Year Range Hub

2019–2021 Audi Q8 (4M8)

Browse our directory of 2019–2021 Audi Q8 (4M8) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.

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Showing 40 registrations for the 2019–2021 Audi Q8 (4M8). Select any plate for an instant vehicle history check.

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Common Problems & Reliability

3
Serious
1
Moderate
0
Minor

The 2019–2021 Audi Q8 (4M8) has 4 known issues. 3 of these are classified as serious faults that could be expensive to repair. 1 are moderate concerns worth inspecting before purchase.

48V Alternator / Generator Failure

Serious

The 48V mild-hybrid system can fail due to a faulty belt alternator starter, leaving the car stranded when the 12V system drains.

Symptoms: "Electrical System: Fault!" message in red, Start-stop inactive...

Est. repair cost: £1,000–£2,500

Adaptive Air Suspension Leaks

Serious

The air springs can develop leaks causing uneven ride height, and the compressor burns out trying to compensate.

Symptoms: One corner sitting low after parking, Compressor running constantly...

Est. repair cost: £800–£2,500

48V Mild Hybrid System Faults

Serious

The belt-starter-generator can fail, disabling start-stop and energy recuperation, and potentially stranding the car when both batteries drain.

Symptoms: Electrical system malfunction warning, Start-stop inactive...

Est. repair cost: £0 (recall) – £1,500

Infotainment and MMI Freezing

Moderate

The dual-touchscreen MMI system can freeze, go black, or reboot spontaneously, affecting climate and vehicle controls.

Symptoms: Frozen or black screens, Climate controls unresponsive...

Est. repair cost: £0–£900

View detailed Audi Q8 (4M8) fault guide

Buying Tips for the 2019–2021 Audi Q8 (4M8)

  • Look out for 48V electrical system faults, specifically the Belt Starter Generator (BSG) failure, which will drain the battery and leave the car stranded; verify if it has been replaced under warranty.
  • Test the dual-touchscreen MMI system thoroughly for responsiveness and ensure the haptic feedback works evenly across both screens.
  • Check the frameless doors for excessive wind noise at motorway speeds, which may indicate worn weather seals or poorly aligned window regulators.
  • Inspect the enormous alloy wheels (up to 23 inches) for kerbing and check tyre tread depth; replacing a set of premium tyres is exceptionally expensive.
  • Ensure the adaptive air suspension adjusts smoothly between modes without sagging or throwing dash warnings, as replacing the complex struts is a huge expense.

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