Audi R8 4S — Problems & Common Faults

Five-litre V10 with direct petrol injection in the second evolution of this engine family, with very high revving character reaching into five-figure RPM territory. Oil consumption is a well-known issue with this unit — a need to top up roughly a litre every 1,600 to 2,400 kilometres is repeatedly reported by specialist workshops, caused by the piston ring design combined with the high operating temperatures of a free-revving naturally aspirated engine. As with any direct-injection unit, oil coking builds up on the intake valves over time, noticeable as a rough idle and loss of power; walnut shell blasting remedies this. Over time, cooling system seals can age, hoses wear out and the water pump can start leaking — check the coolant level regularly. For cars built between 2018/2019 and 2023, a mandatory recall concerning exhaust flap control is documented: a software update on both engine control units adjusts exhaust flap actuation and overrun fuel cut-off to newly interpreted regulatory requirements, which can result in an audibly quieter exhaust and a noticeable loss of power — check for proof the recall was carried out before buying. The specified oil requires the relevant long-life approval, with a fill capacity of around 8.3 litres.

• !! Chain Tensioner Pressure Loss (4 Timing Chains) from 120,000 km

  Gen2 V10 5.2 FSI has four timing chains. Chain tensioner pressure loss possible with overly long oil change intervals. Less common than Gen1 due to improved seal materials; remains a risk factor if neglected.

  Symptoms: Metallic rattle on cold start; disappears after a few seconds; if neglected, permanent chain rattle
  800–2,500 $
  Ad chain tensioner CSPB 5.2 V10timing chain R8 4S V10
• !! Recall 34J1: Gearbox Oil Vent Hose Fire Risk (2018)

  NHTSA recall 18V639000 for R8 model year 2018. Gearbox vent hose can lose oil at high speed, which may ignite on hot engine parts. Dealers replace single hose with double hose free of charge.

  Symptoms: No driver-noticeable symptom; possible smoke from engine bay during high-performance driving
  0–0 $
  Ad gearboxentlüftungsschlauch R8 4SS-Tronic breather hose R8 V10 Gen2
• !! S-Tronic Mechatronics / Clutch Pack Wear (Gen2) from 80,000 km

  7-speed S-Tronic (Gen2 onwards) shows clutch judder and shift shocks if gearbox oil change (interval: 60,000 km) is neglected. Mechatronics total failure costs 3,000–5,000 €. Mixing ATF+MTF internally causes irreversible total failure.

  Symptoms: Judder and shudder on pull-away or slow driving, shift hesitation or hard shift shocks, gearbox warning in instrument cluster
  1,500–5,000 $
  Ad S-Tronic clutchspaket R8 Gen2Mechatronik S-Tronic R8 4Stransmission fluid S-Tronic R8 V10 Gen2

+ 4 more engine weaknesses + vehicle weaknesses

Five-litre V10 with direct petrol injection in the second evolution of this engine family, with very high revving character reaching into five-figure RPM territory. Oil consumption is a well-known issue with this unit — a need to top up roughly a litre every 1,600 to 2,400 kilometres is repeatedly reported by specialist workshops, caused by the piston ring design combined with the high operating temperatures of a free-revving naturally aspirated engine. As with any direct-injection unit, oil coking builds up on the intake valves over time, noticeable as a rough idle and loss of power; walnut shell blasting remedies this. Over time, cooling system seals can age, hoses wear out and the water pump can start leaking — check the coolant level regularly. For cars built between 2018/2019 and 2023, a mandatory recall concerning exhaust flap control is documented: a software update on both engine control units adjusts exhaust flap actuation and overrun fuel cut-off to newly interpreted regulatory requirements, which can result in an audibly quieter exhaust and a noticeable loss of power — check for proof the recall was carried out before buying. The specified oil requires the relevant long-life approval, with a fill capacity of around 8.3 litres.

• !! Chain Tensioner Pressure Loss (4 Timing Chains) from 120,000 km

  Gen2 V10 5.2 FSI has four timing chains. Chain tensioner pressure loss possible with overly long oil change intervals. Less common than Gen1 due to improved seal materials; remains a risk factor if neglected.

  Symptoms: Metallic rattle on cold start; disappears after a few seconds; if neglected, permanent chain rattle
  800–2,500 $
  Ad chain tensioner CSPB 5.2 V10timing chain R8 4S V10
• !! Recall 34J1: Gearbox Oil Vent Hose Fire Risk (2018)

  NHTSA recall 18V639000 for R8 model year 2018. Gearbox vent hose can lose oil at high speed, which may ignite on hot engine parts. Dealers replace single hose with double hose free of charge.

