Audi carsCode 8E
Audi A4 B6 problems (2000–2004)
All 1 engine and 1 gearbox of the Audi A4 B6 that we have documented have high or critical severity faults: the Multitronic gearbox and the 1.8 T 20v. None has a «Buy» verdict; the safest option is the 1.8 T 20v, with a «With caution» verdict.[1][2]
Outside the engine: The Audi A4 B6 (Typ 8E), built between 2000 and 2004, shares almost all of its documented non-engine faults with the later B7: fiches-auto.fr describes breakages of the aluminium front suspension arms on 1.9 TDI versions, early clutch and dual-mass flywheel wear on diesels, and frequent failures of the electric window regulators, along with two recalls in 2002 and 2003 over the handbrake cable and the rear brake hose.[3][4]
Audi A4 B6 rating: acceptable reliability
Calculated using only 12 documented faults and their sources: the most serious and frequent faults weigh more. Limited evidence: it is based on few sources or few documented faults, so it is not included in the rankings. Having few documented faults does not mean it is reliable: it may simply be little studied. How it is calculated
- Engine6.85 faults
- Gearbox5.7Manual: 7.9 · Multitronic: 3.6
- Suspension7.91 fault and ITV (technical inspection)
- Brakes7.01 fault and ITV (technical inspection)
- Tyres and wheels10.0No documented faults
- Steering8.4Technical inspection (ITV) only: 0.6 times the defects normal for its age
- Electrical system8.91 fault
- Headlights and lights7.7Technical inspection (ITV) only: 0.9 times the defects normal for its age
- Electronics and infotainment10.0No documented faults
- Climate control10.0No documented faults
- Bodywork and interior8.3Technical inspection (ITV) only: 0.7 times the defects normal for its age
- Airbags and safety10.0No documented faults
The weak points of the Audi A4 B6
- 1Critical severity: Wear of the variator chain and conesMultitronic gearbox
- 2High severity: Control unit (TCU) failure and limp modeMultitronic gearbox
- 3Critical severity: Recalls for the rear brake hose and the sealing of the handbrake cableBrakes · free repair (recall)
- 4High severity: Turbo wear and oil consumption1.8 T 20v engine
- 5High severity: Breakage of the aluminium front suspension armsSuspension
Documented engines, from highest to lowest risk
- Multitronic gearbox2000–2004 · multitronicMost serious fault:Critical severityVerdict:With caution
- 1.8 T 20v2000–2004 · 1.8TMost serious fault:High severityVerdict:With cautionSafest option
The first label is the most serious fault affecting that engine in this car; the second, our verdict for the versions it is fitted to. Each engine's risk index is calculated only from the faults that affect this car (how we calculate it). We only show engines we have documented with sources: if yours does not appear, we have not analysed it yet. View all engines
See what to check before buyingOutside the engine
2 recalls and campaigns documented, the latest: Summer 2003 recall for the rear brake hose. See the campaigns for the Audi A4 B6
Audi Multitronic (01J/0AW)
- In the A4 B6
- 2000–2004[5]
- Name
- multitronic
- Faults that affect it
- 3 · 2 of high or critical severity
Verdict for the version it uses
Multitronic 01J (1999-2007)1999–2007 · 01J
With cautionIt is the generation with the most documented control unit failures, jerking when pulling away and chain wear; it is only worth considering if the gearbox oil change history is verified, there are no stored fault codes and a cold road test shows no jerks or noises.[6][7]
Faults that affect the A4 B6
- Critical severityFrequency: CommonTransmissionWear of the variator chain and conesYes: the variator uses a chain of more than 1,000 links between two pairs of cones that wears with mileage, especially if the oil is not changed regularly. Gebrauchtwagenberater ties the gearbox's reputation to "numerous total failures"; Schaeffler/LuK sells a kit to repair the chain.
- High severityFrequency: CommonElectronicsControl unit (TCU) failure and limp modeYes: the multitronic control unit, especially in the 01J code (up to 2007), is one of its best-documented weak points. Overheating with oil seeping into the control unit causes fault warnings and limp mode and, if ignored, can end up damaging the gearbox itself.
