Audi A4 Allroad common problems and MOT failures
What goes wrong on a used Audi A4 Allroad, year by year: known faults from UK buying guides, the parts flagged at MOT more than on other cars (from 421 MOTs done during 2023–2025), and what to check before you buy one.
Pick the year
Most years have their own guide. The year is when the car was first registered (it’s on the logbook, or check the reg below).
What usually goes wrong with an Audi A4 Allroad?
Known faults reported by owners, mechanics and UK buying guides, in our own words. Most apply to certain years or engines only, so check which the car has.
- Cars registered in 2020 · Mild-hybrid models
Starter-alternator recall (mild hybrids)
Moisture could get into the starter-alternator on mild-hybrid cars, which led to two recalls in 2020.
At the viewing: Ask an Audi dealer or the seller to confirm the recall work was done.
- Cars registered in 2020 · All engines
Seat and airbag recalls
There were recalls for front seats and seat frames, and for airbags and seatbelt pre-tensioners that might not work.
At the viewing: Make sure the airbag light goes out, and ask for proof of recall work.
- Cars registered in 2020 · All engines
Stop-start problems
Some owners report problems with the stop-start system.
At the viewing: Watch the engine stop and restart smoothly at junctions, with no warning lights.
- Cars registered in 2020 · All engines
Trim rattles
Rattles from the cabin trim are a common complaint.
At the viewing: Drive on a rough road and listen around the dashboard and doors.
- Cars registered in 2020 · Avant estate
Powered tailgate faults (Avant)
The powered tailgate on Avant estates can play up.
At the viewing: Open and close it several times with the button and the key.
Audi A4 Allroad MOT pass rate by year
Older cars fail more, so compare each year with all cars registered the same year.
| Year | Pass first time | All cars that year | MOT tests |
|---|---|---|---|
| 2020 | 92% | 87% +5 | 421 (small sample) |
Looking at an Audi A4 Allroad?
Check the actual car: its own MOT history and what to ask the seller. Free, no sign-up.
Where this comes from: MOT figures are the DVSA’s anonymised results for every MOT test done in Great Britain during 2023–2025, grouped by the year each car was first registered. How many are on the road is from the Department for Transport’s vehicle licensing statistics. Known faults are from UK buying guides, in our own words, with links. How we score