IsItAGoodCar
Reliability Guide

Common Problems with the
2022 Audi A6 Mk5 (C8)

By 2022 the C8 had matured with improved software and the BSG issues were largely resolved through recalls. This is generally the safest used C8 buy, though the complex electronics still demand thorough testing.

What changed for 2022

  • •Updated engine range with improved efficiency
  • •Revised MMI software with improved stability
  • •Enhanced driver-assistance features
  • •Updated interior trim options

Common MOT watch-outs

  • !Water pump and thermostat housing leaks
  • !Electrical module faults on higher-mileage cars
  • !DPF issues on town-driven diesels
5
Known Issues
3
Serious
2
Moderate
0
Minor

All Known Issues

Belt Starter Generator (BSG) Failure

SeriousElectrics & Electronics

The 48V mild-hybrid system can fail, leading to an "Electrical system: fault" message.

Est. Repair Cost: £0–£1,500
Warning Signs:

Warning messages, Total electrical failure while driving

What to Inspect:
  • Check Audi recall database for "48V BSG" campaign
  • Ask for evidence the starter-alternator recall (R/2020/138 / R/2020/265) has been completed
Verified by IsItAGoodCar Research TeamUpdated
Official Recalls & Reference Documents:

DL382 S tronic Gear Selection / Mechatronic Faults

SeriousGearbox & Transmission

Control or clutch faults can interrupt gear selection. Identify the gearbox code first: this entry applies to the longitudinal DL382 family, not every automatic sold under the same model name.

Warning Signs:

Gearbox warning, Delayed engagement or missing gears

What to Inspect:
  • Test drive from cold and again when warm
  • Check gearbox-specific service invoices and obtain a diagnostic report
Verified by IsItAGoodCar Research TeamUpdated

TDI AdBlue / NOx Sensor Faults

SeriousExhaust & Emissions

SCR dosing or NOx sensor faults can trigger an emissions warning and a no-restart countdown. Adding fluid alone does not resolve every system fault.

Warning Signs:

AdBlue system fault, No-restart countdown

What to Inspect:
  • Check stored faults and repair invoices
  • Have dosing pressure and NOx readings checked before replacing parts
Verified by IsItAGoodCar Research TeamUpdated

Dual MMI Touch Response Screen Freezing & Blackouts

ModerateElectrics & Electronics

The dual upper (navigation/media) and lower (climate/haptics) touchscreen displays can fail to initialize, suffer touch input lag, or reboot randomly while driving.

Est. Repair Cost: £0–£650
Warning Signs:

Lower climate screen unresponsive to haptic touch, Upper display freezes on Audi logo, Reversing camera image flickers

What to Inspect:
  • Test both touchscreens through multiple submenus
  • Verify MIB3 software version is above 3241
Verified by IsItAGoodCar Research TeamUpdated

2.0 TDI / 3.0 TDI Coolant Regulation Valve & Water Pump Weepage

ModerateCooling System

Electrically controlled coolant regulator shut-off valves and vacuum-actuated water pump plastic housings develop weeping leaks, coating the front of the block in crusty pink residue.

Est. Repair Cost: £380–£850
Warning Signs:

Low coolant warning chime, Coolant level steadily drops over 1,000 miles, Faint sweet smell from engine bay

What to Inspect:
  • Inspect lower undertray and engine front for pink coolant crust
  • Verify expansion tank pressure seal
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 2022 Audi A6 Mk5 (C8)

  • Ensure all BSG recall work has been completed
  • Check both touchscreens for lag and dead spots
  • Prefer cars with documented main dealer or specialist service history
2020–20212023
Check a 2022 Audi A6 Mk5 (C8) by Registration