The 2016 Audi S8 with its 4.0L twin-turbo V8 is a spectacular performer when healthy, but notorious for catastrophic engine failure due to turbo oil feed issues and cylinder deactivation system weaknesses that starve cylinders of oil, leading to scored bores and spun bearings—often requiring complete engine replacement.
Catastrophic Engine Failure - Cylinder Scoring and Bearing Failure
Common · high severity
Typical onset: 60,000-90,000 mi
Symptoms: Metal shavings in oil during changes, Ticking or knocking from engine bay especially on cold start, Excessive oil consumption (1 qt per 1,000 mi or worse), Check engine light with misfire codes, Sudden loss of power or complete engine seizure
Fix: The COD (Cylinder on Demand) system and turbo oil supply design cause oil starvation to cylinders 2, 3, 5, and 8. Cylinders score, pistons seize, bearings spin. Most require complete engine replacement or full rebuild with updated pistons, bore honing, and crank work. 40-60 hours labor for engine R&R plus machine work.
Estimated cost: $18,000-35,000
Turbocharger Oil Feed Line Failure
Occasional · high severity
Typical onset: 70,000-110,000 mi
Symptoms: Blue smoke from exhaust on acceleration, Oil leaking onto exhaust manifolds creating burning smell, Turbo whistle or whine changes pitch, Loss of boost pressure, Low oil pressure warning
Fix: Oil feed lines to turbos crack or seep at crimped fittings, starving turbo bearings and contaminating intake system. Both turbos typically need replacement along with feed lines. Engine-out service recommended. 25-35 hours labor.
Estimated cost: $8,000-14,000
Transmission Oil Cooler Failure
Common · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Transmission fluid leaking from front of vehicle, Harsh or delayed shifts when cold, Limp mode activation, Coolant mixing with trans fluid (milky appearance on dipstick), Overheating transmission warning
Fix: The ZF 8-speed's integrated oil cooler develops internal cracks or external seepage. Requires cooler replacement, full fluid flush, and often filter/pan service. Front bumper and undertray removal needed. 6-9 hours labor.
Estimated cost: $1,800-3,200
Transmission Mount Collapse
Occasional · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunk when shifting from Park to Drive or Reverse, Vibration through chassis at idle in gear, Harsh engagement on acceleration, Visible sag of transmission tailshaft when inspected on lift
Fix: Hydraulic transmission mount separates internally from heat cycling and drivetrain torque. Requires transmission support, mount replacement, and alignment verification. 3-5 hours labor.
Estimated cost: $800-1,400
Carbon Buildup on Intake Valves
Common · medium severity
Typical onset: 40,000-70,000 mi
Symptoms: Rough idle especially when warm, Hesitation or stumble during light acceleration, Misfires under load, Reduced fuel economy, Long crank times on cold starts
Fix: Direct injection means no fuel washing over valves. Carbon accumulates heavily. Requires intake manifold removal and walnut blasting all 8 cylinders. Should be done every 40k-50k mi as preventive maintenance. 8-12 hours labor.
Estimated cost: $1,200-2,000
Fuel Filter Clogging and High-Pressure Pump Wear
Occasional · medium severity
Typical onset: 50,000-80,000 mi
Symptoms: Hard starting or extended cranking, Stumble or cut-out under wide-open throttle, Limp mode with fuel pressure codes, Rough running at highway speeds
Fix: In-tank fuel filter rarely gets changed per Audi's 'lifetime' claim, causing pump strain. High-pressure pump on engine also wears from contamination. Require tank drop for filter, pump access. HP pump needs intake manifold and fuel rail removal. 10-14 hours combined.
Estimated cost: $2,500-4,000
Owner tips
Change engine oil every 5,000 mi with quality 5W-40 synthetic regardless of oil life monitor—oil starvation is the killer on this engine
Have oil analysis done every other change to catch bearing material early before catastrophic failure
Budget $2,000/year minimum for carbon cleaning, transmission services, and preventive cooling system work
Walnut blast intake valves every 40,000 mi without exception
Inspect turbo oil feed lines annually after 60k mi—catching seepage early saves turbos
Avoid extended idle periods and short trips—this engine needs heat cycles to function properly
Only buy if you have a $20k emergency fund and detailed service records proving religious oil changes and carbon cleaning—this is a financial hand grenade for the unprepared.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: AGM battery required; located under rear seat or trunk; high-performance start-stop system
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Every control module on the 2013-2017 Audi S8 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Two modules; memory positions lost on replacement. Massage/ventilation functions included.
Rear View Camera Control Module (RVC)0.5 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Trunk lid, integrated with camera
🔧 VCDS or Autel
⚠️ Calibration lines may need adjustment.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER · 22V178000
2022-03-23 · PE21009
Volkswagen Group of America, Inc. (Audi) is recalling certain 2013-2017 A8, S6 Sedan, S7, S8, and 2014-2017 RS7 vehicles. The turbocharger oil supply strainer can become blocked, causing wear to the bearings due to lack of lubrication.
Consequence: Worn bearings can cause the turbine wheel to contact the turbocharger housing or cause the shaft to break, causing an engine stall and increasing the risk of a crash.
Remedy: Dealers will replace the oil strainer and perform an oil change, free of charge. Owner notification letters were mailed August 4, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 21H7.
STRUCTURE:BODY:HOOD · 20V397000
2020-07-07
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2018 Audi S8 and A8 vehicles. The seal around the engine compartment may come loose and contact hot engine components.
Consequence: If the seal contacts hot engine components, there could be an increased risk of a fire.
Remedy: Audi will notify owners, and dealers will install a retaining plate to prevent the engine compartment seal from loosening. The recall began September 4, 2020. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 51G6.
FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS · 19V057000
2019-01-28
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2016 Audi A8 and S8 vehicles. The fuel supply line for the high pressure fuel pump may become porous and leak fuel.
Consequence: Leaking fuel, in the presence of an ignition source, increases the risk of fire.
Remedy: Audi has notified owners, and dealers will install a fuel pressure damper, free of charge. The recall began February 21, 2019. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 20BM.
Performance
Horsepower
605hp
Torque
517lb-ft
0–60 mph
3.5sec
Quarter mile
11.8sec
Top speed
155mph
Capability & size
Curb weight
4,795lb
Wiper blades
D4 generation (2013-2018). Sedan body style has no rear wiper.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2016 Audi S8 4.0L Twin-Turbo V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.