This is the engine that made the VW-Audi oil sludge affair famous.
Applies to the engine AGU, AUM, AUQ.
1998–2005. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Rudolf Stricker / CC BY-SA 3.0
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 AGU, AUM, AUQ.
A machining fault is known on the Mk4 gearbox casing: material can pass through the bellhousing, and the gearbox oil runs onto the clutch.
It can affect every car in this generation.
The PD (pump injector) unit is held in the cylinder head by a single side bolt.
Applies to the engine AJM, ARL, ASZ 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 MQ200, MQ250.
The high pressure fuel pump is driven by the camshaft through a cam follower.
Applies to the engine BAD.
The internal springs of the flywheel tire, and the two discs knock against each other.
Applies to the engine ALH, AGR, AHF and 7 more.
With direct injection the fuel does not wash the intake valves: the petrol goes into the cylinder, not behind the valve.
Applies to the engine BAD.
The PD injectors (on the 1.4, 1.9 and 2.0 TDI alike) are driven by the camshaft itself, against more than 2,000 bar.
Applies to the engine AJM, ARL, ASZ and 3 more.
4 more faults belong to this generation. On the version page, only the ones that apply stay.
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: 24 May 2006
06V183000EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCHEXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH24 May 2006 · NHTSA (USA)ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH AUTOMATIC OR MANUAL TRANSMISSIONS AND CRUISE CONTROLS, A BRAKE LIGHT SWITCH ON THESE VEHICLES MAY MALFUNCTION IF IT WAS INSTALLED INCORRECTLY DURING SAFETY RECALLS 03V-265 OR 04V-096.
Risk: THE BRAKE LIGHTS COULD BECOME INOPERATIVE, OR REMAIN ON. FAILURE TO PROVIDE THE PROPER SIGNAL WHEN BRAKING COULD LEAD TO A CRASH WITHOUT WARNING.
Remedy: DEALERS WILL INSTALL THE NEWLY DESIGNED BRAKE LIGHT SWITCH FREE OF CHARGE. THE RECALL BEGAN ON NOVEMBER 27, 2006. VEHICLES WITHIN THE MAKE, MODEL, AND MODEL YEAR OF THIS POPULATION MAY BE INVOLVED IN EITHER THIS RECALL OR 06V-183, BUT NOT BOTH. THE REMEDY IS THE SAME FOR EACH RECALL. VOLKSWAGEN DEALERS WILL APPLY THE REMEDY BASED ON THE VIN NUMBER OF THE VEHICLE. OWNERS MAY CONTACT VW AT 1-800-822-8987.
04V096000EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCHEXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH20 February 2004 · NHTSA (USA)ON CERTAIN PASSENGER VEHICLES, A BRAKE LIGHT SWITCH ON THESE VEHICLES MAY MALFUNCTION.
Risk: IF THIS HAPPENS, THE BRAKE LIGHTS COULD BECOME INOPERATIVE, OR COME ON AND STAY ON, EVEN THOUGH THE VEHICLE IS PARKED.
Remedy: THIS RECALL HAS BEEN SUPERCEDED BY 06V-183. OWNERS WHO HAVE HAD A REMEDY PERFORMED UNDER THIS RECALL SHOULD RETURN TO THEIR DEALER FOR THE REDESIGNED REMEDY. OWNERS SHOULD CONTACT VOLKSWAGEN AT 1-800-822-8987.
99V251000STRUCTURE:FRAME AND MEMBERSSTRUCTURE:FRAME AND MEMBERS17 September 1999 · NHTSA (USA)VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THESE VEHICLES DO NOT COMPLY WITH THE HEAD INJURY CRITERION REQUIREMENTS OF FMVSS NO. 201, "OCCUPANT PROTECTION IN INTERIOR IMPACT." THE UPPER RETAINER CLIP NEAR THE BP1 IMPACT LOCATION IS DESIGNED TO BREAK WHEN IMPACTED BY THE HEAD FORM. IN SOME CASES, THE MATERIAL OF THE TRIM PART MAY BE MORE IMPACT RESISTANT AS A RESULT OF VARIATIONS IN THE MOLDING PROCESS.