  Symptoms: No driver-noticeable symptom; possible smoke from engine bay during high-performance driving
  0–0 $
  Ad gearboxentlüftungsschlauch R8 4SS-Tronic breather hose R8 V10 Gen2
• !! S-Tronic Mechatronics / Clutch Pack Wear (Gen2) from 80,000 km

  7-speed S-Tronic (Gen2 onwards) shows clutch judder and shift shocks if gearbox oil change (interval: 60,000 km) is neglected. Mechatronics total failure costs 3,000–5,000 €. Mixing ATF+MTF internally causes irreversible total failure.

  Symptoms: Judder and shudder on pull-away or slow driving, shift hesitation or hard shift shocks, gearbox warning in instrument cluster
  1,500–5,000 $
  Ad S-Tronic clutchspaket R8 Gen2Mechatronik S-Tronic R8 4Stransmission fluid S-Tronic R8 V10 Gen2

+ 4 more engine weaknesses + vehicle weaknesses

Final development stage of the second-generation 5.2-litre direct-injection (FSI) V10, based on the technology and platform of an Italian sister model. Output was raised again compared with the original version. Direct injection causes carbon build-up on the intake valves over time — manual cleaning roughly every 30,000 km or mechanical walnut-shell blasting roughly every 60,000 km keeps the intake tracts clear. Ignition coils fail more frequently after 45,000 to 60,000 km, showing up as misfires, a rough idle and warning lights. The hydraulic timing chain tensioner should be replaced pre-emptively around the 50,000 km mark, since a rattle on cold start points to insufficient oil pressure at the tensioner or a stretched chain — in the worst case pistons and valves collide. Intake manifold flaps can fail and trigger misfire fault codes. Oil consumption rises with mileage as cylinder walls and piston rings wear. The specified oil meets VW 502 00, or VW 504 00 with Longlife approval, with a fill quantity of around 8.3 litres.

• !! Chain Tensioner Pressure Loss (4 Timing Chains) from 120,000 km

  Gen2 V10 5.2 FSI has four timing chains. Chain tensioner pressure loss possible with overly long oil change intervals. Less common than Gen1 due to improved seal materials; remains a risk factor if neglected.

  Symptoms: Metallic rattle on cold start; disappears after a few seconds; if neglected, permanent chain rattle
  800–2,500 $
  Ad chain tensioner CSPB 5.2 V10timing chain R8 4S V10
• !! S-Tronic Mechatronics / Clutch Pack Wear (Gen2) from 80,000 km

  7-speed S-Tronic (Gen2 onwards) shows clutch judder and shift shocks if gearbox oil change (interval: 60,000 km) is neglected. Mechatronics total failure costs 3,000–5,000 €. Mixing ATF+MTF internally causes irreversible total failure.

  Symptoms: Judder and shudder on pull-away or slow driving, shift hesitation or hard shift shocks, gearbox warning in instrument cluster
  1,500–5,000 $
  Ad S-Tronic clutchspaket R8 Gen2Mechatronik S-Tronic R8 4Stransmission fluid S-Tronic R8 V10 Gen2
• ! Elevated Oil Consumption at High Mileages from 150,000 km

  Gen2 V10 occasionally shows elevated oil consumption at high mileages due to ageing valve stem seals. Better than Gen1 due to new manufacturing tolerances. No valve carbon from dual injection, so oil not contaminated by residue.

  Symptoms: Slightly increased oil consumption, occasional blue smoke on cold start
  1,200–3,500 $
  Ad valve stem seal Gen2 V10 5.2engine oil R8 4S Verbrauch

+ 2 more engine weaknesses + vehicle weaknesses

Top state of tune of the five-litre naturally aspirated V10 with direct petrol injection for the performance variant of this range. Oil consumption tends to be even more noticeable here than on the base version according to specialist workshops — a need to top up roughly a litre every 1,600 kilometres is frequently reported, caused by the piston ring design of this free-revving naturally aspirated engine. Direct injection leads to oil coking on the intake valves over time, resulting in a rough idle and loss of power; in stubborn cases, deposits can even affect the injectors themselves. Walnut shell blasting of the valves is the established remedy. Cooling system seals and hoses age over time, and a leaking water pump is not uncommon — keep an eye on the coolant level. For cars built between 2018/2019 and 2023, a mandatory recall covering exhaust flap control applies: a software update on both engine control units adjusts exhaust flap actuation and overrun fuel cut-off to newly interpreted regulatory requirements — an audibly quieter sound and a noticeable loss of power can result. Always check for proof the recall was carried out before buying. The specified oil requires the relevant long-life approval, with a fill capacity of around 8.3 litres.

