IsItAGoodCar
Reliability Guide

Common Problems with the
2016 Audi A8 Mk3 (D4)

We've identified 4 known issues that can affect the 2016 Audi A8 Mk3 (D4). 2 of these are serious faults that could be expensive to repair.

4
Known Issues
2
Serious
2
Moderate
0
Minor

All Known Issues

Air Suspension Failure

SeriousSuspension & Chassis

Air struts leak and the compressor burns out trying to compensate. This is a common and expensive reality of aging luxury cars.

Est. Repair Cost: £1,000–£3,000
Warning Signs:

Car sits low on one corner overnight, Air suspension fault warning, Loud compressor noise from the front bumper area

What to Inspect:
  • Check the car sits level before the engine is started
  • Cycle the ride height through its settings
Verified by IsItAGoodCar Research TeamUpdated

4.0 TFSI Turbo Strainer Blockage

SeriousEngine

A tiny oil strainer screen feeding the twin turbos can block with carbon, starving the turbos of oil and causing rapid, catastrophic failure.

Est. Repair Cost: £3,000–£5,000
Warning Signs:

Siren noise from turbos, Loss of power, EPC light on

What to Inspect:
  • Ask if the oil strainer has been replaced or removed (a common preventative fix)
  • Check for extremely regular high-quality oil changes
Verified by IsItAGoodCar Research TeamUpdated
Official Recalls & Reference Documents:

Electrical Module and Sensor Failures

ModerateElectrics & Electronics

The complex electronics produce various module failures including air suspension control units, comfort modules, and sensor faults as the car ages.

Est. Repair Cost: £200–£1,500
Warning Signs:

Multiple dashboard warnings, Central locking faults, Infotainment glitches, Battery drain

What to Inspect:
  • Run full diagnostic scan with VCDS
  • Test all comfort and convenience functions
  • Check for parasitic battery drain
Verified by IsItAGoodCar Research Team

Cooling System Leaks

ModerateCooling System

The coolant regulating valve, water pump, and various plastic hoses can leak, causing gradual coolant loss and potential overheating.

Est. Repair Cost: £350–£1,000
Warning Signs:

Low coolant warning, Pink residue around engine, Sweet smell after shutdown

What to Inspect:
  • Check coolant level from cold
  • Inspect for staining around the water pump and valley area
  • Look for coolant residue on the belly tray
Verified by IsItAGoodCar Research Team

Buying Tips for 2016 Audi A8 Mk3 (D4)

  • Test the adaptive air suspension in all modes (Comfort, Dynamic, Lift); the car should not sag, and the compressor shouldn't sound excessively loud or run constantly.
  • Check the complicated MMI infotainment system and the motorized pop-up screen for smooth operation, as the retraction mechanism gears frequently fail.
  • Inspect the V8 4.2 TDI and TFSI engines for oil leaks, particularly around the oil cooler in the V-valley, which is a labor-intensive and expensive job to fix.
  • Ensure all soft-close doors, massaging seats, and electrically adjustable rear seats function flawlessly, as diagnosing faults in the vast electrical network is very costly.
  • Listen for timing chain rattle on cold startup; like the A7, replacing the chains on these engines requires full engine removal.
  • Verify that the ZF 8-speed automatic gearbox shifts smoothly; while reliable, it benefits greatly from a fluid and filter change around 60,000 miles.
Check a 2016 Audi A8 Mk3 (D4) by Registration