Risk: THIS CONDITION COULD PREVENT THE CLIP FROM BREAKING ON IMPACT AND RESULT IN LESS DEFORMATION IN THE IMPACTED AREA AND A HIGHER DECLERATION OF THE HEAD FORM, INCREASING THE RISK OF PERSONAL INJURY IN THE EVENT OF A CRASH.
Remedy: DEALERS WILL REMOVE THE TRIM COVER FROM EACH OF THE B PILLARS AND INSTALL A NEW COVER.
Engines and transmissions in this generation
A fault is often tied to the engine, not to the whole generation. You find the engine code in the registration document.
I · 1998–2005
The fault list opens on the version page.
141 versions
1.4 l · 1390 cm³
AHW · AKQ
1.4 16V
1998–2005
1.4 l · 1390 cm³
BCA · AHW
1.4 16V Comfortline
1998–2005 · Comfortline
1.4 l · 1390 cm³
AHW · AKQ
1.4 16V Trendline
1998–2005 · Trendline
1.6 l · 1595 cm³
AEH · AKL · MQ200
1.6
1998–2005
1.6 l · 1595 cm³
AEH · AKL
1.6
1998–2005
1.6 l · 1595 cm³
APF · AEH
1.6 Comfortline
1998–2005 · Comfortline
1.6 l · 1595 cm³
AEH · AKL · MQ200
1.6 Comfortline
1998–2005 · Comfortline
1.6 l · 1595 cm³
AEH · AKL
1.6 Highline
1998–2005 · Highline
1.6 l · 1595 cm³
AEH · AKL · MQ200
1.6 Highline
1998–2005 · Highline
1.6 l · 1595 cm³
APF · AEH
1.6 Trendline
1998–2005 · Trendline
1.6 l · 1595 cm³
AEH · AKL · MQ200
1.6 Trendline
1998–2005 · Trendline
1.6 l · 1595 cm³
AVU · BFQ
1.6
1998–2005
1.6 l · 1595 cm³
AVU · BFQ
1.6 Athene
1998–2005 · Athene
1.6 l · 1595 cm³
AVU · BFQ
1.6 Comfortline
1998–2005 · Comfortline
1.6 l · 1595 cm³
AVU · BFQ
1.6 Highline
1998–2005 · Highline
1.6 l · 1595 cm³
AVU · BFQ
1.6 Sportline
1998–2005 · Sportline
1.6 l · 1595 cm³
AVU · BFQ
1.6 Trendline
1998–2005 · Trendline
1.6 l · 1595 cm³
AVU · BFQ
1.6 Turijn
1998–2005 · Turijn
1.6 l · 1598 cm³
ATN · AUS · MQ200
1.6 16V
1998–2005
1.6 l · 1598 cm³
ATN · AUS · MQ200
1.6 16V Athene
1998–2005 · Athene
1.6 l · 1598 cm³
ATN · AUS · MQ200
1.6 16V Comfortline
1998–2005 · Comfortline
1.6 l · 1598 cm³
ATN · AUS · MQ200
1.6 16V Highline
1998–2005 · Highline
1.6 l · 1598 cm³
ATN · AUS · MQ200
1.6 16V Sportline
1998–2005 · Sportline
1.6 l · 1598 cm³
ATN · AUS · MQ200
1.6 16V Trendline
1998–2005 · Trendline
1.6 l · 1598 cm³
ATN · AUS · MQ200
1.6 16V Turijn
1998–2005 · Turijn
1.6 l · 1598 cm³
BAD · MQ200
1.6 16V FSI
1998–2005
1.6 l · 1598 cm³
BAD · MQ200
1.6 16V FSI Athene
1998–2005 · Athene
1.6 l · 1598 cm³
BAD · MQ200
1.6 16V FSI Comfortline
1998–2005 · Comfortline
1.6 l · 1598 cm³
BAD · MQ200
1.6 16V FSI Highline
1998–2005 · Highline
1.6 l · 1598 cm³
BAD · MQ200
1.6 16V FSI Sportline
1998–2005 · Sportline
1.6 l · 1598 cm³
BAD · MQ200
1.6 16V FSI Turijn
