Audi S8
High-revving naturally aspirated engine with direct injection, 5.2-litre V10 with up to 419 kW. Intake valve carbon build-up from FSI typical; early examples known for piston rocking (fixed with facelift). Avoid Longlife intervals — fixed oil changes every 10,000 km recommended. Repairs almost always require engine removal.
V10 luxury barge — Lamborghini meets limousine
Same V10 as the S6 C6, but in the flagship sedan. Even more absurd, even heavier, even more expensive to maintain. Cold start sounds like a sports car, drives like a yacht with a rocket engine. Dirt cheap used — the running costs explain why.
Engine Weaknesses 11
The V10 5.2 FSI has four timing chains each with its own tensioner. Pressure loss in the 'Drive C' chain tensioner causes rattling on cold start. Longlife oil change intervals significantly accelerate chain wear.
Symptoms: Metallic rattling on cold start from the engine bay, disappears after 10–20 seconds; with neglect, permanent chain noise
The R-Tronic automated manual gearbox is considered the Achilles heel of the Gen1 R8. The bladder-type hydraulic accumulator loses its gas pre-charge; system pressure collapses. Typical: shift problems, crawl gears, warning lights. Clutch plate costs approx. 1,862 € gross; removal/installation 16–20 hours labour.
Symptoms: Jerky or refused gear changes, clutch slipping or not engaging cleanly, P0944 hydraulic pressure loss fault code, gearbox oil warning light
Thermal fatigue of the plastic weld seam causes cracking. Leaking coolant over the exhaust manifold can cause an engine bay fire. Recall affects all Gen1 R8 2007–2015. Original part number: 420-121-403.
Symptoms: Rear window mists up with coolant loss, coolant level drops without visible external leak; in the worst case smoke or fire in the engine bay
NHTSA recall affects all Gen1 R8 (2007–2015). Fix: retaining band (420-121-263) around the tank weld seam. Does not solve the underlying problem permanently — a bypass hose to reduce coolant temperature is recommended.
Symptoms: No driver-noticeable symptom until coolant loss; rear window mists up; fire risk in the engine bay on failure
Direct injection without port supply causes heavy coke deposits on the intake valves. Power loss of 30–60 hp documented (measurements rs-klinik.de: 390→444 hp after cleaning). Gen2 CSPB/CMSA has Dual Injection; the problem does not apply there.
Symptoms: Noticeable power reduction from around 50,000 km, rough idle, increased fuel consumption, difficult cold-start
Particularly the S6 C6 and S8 D3 show elevated oil consumption at higher mileage from worn valve stem seals. In the R8 with its dry sump system more critical to monitor; consumption over 300 ml/1,000 km is considered a defect.
Symptoms: Blue smoke on cold start, rising oil consumption above 0.5 L/1,000 km, oil smell after switch-off; warning light illuminates if neglected
FSI high-pressure pumps can develop leaks; fuel vapour enters the engine bay. Injectors (OEM no. 07L906036G / 07L906036K) can become leaky at high mileage and contaminate the engine oil. 10 injectors total, 200–300 € each.
Symptoms: Fuel smell in the engine bay, rough idle, increased consumption, rough running especially on cold start, engine warning light P0300 misfire
The R8-specific dry sump system with a separate oil tank combines the coolant pump and a multi-stage oil pump in one module. Seals and O-rings of this assembly can develop leaks. Access almost always requires engine removal — extremely high labour share.
Symptoms: Oil spots under the vehicle rear-centre, falling oil level without a visible external leak, oil smell after driving
10 ignition coils (OEM: ELDOR) and 10 spark plugs (NGK PFR7S8EG / 06H905601A) represent considerable maintenance effort. Recommended every 30,000 km. V10 Spyder particularly difficult to access. Parts + labour cost: 500–900 €.
Symptoms: Misfires (P030x fault codes), rough idle, engine vibrations, increased consumption; a single failed coil causes noticeable power loss with 10 cylinders
The V10 has up to 6 lambda sensors depending on configuration (pre- and post-cat, both banks). Failures are more frequent than on smaller engines as exhaust temperatures and sensor count are higher. Single sensor 80–250 €; installation on the V10 more expensive due to tight access.
Symptoms: MIL light (engine warning light), increased fuel consumption, P0130/P0136/P0150/P0156 fault codes, slight power reduction; extended failure can cause catalytic converter damage
Recall for Gen1 R8 affects engine management software. Vehicles may not meet all emissions requirements. Emissions test-relevant inspection software changed — vehicles without the update may fail the emissions test.
Symptoms: No driver-noticeable symptom; ECU shows outdated software version; vehicle may fail emissions test
Vehicle Weaknesses 7
The Adaptive Air Suspension (AAS) on the S8 D3 suffers from cracked air bellows and weakening compressors. Vehicle sags after standing. A single air spring costs €350–1,000; the compressor €300–900.
The S8 D3's 6-speed Tiptronic suffers torque converter wear and rough shifting when the oil is neglected.
The MMI 2G infotainment system frequently fails on older D3 cars — caused by moisture or overvoltage damage. Audi charges €4,500; repair services cost around €300–400.
Brake pads and discs on the S8 D3 wear relatively quickly given the car's high weight (~1,900 kg) and engine output.
After a battery replacement, numerous control units can throw faults and deactivate functions. The complex vehicle requires coding with VCDS.
Suspension bolts and axle bearing components rust on non-galvanised parts over the years. Underbody protection treatment is recommended as a preventive measure.
On D3 cars over 15 years old, leather trim, wood decor and Alcantara surfaces show clear signs of ageing. Refurbishment is expensive.
Reports & Tests
10 owner complaints filed with NHTSA (2006–2011). Most reported: Visibility (5), Wipers & Visibility (2), Cruise Control (2).