Audi A8 Quattro Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Audi A8 Quattro

No_car_image
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
Get a Repair Estimate For Your Audi A8 Quattro
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Repair Estimates

Never overpay. Check prices with our estimator

Audi A8 Quattro
$
576
to $
1,278
Audi A8 Quattro
$
291
to $
808
Audi A8 Quattro
$
2,002
to $
8,299
Audi A8 Quattro
$
582
to $
1,437
Audi A8 Quattro
$
513
to $
1,181

Audi A8 Quattro Problems

No Start after Refueling and Popping Noise from Trunk

Popping sounds from the rear of the vehicle may be heard moments after starting the engine, or when slowing to a stop. This noise is from the leak detection pump filling the fuel tank with air, and releasing to retest the system when it finds a fault. The sequence of faults identifying this issue are as follows:

  • Succession of loud pops from rear of vehicle
  • Pops go away, and fuel economy decreases 
  • Check engine light illuminates
  • OBD trouble code P2404 and/or P0441 is stored
  • Engine will not start after refueling (must crank for over 30 seconds)
  • Vibration when slowing to a stop

The cause is a valve which is mounted on the front of the intake manifold, commonly called the N80 valve, or EVAP system purge valve. The valve is designed to open under specific circumstances, but a worn valve will remain open at all times, preventing the pressurization of the fuel tank. 

Correction of the issue is to replace the N80 valve with the latest revision. 

Decreased Power and Fuel Economy from Carbon Buildup

The 2007-2017 Audi A8 with FSI/TFSI, including the W12 are direct injection engines. These engines are subject to carbon buildup in the intake system which can cause power loss, OBD codes and a check engine light, and a rough idle. In normal engines, the engine is cleaned by the gasoline flowing through the injectors and into the intake system, however, the A8 uses direct injection so gasoline does not flow through common carbon buildup areas. 

Possible trouble codes include: P0300P0301P0302P0303P0304, P0305, P0306, P0307, P0308, P0309, P0310, P0311, P0312.

The solution is to remove the intake manifold and professionally clean the intake manifold, intake ports on the cylinder head, and the intake valves. This may need to be done in as few as 20,000 miles. 

Various Probelms Caused by Clogged Plenum Tray Drain

Clogged drains can allow rainwater to accumulate in the plenum tray (at the base of the windshield). The water may leak into the vehicle's interior, brake booster, or electrical components, which can lead to major problems. Our technicians recommend keeping the tray clear of leaves, pine needles, and other debris.

See More Problems (10)

Audi A8 Quattro Questions

Parking Brake warning light. Pushrod: doyou think it is as simple as brake fluid (1 answer)

Just need brake fluid ? Really hope it's that simple.

How can parking brake warning light problem be checked out. Vehicle moves freely (1 answer)

Parking Brake Warning Light came on without warning. Stays lit even though parking brake motor appears to be engaging and disengaging brake when activated.

Not getting fuel (1 answer)

Car stalled and wasn't able to restart the car. Checked the fuse that wasn't it.

See More Questions (126)

Audi A8 Quattro Recalls

Coolant Leaks Into Engine Control Module Causing Stall Or Loss Of Power

A coolant valve may leak onto the engine control module and may cause the engine to stall or lose power. Dealers will replace the coolant valve and inspect for coolant that has leaked through the electrical connector of the engine control module free of charge to resolve the concern.

Sunroof Glass Is Not Secured To The Sunroof Frame

The sunroof glass may not be secured properly to the sunroof frame. Dealers will install additional adhesive between the sunroof glass and frame free of charge to resolve the concern.

The Sun Roof Glass Can Shatter

Vehicles equipped with a standard sunroof glass panel are being recalled because the glass can break without warning. Dealers will replace the sunroof glass on affected vehicles to correct this concern. 

See More Recalls (8)

Audi A8 Quattro Reviews

did you fix light. "on&off"
I HAVE A 2004 A8 IN MY DASH LIGHTS CUTS OF IN ON DO ANYBODY NO WHAT THAT COULD BE
The Audi company should improve the resistance on gear box. Because the most problem on this is gear. You can find Audi almost everywhere in the world but, there's no accessories, and good cars parked due to the same problem.

See More Reviews (10)