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Audi A4 B5 common faults.

1994–2001. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Audi A4 B5

Vauxford / CC BY-SA 4.0

What to watch for

What can go wrong on this car?

The list covers the generation, the engines and the transmissions. Once you pick the version, only the faults that apply to it stay.

critical2

expensive3

Dual mass flywheel: diesel

expensive

The internal springs of the flywheel tire, and the two discs knock against each other.

Applies to the engine AJM, AFB, AFN and 6 more.

PD TDI: camshaft and rocker wear

expensive

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, ATJ.

comfort2

Secondary air system: pump and combination valve (P0411)

comfort

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 ACK, ADP, ADR and 28 more.

cheap repair1

Official recall2 recallsShow

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 Gate

The 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

The authority's notice

A12/00849/20Safety recallInjuriesno date · EU Safety Gate

Audi 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

The authority's notice

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.

B5 · 1994–2001

Pick the version.

The fault list opens on the version page.

85 versions

Showing 60 of 85 versions.

Neighbouring generations

B5 · 1994–2001

B5 (1994-2001). If the listing is from the changeover year, look at the neighbour too.

Previous generation

This is the earliest.

This generation

B5 · 1994–2001

Next generation

B6 · 2001–2004

Common questions

About this generation

Which years does this page cover?

1994–2001. The changeover year can fall in two generations. If the listing is from that year, look at the neighbour too.

Does the fault apply to every car like this?

No. It depends on the engine and the transmission too.

Is it free?

The fault list is.

Information, not an expert opinion

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.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms