Audi A4 B6

Body Variants

The Audi A4 B6 is available as Limousine and Avant — choose your body type for specific insurance data:

Generations

Engine Overview

The Audi A4 B6 is available with 9 engine variants — from 90 to 344 hp. 3 variants had engine changes — the model year is crucial.

Vehicle Weaknesses

Alternatives

Known Problems and Issues

A total of 150 weaknesses have been documented for the Audi A4 B6 (2000–2004) — 139 engine-related and 11 vehicle-related. 5 problem engines: AEB (1.8L Turbo), AKN (2.5L TDI V6), BEX (1.8L Turbo), BFC (2.5L TDI V6), BBK (4.2L V8 FSI). Typical issues affect Suspension, Interior, Electronics, Cooling. Considered reliable: AGN (1.8L 20V), BAU (1.6L MPI), BBJ-V6 (3.0L V6).

A4 (AFN, 1994–2001) — Be Careful: Timing belt idler pulley seizing — risk of breakage, Injection pump leaking — distributor pump seal defective, Injectors worn — starting difficulties. Power: 110–116 PS.

A4 (AGR, 1995–2001) — Be Careful: VP44 distributor injection pump fails, Camshaft worn, Turbocharger power loss. Power: 90 PS.

A4 (AKN, 1997–2001) — Stay Away!: Camshaft wear, VP44 distributor injection pump failed, Turbocharger wear. Power: 150–155 PS.

A4 (AWX, 2000–2004) — Be Careful: Camshaft and Hydraulic Tappet Wear, VGT Turbocharger Vanes Blocked, Unit Injectors Worn. Power: 131 PS.

A4 (BFC, 2000–2004) — Stay Away!: Camshaft and valvetrain wear, Timing belt failure with engine damage, VP44 injection pump failure. Power: 163–165 PS.

A4 (BFC-121, 2002–2006) — Be Careful: Camshaft wear from sliding rocker arms, VP44 injection pump ECU defective, Dual-mass flywheel wear. Power: 163–165 PS.

A4 (ADP, 1994–2001) — Be Careful: Ignition Distributor and Hall Sensor Failure, 4-Speed Automatic Revs Without Power Transfer, Lambda Sensor Fails Early. Power: 101–102 PS.

A4 (AEB, 1994–2001) — Stay Away!: Timing belt and water pump, Oil sludge from Longlife service intervals, Crankshaft rod bearings worn. Power: 150 PS.

A4 (APR, 1996–2001) — Be Careful: Multitronic CVT gearbox prone to wear, Timing belt and tensioner — service often missed, Head gasket leaking (V-bank oil loss). Power: 193 PS.

A4 (AGA, 1997–2001) — Be Careful: Chain elongation — internal camshaft chains, Idler and tensioner pulley — timing belt drive, High oil consumption. Power: 163–170 PS.

A4 (ALT, 2000–2004) — Be Careful: Excessive piston ring groove play — oil consumption, Cam phaser failed or leaking, Thermostat sticking — overheating risk. Power: 131 PS.

A4 (AVJ, 2000–2004) — Be Careful: Timing Belt: Early Replacement Required, Water Pump with Plastic Impeller, Cracks in Plastic Coolant Flange. Power: 150 PS.

A4 (APS, 2000–2004) — Be Careful: Timing chain tensioner and chain elongation, Timing belt drive — pulley wear before interval, Internal oil consumption. Power: 163–170 PS.

A4 (BDV, 2001–2004) — Be Careful: Chain Stretch and Faulty Chain Tensioners, Elevated Oil Consumption, Valve Cover Gasket Leaks. Power: 163–170 PS.

A4 (BFB, 2002–2004) — Be Careful: Turbocharger Damage from Oil Coking, Turbocharger K03 Shaft Play / Bearing Damage, Crankcase Breather (CCV) Failure. Power: 163 PS.

A4 (AWA, 2002–2004) — Be Careful: Oil Sludge from Inadequate Oil Supply, Timing Belt and Plastic Water Pump, Oil Sludge Formation with Longlife Service. Power: 190 PS.

A4 (AGA, 2002–2006) — Be Careful: Chain elongation — internal camshaft chains, Idler and tensioner pulley — timing belt drive, High oil consumption. Power: 163–170 PS.

A4 (BEX, 2002–2004) — Stay Away!: Oil Sludge from Longlife Service, Timing Belt and Water Pump, Timing Chain Tensioner Failure 4.2 V8. Power: 163 PS.

A4 (BBJ, 2002–2004) — Be Careful: Intake valve carbon buildup, Elevated oil consumption, Injectors worn / coked. Power: 150 PS.

A4 (AGA-120, 2002–2006) — Be Careful: Oil consumption from valve stem seals, Camshaft adjuster leaking (oil loss), Timing chain tensioner weakening. Power: 163–170 PS.

A4 (BBK, 2003–2005) — Stay Away!: Timing chain: tensioners and guide rails — THE main problem, Alusil cylinder bore wears — elevated oil consumption to engine failure, Camshaft adjusters generate fault codes — limp home. Power: 344 PS.

What to watch out for with the Audi A4? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions