AJQ · APP · MQ250
1.8 5V Turbo 180hp
1998–2006 · 5V Turbo 180hp
1.8 l · 1781 cm³
AJQ · APP · AQ250
1.8 5V Turbo 180hp
1998–2006 · 5V Turbo 180hp
1.8 l · 1781 cm³
AJQ · APP · AQ250
1.8 5V Turbo 180hp
1999–2006 · 5V Turbo 180hp
1.8 l · 1781 cm³
AJQ · APP · MQ250
1.8 5V Turbo 180hp
1999–2006 · 5V Turbo 180hp
1.8 l · 1781 cm³
AJQ · APP · MQ250
1.8 5V Turbo quattro 180hp
1998–2006 · 5V Turbo quattro 180hp
1.8 l · 1781 cm³
APP · AJQ · MQ250
1.8 5V Turbo quattro 180hp
1999–2006 · 5V Turbo quattro 180hp
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp
1999–2006 · 5V Turbo 190hp
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp
1999–2006 · 5V Turbo 190hp
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp
1998–2006 · 5V Turbo 190hp
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp
1998–2006 · 5V Turbo 190hp
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp Advance
1998–2006 · 5V Turbo 190hp Advance
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp Advance
1998–2006 · 5V Turbo 190hp Advance
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp Advance
1999–2006 · 5V Turbo 190hp Advance
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo 190hp Advance
1999–2006 · 5V Turbo 190hp Advance
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo quattro 190hp
1998–2006 · 5V Turbo quattro 190hp
1.8 l · 1781 cm³
no engine code
1.8 5V Turbo quattro 190hp
1999–2006 · 5V Turbo quattro 190hp
1.8 l · 1781 cm³
BAM · BEA · MQ350
1.8 5V Turbo quattro 225hp
1998–2006 · 5V Turbo quattro 225hp
1.8 l · 1781 cm³
APX · BAM · MQ350
1.8 5V Turbo quattro 225hp
1999–2006 · 5V Turbo quattro 225hp
3.2 l · 3189 cm³
BHE · MQ350
3.2 quattro
1998–2006 · quattro
3.2 l · 3189 cm³
BHE · MQ350
3.2 quattro
1999–2006 · quattro
3.2 l · 3189 cm³
BHE
3.2 quattro
1999–2006 · quattro
3.2 l · 3189 cm³
BHE
3.2 quattro
1998–2006 · quattro
3.2 l · 3189 cm³
BHE · MQ350
3.2 quattro Advance
1998–2006 · quattro Advance
3.2 l · 3189 cm³
BHE
3.2 quattro Advance
1999–2006 · quattro Advance
3.2 l · 3189 cm³
BHE · MQ350
3.2 quattro Advance
1999–2006 · quattro Advance
3.2 l · 3189 cm³
BHE
3.2 quattro Advance
1998–2006 · quattro Advance
Neighbouring generations
8N (1998-2006). If the listing is from the changeover year, look at the neighbour too.
Common questions
1998–2006. The changeover year can fall in two generations. If the listing is from that year, look at the neighbour too.
No. It depends on the engine and the transmission too.
The fault list is.
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.