2023 Audi A6 diesel: common problems and MOT failures

Common 2023 Audi A6 diesel MOT failures and advisories

The share of 2023 Audi A6 diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

• Tyres
  12% of testsRough price £70–£150

  At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

• Brakes
  2% of testsRough price £150–£350

  At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

• Seats and seatbelts
  1% of testsRough price £80–£250

  At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.

• Wipers, windscreen and mirrors
  1% of testsRough price £15–£250

  At the viewing: Check for chips in the driver's view, and test the wipers and washers.

Known faults on the 2023 Audi A6 diesel

Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.

• Electrical and infotainment faults

  All engines

  It came last of 24 executive cars in What Car?'s survey: 44% had a fault, about two-thirds electrical or infotainment (phones not connecting, flickering screens), and nearly half took over a week to fix.

  At the viewing: Connect your phone, use the screens, and check every electrical item.

  Source: What Car?: used Audi A6 (2018 on) reliability

• Rattles and trim buzzes

  All engines

  Rattling parcel shelves and buzzing trim are reported.

  At the viewing: Drive on a rough road and listen.

  Source: What Car?: used Audi A6 (2018 on) reliability

Questions to ask the seller before buying a 2023 Audi A6 diesel

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

1. What has been fixed under warranty, and has the software been updated?
2. Can I see the service history and receipts for any big jobs?