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2005 Audi A8 / S8 repairs by problem area

Engine (32%)

Transmission and Drivetrain (3%)

Brakes and Traction Control (3%)

Suspension and Steering (19%)

Electrical and Air Conditioning (32%)

Paint, Rust, Leaks, Rattles, and Trim (1%)

Other (10%)

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Chart based on 145 repairs.

See TSBs and recalls for the 2005 Audi A8 / S8.

2005 Audi A8 / S8 electrical repair cost distribution

$2500+ (5%)

$1000 - $2499 (18%)

$500 - $999 (18%)

$100 - $499 (40%)

< $100 (20%)

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Chart based on 40 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

89000 mi

US $2500

My MMI went out. Had to install new MMI brain.

99820 mi

C $1500

J518 acc/start auth module defective. (integrates the immobilizer system function and steering wheel lock mechanism). I was lucky it started, I was about to tow it. Problem was caused by a drain clog in the firewall. Water accumulated under the carpet and entered the access start module, creating corrosion. Module had to be replaced.

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153000 mi US $362	Driver headlight went out. Replaced element, still out. Replaced module, still out. Replaced ballast (exciter), worked.
158000 mi US $700	Also $200 to replace evaporator drain tubes, which had clogged.
163000 mi US $1000	Alternator went out. Water cooled alternator purchased from Audi dealer($605) 3 hours labor. Also had oil change at same time.

95300 mi US $310	right front xenon headlamp replaced.
99000 mi US $300	left front xenon low beam bulb
112000 mi US $800	started motor solenoid - once engine was warm it would not start - ended up replacing motor - which is complex since access meant engine support submember needed removal

96100 mi

US $6000

Soft close door modules failed in the back, on both sides.

66824 mi

US $745

Driver window does not go full-down automatically when switch is pushed to 2nd click. Replaced master window switch assembly. Steering wheel MMI controls not working. Replaced shorted steering wheel MMI control switch

110000 mi US $400	Passenger side back-up light Bulb alone $40+
135000 mi US $500	Headlights work intermittent. Dealership can not find a problem. Headlamps turn off while driving will not come back on. Wires connecting rear air big sensor failed
127700 mi US $1100	Headlights become too dim at night to be able to drive after dark. Dealer quoted $4,000 to fix! Found replacement Hella units for $900 at carid.com, labor to install at Body Ship $200.

59693 mi US $84	REPLACE INSTRUMENT CLUSTER (84) (Burned out dash lights across middle of dash) WARRANTY DID NOT COVER
75000 mi US $100	TRUNK MOTOR FOR "PULL & SEAL", $100 INSURANCE DEDUCTABLE
87000 mi US $100	BLOWER MOTOR REPLACED FOR A/C $641 (PARTS 299 LABOR 342) ONE WINDOW REGULATOR ASSEMBLY REPLACED $437 (PARTS 272 LABOR 165)
87800 mi US $479	HEADLIGHT SWITCH REPLACED PARTS 250 LABOR 82 INSURANCE DEDUCTABLE 100 INSURANCE PAID 232
92300 mi US $1182	REPLACED HEADLAMP

105700 mi US $400	105,000 Service-Audio and MMI are not working properly. Dealer has not been able to diagnose or find problem.
109000 mi	Two year old battery was replaced; battery control module was updated along with an MMI Zug update. Some MMI problems were solved but other problems in multifunction steering wheel cropped up. None of the controls on the multifunction work. I am waiting for steering wheel parts to come in.

69000 mi

US $600

Both MMI and GPS units replaced.

47000 mi US $108	Tire pressure monitor failed. Sensor replaced. The entire unit must be replaced (about $200 each) after ~5 years. Stupid!! The lithium battery is identical to the cheap units in my watch.
61200 mi US $40	Brake light switch faulty, replaced.

104000 mi US $800	stuck heater control valve
134000 mi US $250	heater fan sporadically failed. regulator replaced.
141000 mi US $175	mmi screen hung up
147000 mi US $450	heater fan malfunction

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81500 mi	Warning light for seat belt. Left rear seat belt tensioner igniter fault. Replaced left rear seat belt assembly.
111000 mi US $2395	MMI display gear stripped. Qouted $960 to fix. I declined. Found replacement gear on internet, will do myself. TPMS system malfunction. TPMS sensors in wheels need to be replaced. Estimated cost $850. Found TPMS units on web for $46 each. Will have tire store replace.
111300 mi US $200	TPMS sensors replaced.
119000 mi US $1386	Check eng. light on. Was alternator problem. Need new WATER COOLED alternator Nav display making clunking noise on way up and way down. I bought a new gear on the internet for about $15. Repair took about 3 hours. Followed directions from the internet. Everything works great now.

67000 mi

US $675

Fully replace MMI screen mount due to failure to open and close correctly. Gears broken and switch that controls the start and stop of MMI motor faulty. Total cost including labor.

110000 mi

US $250

Battery was weak.

91000 mi	TPMS sensors failed twice. Currently functioning. Dealer said TPMS batteries failed. Will replace for $50 under CPO warranty.
96700 mi US $50	Replaced all five sensors.

89000 mi

US $50

Dealer Left Clean Air Sensor detached

88000 mi US $340	Tire Pressure monitor fault. System antenna replaced; however problem still exists
93000 mi US $300	Outer driver door handle replaced -lock button failed and could not lock the car using the keyless system Had tire pressure monitoring system disabled. Complete repair would cost up to $1,500 so had mechanic disable the system
96000 mi US $40	MMI system would not work and system could not be re-booted. Technician found a stuck button on the MMI controller