• !! Chain Tensioner Pressure Loss (4 Timing Chains) from 120,000 km

  Gen2 V10 5.2 FSI has four timing chains. Chain tensioner pressure loss possible with overly long oil change intervals. Less common than Gen1 due to improved seal materials; remains a risk factor if neglected.

  Symptoms: Metallic rattle on cold start; disappears after a few seconds; if neglected, permanent chain rattle
  800–2,500 $
  Ad chain tensioner CSPB 5.2 V10timing chain R8 4S V10
• !! Recall 34J1: Gearbox Oil Vent Hose Fire Risk (2018)

  NHTSA recall 18V639000 for R8 model year 2018. Gearbox vent hose can lose oil at high speed, which may ignite on hot engine parts. Dealers replace single hose with double hose free of charge.

  Symptoms: No driver-noticeable symptom; possible smoke from engine bay during high-performance driving
  0–0 $
  Ad gearboxentlüftungsschlauch R8 4SS-Tronic breather hose R8 V10 Gen2
• !! S-Tronic Mechatronics / Clutch Pack Wear (Gen2) from 80,000 km

  7-speed S-Tronic (Gen2 onwards) shows clutch judder and shift shocks if gearbox oil change (interval: 60,000 km) is neglected. Mechatronics total failure costs 3,000–5,000 €. Mixing ATF+MTF internally causes irreversible total failure.

  Symptoms: Judder and shudder on pull-away or slow driving, shift hesitation or hard shift shocks, gearbox warning in instrument cluster
  1,500–5,000 $
  Ad S-Tronic clutchspaket R8 Gen2Mechatronik S-Tronic R8 4Stransmission fluid S-Tronic R8 V10 Gen2

+ 4 more engine weaknesses + vehicle weaknesses

Second-generation 5.2-litre direct-injection (FSI) V10 that shares its technology and platform with an Italian sister model. In this version the all-wheel-drive system is omitted, making the front end noticeably lighter and giving the car a more rear-biased driving character. Direct injection causes carbon build-up on the intake valves over time — manual cleaning roughly every 30,000 km or mechanical walnut-shell blasting roughly every 60,000 km keeps the intake tracts clear. Ignition coils fail more frequently after 45,000 to 60,000 km, showing up as misfires, a rough idle and warning lights. The hydraulic timing chain tensioner should be replaced pre-emptively around the 50,000 km mark — a rattle on cold start points to insufficient oil pressure at the tensioner or a stretched chain and needs checking immediately. Oil consumption rises with mileage as cylinder walls and piston rings wear. The specified oil meets VW 502 00, or VW 504 00 with Longlife approval.

• !! Chain Tensioner Pressure Loss (4 Timing Chains) from 120,000 km

  Gen2 V10 5.2 FSI has four timing chains. Chain tensioner pressure loss possible with overly long oil change intervals. Less common than Gen1 due to improved seal materials; remains a risk factor if neglected.

  Symptoms: Metallic rattle on cold start; disappears after a few seconds; if neglected, permanent chain rattle
  800–2,500 $
  Ad chain tensioner CSPB 5.2 V10timing chain R8 4S V10
• !! S-Tronic Mechatronics / Clutch Pack Wear (Gen2) from 80,000 km

  7-speed S-Tronic (Gen2 onwards) shows clutch judder and shift shocks if gearbox oil change (interval: 60,000 km) is neglected. Mechatronics total failure costs 3,000–5,000 €. Mixing ATF+MTF internally causes irreversible total failure.

  Symptoms: Judder and shudder on pull-away or slow driving, shift hesitation or hard shift shocks, gearbox warning in instrument cluster
  1,500–5,000 $
  Ad S-Tronic clutchspaket R8 Gen2Mechatronik S-Tronic R8 4Stransmission fluid S-Tronic R8 V10 Gen2
• ! Elevated Oil Consumption at High Mileages from 150,000 km

  Gen2 V10 occasionally shows elevated oil consumption at high mileages due to ageing valve stem seals. Better than Gen1 due to new manufacturing tolerances. No valve carbon from dual injection, so oil not contaminated by residue.

  Symptoms: Slightly increased oil consumption, occasional blue smoke on cold start
  1,200–3,500 $
  Ad valve stem seal Gen2 V10 5.2engine oil R8 4S Verbrauch

+ 2 more engine weaknesses + vehicle weaknesses