1998–2005 · Turijn
1.8 l · 1781 cm³
AGN · MQ200
1.8 5V 4Motion
1998–2005 · 5V 4Motion
1.8 l · 1781 cm³
AGN · MQ200
1.8 5V 4Motion Comfortline
1998–2005 · 5V 4Motion Comfortline
1.8 l · 1781 cm³
AGN · MQ200
1.8 5V 4Motion Trendline
1998–2005 · 5V 4Motion Trendline
1.8 l · 1781 cm³
AGU · ARX · MQ250
1.8 5V Turbo Highline
1998–2005 · 5V Turbo Highline
1.8 l · 1781 cm³
AGU · ARX · MQ250
1.8 5V Turbo Highline
1999–2004 · 5V Turbo Highline
1.8 l · 1781 cm³
AGU · ARX
1.8 5V Turbo Highline
1998–2005 · 5V Turbo Highline
1.8 l · 1781 cm³
AGU · ARX
1.8 5V Turbo Highline
1999–2004 · 5V Turbo Highline
1.8 l · 1781 cm³
AGU · ARX · MQ250
1.8 5V Turbo Sportline
1998–2005 · 5V Turbo Sportline
1.9 l · 1896 cm³
AGP · AQM · MQ200
1.9 SDI
1998–2005
1.9 l · 1896 cm³
AGP · AQM · MQ200
1.9 SDI Comfortline
1998–2005 · Comfortline
1.9 l · 1896 cm³
AGP · AQM · MQ200
1.9 SDI Trendline
1998–2005 · Trendline
1.9 l · 1896 cm³
AGR · ALH
1.9 TDI 90hp
1998–2005
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp
1998–2005
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp 4Motion
1998–2005
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp 4Motion Comfortline
1998–2005 · Comfortline
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp 4Motion Highline
1998–2005 · Highline
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp 4Motion Trendline
1998–2005 · Trendline
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp Comfortline
1998–2005 · Comfortline
1.9 l · 1896 cm³
AGR · ALH
1.9 TDI 90hp Comfortline
1998–2005 · Comfortline
1.9 l · 1896 cm³
AGR · ALH
1.9 TDI 90hp Highline
1998–2005 · Highline
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp Highline
1998–2005 · Highline
1.9 l · 1896 cm³
AGR · ALH · MQ250
1.9 TDI 90hp Trendline
1998–2005 · Trendline
1.9 l · 1896 cm³
AGR · ALH
1.9 TDI 90hp Trendline
1998–2005 · Trendline
1.9 l · 1896 cm³
ATD · AXR · MQ250
1.9 TDI 100hp
1998–2005
1.9 l · 1896 cm³
ATD · AXR
1.9 TDI 100hp
1998–2005
1.9 l · 1896 cm³
ATD · AXR · MQ250
1.9 TDI 100hp Athene
1998–2005 · Athene
1.9 l · 1896 cm³
ATD · AXR
1.9 TDI 100hp Athene
1998–2005 · Athene
1.9 l · 1896 cm³
ATD · AXR · MQ250
1.9 TDI 100hp Comfortline
1998–2005 · Comfortline
1.9 l · 1896 cm³
ATD · AXR
1.9 TDI 100hp Comfortline
1998–2005 · Comfortline
Neighbouring generations
I. If the listing is from the changeover year, look at the neighbour too.
Previous generation
This is the earliest.
This generation
I · 1998–2005
Next generation
This is the latest.
Common questions
1998–2005. 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.