Audi A4 B5 (1994-2001): known problems and buying guide

Buy with timing belt records, and a camshaft check on any 2.5 TDI. Check the door bottoms and front joints too.

Updated 26 October 2026

All versions

Variant	Running cost per month	Median price	Listings	Fuel	Engine codes	Gearbox	Production years
1.6, 101 PS, 5-speed manual	€437	€1,700	62	Petrol		Manual (5)	1999–2000
1.6, 102 PS, 5-speed manual	€442	€1,700	62	Petrol		Manual (5)	2000–2001

Years: built 1994 to 2001 as saloon and Avant, including S4 and RS4. The facelift came in 1999.
Reliability: 3/5. ADAC rates the 1.9 TDI as a long-runner, but the 2.5 TDI camshafts, the timing belt and door rust need checks.
DIY: 3/5. Oil, filters and brakes are home work. Camshafts, the injection pump and the timing belt need a workshop.
Prefer: a 1.9 TDI or a 1.8T. ADAC recommends the 1.8T as especially durable.
Avoid: a 2.5 TDI V6 without proof that the camshafts and injection pump are sound.

1.6 (ADP, AHL, ANA, ARM, ALZ; 101-102 PS): no fault confirmed in the sources read.
1.8 20V (ADR, APT, ARG, AJP; 125 PS): no fault confirmed in the sources read.
1.8T (AEB, APU, ANB, AWT, AJL): ADAC recommends it as especially durable. No fault confirmed in the sources read.
V6 petrol (2.6, 2.8, 2.4, 2.8 30V): ADAC finds them smooth but weak when pulling away and thirsty at the pump. No fault confirmed.
S4 (AGB, AZB): ADAC says they are rarely found in original condition. No fault confirmed.
RS4 (ASJ, AZR): the same ADAC remark applies. No fault confirmed.
1.9 TDI (1Z, AHU, AHH, AFN, AVG, AJM, ATJ): ADAC calls them long-runners, often past 300,000 km. The timing belt is the main risk.
2.5 TDI V6 (AFB, AKN): the camshafts, rocker arms and injection pump fail. ADAC says it is not as tough as the 1.9 TDI.
5-speed manual: no fault confirmed in the sources read.
6-speed manual: no fault confirmed in the sources read.
4-speed automatic (01N): no fault confirmed in the sources read.
5-speed ZF automatic (5HP19, quattro): no fault confirmed in the sources read.

Issue	Affects	Typical km	Repair cost
2.5 TDI camshafts and rocker arms	2.5 TDI (AFB, AKN), 1997-2001	Not stated	No confirmed price
2.5 TDI injection pump	2.5 TDI (AFB, AKN)	Not stated	No confirmed price
Timing belt on TDI engines	1.9 TDI and 2.5 TDI	Due at 90,000-120,000 km	No confirmed price
Front suspension arms and joints	All cars	Not stated	No confirmed price
Door rust at lower edges and behind trim strips	All cars	Not stated	No confirmed price

2.5 TDI camshafts: ask a specialist to check the camshafts and rocker arms. The rocker cover has to come off. A loud tapping from the top of the engine, or lost power, is a bad sign. Ask whether revised camshafts are fitted.
2.5 TDI injection pump: ask for proof of pump work. The Bosch VP44 pump is one of the most common failures. The sources name no home check for it, so a specialist must test it.
Timing belt on a TDI: ask for proof of the last belt change, every 90,000-120,000 km. A TDI needs the whole front end off for this job, so no proof is a bad sign.
Front suspension: lift the car and check the front arms and ball joints for play. A knock over bumps or a clatter from the front axle is a bad sign. No scanner needed.
Door bottoms: check the lower edges of the doors and the area behind the trim strips for bubbling paint or rust. No tools needed.
Open recalls: ask a dealer to check open campaigns by VIN.

Operational	€258
Workshop	€116
Fixed costs (tax, insurance)	€112
Total per month	€486
New-car depreciation (not included)	€37

ADAC figures for 15,000 km a year over 60 months

Listings on mobile.de priced up to 50,000 EUR, 29 October 2026.

To check a listing's price, open its variant in the table above. Each variant page has a price check.