- Medium severityFrequency: CommonClutchJerking and vibration when pulling away from cold (multi-plate clutch)Yes: with no torque converter, the multitronic pulls away using an electronic multi-plate clutch that can jerk or vibrate, especially when cold, if its plates are worn or the oil no longer has the right properties. It is one of the most cited fault symptoms of this gearbox.
A4 B6 Multitronic gearbox pageAll versions and faults of the Multitronic
1.8 T 20v
Safest optionVolkswagen/Audi 1.8 T 20v turbo (EA113) · Petrol
- Name
- 1.8T
- Faults that affect it
- 5 · 1 of high or critical severity
Verdict for the version it uses
1.8 T 20v 150 hp (AEB/AGU/ARZ/AUM, 1996-2005)1996–2005 · 150 hp · AEB, AGU, ARZ, AUM
With cautionA German used-car specialist notes that the ignition coils often give trouble on 2001 to 2003 units, and there is a documented case of an unreplaced timing chain tensioner on a 150 hp Passat with 184,000 km.[1][2]
Faults that affect the A4 B6
- High severityFrequency: OccasionalTurboTurbo wear and oil consumptionThe 1.8T turbo can fail over time -cases documented on an Audi TT at 60,000 and 155,000 km- and several sources link it to growing oil consumption in the engine itself. It is not the most cited fault, but it is one of the most expensive when it appears.
- Medium severityFrequency: OccasionalCoolingWater pump failureThe water pump is another documented weak point of the 1.8T: a 180 hp Audi TT had to have it replaced twice, at 110,000 and again at 130,000 km. Coolant leaks "in several places" are also described on a Passat with this engine.Appears at around 110,000 km
- Medium severityFrequency: OccasionalTimingTiming chain tensioner noise and wearAt least one owner documents the timing chain tensioner of this engine left unreplaced, with the resulting chain noise, on a Passat with 184,000 km; another report from a 180 hp Audi TT points to a timing problem at 90,000 km.
- Low severityFrequency: CommonIgnitionIgnition coil failureYes: the ignition coils (one per cylinder) are among the most cited faults of the 1.8T, especially on engines built between 2001 and 2003. They cause hesitation, a rough idle and the engine warning light coming on; usually it is enough to replace the coil of the affected cylinder.
- Low severityFrequency: CommonIntakeAir mass meter (MAF sensor) failureThe air mass meter (MAF sensor) fails fairly often on the 1.8T: on the 150 hp Audi A3 it appears in 3 of the 11 reports collected, and it is also documented on the 180 and 225 hp Audi TT. It causes hesitation and loss of power; it is fixed by replacing the sensor.
A4 B6 1.8 T 20v pageAll versions and faults of the 1.8 T 20v
Faults of the Audi A4 B6 outside the engine
Suspension, brakes, tyres, electronics and the rest of the car. They occur with any engine.
What the MOT inspection finds on the Audi A4 B6
Official Dutch MOT (APK) inspection data: 679 inspections of 300 cars registered between 2002 and 2003, compared with cars of the same age.
- Average
Suspension and axles· counts in the score
Defects in 8.8% of inspections; in cars of its age, 10.7%.
- Average
Brakes· counts in the score
Defects in 18.1% of inspections; in cars of its age, 14.2%.
- Fewer defects than average
Steering· counts in the score
Defects in 2.5% of inspections; in cars of its age, 4.9%.
- Average
Headlights and lights· counts in the score
Defects in 26.8% of inspections; in cars of its age, 29.2%.
- Fewer defects than average
Rust and bodywork· counts in the score
Defects in 1% of inspections; in cars of its age, 2.2%.
- Fewer defects than average
Exhaust and emissions
Defects in 3.8% of inspections; in cars of its age, 7%.
- Average
Fluid leaks
Defects in 18.4% of inspections; in cars of its age, 15.5%.
- Average
Glass, wipers and mirrors
Defects in 5.7% of inspections; in cars of its age, 6.6%.
- Average
Tyres and wheels· depends mostly on maintenance
Defects in 16.2% of inspections; in cars of its age, 17.2%.
The inspection measures wear and the defects visible at a periodic check, not engine or electronics failures. Source: RDW Open Data (public domain). How we calculate it · opendata.rdw.nl
Checklist for buying a used Audi A4 B6
Check the advert or the paperwork to see which engine the car has and go through its section. Each point comes from a documented fault; you can tick them off as you inspect.
If it has the Multitronic gearbox (2000–2004)
Wear of the variator chain and cones
Critical severityControl unit (TCU) failure and limp mode
High severityIf it has the 1.8 T 20v (2000–2004)
Turbo wear and oil consumption
High severityWater pump failure
Medium severityTiming chain tensioner noise and wear
Medium severityIgnition coil failure
Low severityAir mass meter (MAF sensor) failure
Low severityWear parts for the Audi A4 B6
Brakes, wiper blades, pollen filter and battery, searched for this model. The exact part number depends on the engine and year: confirm it with the registration plate or VIN.
Brake pads
Brake discs
Wiper blades
Pollen filter
Battery
Affiliate links: if you buy from these shops, MotorFiable may receive a commission at no cost to you. Check compatibility against the registration plate or VIN before ordering. Affiliate links
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Frequently asked questions
Is the Audi A4 B6 reliable?
All 1 engine and 1 gearbox of the Audi A4 B6 that we have documented have high or critical severity faults: the Multitronic gearbox and the 1.8 T 20v. None has a «Buy» verdict; the safest option is the 1.8 T 20v, with a «With caution» verdict. The Audi A4 B6 (Typ 8E), built between 2000 and 2004, shares almost all of its documented non-engine faults with the later B7: fiches-auto.fr describes breakages of the aluminium front suspension arms on 1.9 TDI versions, early clutch and dual-mass flywheel wear on diesels, and frequent failures of the electric window regulators, along with two recalls in 2002 and 2003 over the handbrake cable and the rear brake hose.
Which Audi A4 B6 engine is the most reliable?
Among the 1 engine and 1 gearbox we have documented, none has a «Buy» verdict; the safest option is the 1.8 T 20v, with a «With caution» verdict. A German used-car specialist notes that the ignition coils often give trouble on 2001 to 2003 units, and there is a documented case of an unreplaced timing chain tensioner on a 150 hp Passat with 184,000 km.[1][2]
What problems does the Audi A4 B6 have apart from the engine?
The Audi A4 B6 (Typ 8E), built between 2000 and 2004, shares almost all of its documented non-engine faults with the later B7: fiches-auto.fr describes breakages of the aluminium front suspension arms on 1.9 TDI versions, early clutch and dual-mass flywheel wear on diesels, and frequent failures of the electric window regulators, along with two recalls in 2002 and 2003 over the handbrake cable and the rear brake hose. The most important documented faults are: recalls for the rear brake hose and the sealing of the handbrake cable (brakes, critical severity), breakage of the aluminium front suspension arms (suspension, high severity), early wear of the clutch and dual-mass flywheel (diesel) (gearbox and clutch, medium severity) and breakage of the electric window regulator mechanisms (electrical system, low severity).[3][4]
What faults does the Audi A4 B6 have?
The most important by severity and frequency, on the engines we have documented, are: wear of the variator chain and cones (Multitronic, critical severity), control unit (TCU) failure and limp mode (Multitronic, high severity), turbo wear and oil consumption (1.8 T 20v, high severity), jerking and vibration when pulling away from cold (multi-plate clutch) (Multitronic, medium severity) and water pump failure (1.8 T 20v, medium severity).
Does the Audi A4 B6 have recalls?
Yes: we have documented 2 campaigns for the Audi A4 B6, such as summer 2003 recall for the rear brake hose (2003). Check with your VIN at the official service centre whether yours has been done.[3]
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Seat Leon Mk1: Probleme, Schwachstellen, ErfahrungenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
- Fiabilité et pannes Volkswagen PassatFiches-auto.fr · Other source · consulted 27 September 2026 · in French
- Fiabilité Audi A4 (2001-2007)fiches-auto.fr · Reliability study · consulted 27 September 2026 · in French
- Audi A4Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
- Audi A4Wikipedia · Other source · consulted 27 September 2026 · in Spanish
- MultitronicWikipedia · Other source · consulted 27 September 2026
- Typische Probleme & Haltbarkeit der MultitronicGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
- Fiabilité et pannes Audi TTFiches-auto.fr · Other source · consulted 27 September 2026 · in French