Diesel · 2018–now
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
All about the Audi A6 (C8)All about the 2.7 / 3.0 TDI V6 engine
The 3.0 TDI V6 engine was fitted to the Audi A6 (C8) (2018–now). In the EU that is 23.7 % of all new cars of this generation.
Versions: 3.0 286 hp, 3.0 245 hp, 3.0 231 hp.
The most expensive known risk is timing chain tensioners and chain stretch (chains at the rear): it usually appears at 180,000–300,000 km and costs €3,000–5,000 to fix.
✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Signs: Metallic rattle for a few seconds at cold start, later longer; camshaft / crankshaft sync fault codes
Fix: Check sync deviation values with diagnostics; replace the chain set with tensioners and guides (engine or gearbox out)
Signs: Ticking or knocking from the top of the engine, louder than normal diesel noise
Fix: Have it confirmed at an Audi / VW dealer (TPI 2043172) and ask for goodwill; replace the camshafts of the affected bank or all four
Signs: Engine light with a flap position fault (e.g. P2015), power loss or limp mode
Fix: Clean the manifold if the flaps are sound; otherwise replace the intake manifold or the flap actuator
Signs: Power loss, jerking, rough idle, EGR fault codes or limp mode; worse with short trips
Fix: Clean the EGR valve, cooler and passages; replace the valve or cooler if stuck or leaking
Signs: DPF warning, frequent or failed regenerations, limp mode
Fix: Check the pressure sensor and injectors first (worn injectors raise soot), then forced regeneration, cleaning or replacement
Signs: Rough idle, hard start, smoke, higher fuel use, frequent regenerations; leaking seals let soot into the valve cover
Fix: Check correction values and leak-off; renew the injector seals or replace worn injectors
Signs: Coolant loss without a puddle, burnt oil smell in the cabin, oil or coolant pooling between the cylinder heads
Fix: Find the source; replace the cracked coolant shut-off valve or renew the oil cooler seals
Signs: Reboots, camera or sensor faults
Fix: Software update at the dealer
Signs: Creak or knock when steering
Fix: Replace top mounts
Signs: Gearbox warning, odd or even gears (1-3-5 or 2-4-R) drop out, delayed or wrong shifts, limp mode or no drive
Fix: Diagnose with a dealer-level tester; repair the control unit / solenoids or fit a reconditioned mechatronic unit, change the oil and filter and run the adaptations
Signs: Knock or jerk when shifting down into 3rd or 2nd in traffic, a pause of 1-3 seconds before the car pulls away
Fix: Ask the dealer for the latest gearbox software, change the oil and filter and reset the adaptations; if it persists, have the mechatronic checked
Signs: Delayed or harsh shifts
Fix: Fluid service, repair
Typical routine maintenance cost for 100,000 km: €2,450–6,000. Sum of the services and wear parts in the plan above (about 15,000 km a year, independent workshop), without faults.
Intervals and typical prices for the Audi A6 (C8) with the 3.0 TDI V6 engine. The app gives the exact plan for your mileage.
| Item | Interval | Typical price |
|---|---|---|
| DPF health check (soot / ash load)Emissions | every 20,000 km | €0–60 |
| Engine oil + oil filterEngine | every 15,000 km or every 12 months | €70–150 |
| Cabin (pollen) filterClimate | every 15,000 km or every 12 months | €15–40 |
| Brake fluidBrakes | every 24 months | €50–95 |
| A/C service (regas + desiccant)Climate | every 24 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Fuel filterFuel | every 30,000 km or every 24 months | €40–110 |
| DSG/DCT oil + filterTransmission | every 60,000 km | €70–250 |
| Glow plugsEngine | every 100,000 km | €120–300 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Timing chain inspection (listen on cold start)Engine | every 150,000 km | €0–120 |
| Front brake padsBrakes | usually at 30,000–60,000 km | €60–150 |
| Front brake discs + padsBrakes | usually at 60,000–120,000 km | €150–320 |
| Rear brake padsBrakes | usually at 50,000–90,000 km | €50–130 |
| Tyres (set of 4)Wheels | usually at 40,000–60,000 km | €320–700 |
| Wiper bladesBody | checked at service | €20–50 |
| 12V batteryElectrical | checked at service | €100–220 |
| Version | Share | Years | CO₂ | Fuel use |
|---|---|---|---|---|
| 3.0 Hybrid2,967 cm³ · 210 kW (286 hp) | 7.8 % | 2019–2025 | 185 g/km | 6.9 L |
| 3.0 Hybrid2,967 cm³ · 180 kW (245 hp) | 4.1 % | 2021–2025 | 175 g/km | 6.7 L |
| 3.0 Diesel2,967 cm³ · 210 kW (286 hp) | 3.7 % | 2019–2024 | 191 g/km | 6.9 L |
| 3.0 Diesel2,967 cm³ · 170 kW (231 hp) | 3.3 % | 2019–2021 | 190 g/km | 7.2 L |
Source: European Environment Agency (EEA), monitoring of CO₂ emissions from new passenger cars, CC BY 4.0. CO₂ and fuel use are official type-approval values (WLTP from 2021), not real-world consumption.
Recalls the manufacturer published in the United Kingdom for this model (14). The same recalls usually apply across Europe. Ask an authorised dealer to check by VIN whether your car is affected and whether the work has been done.
The faults with the highest risk: timing chain tensioners and chain stretch (chains at the rear) (180,000–300,000 km, €3,000–5,000); piezo injector wear or leaking injector seals (180,000–300,000 km, €400–2,500); DPF clogging on short-trip cars (120,000–250,000 km, €150–2,000); intake manifold swirl flaps stick or wear (120,000–220,000 km, €600–1,500).
Chain.
5W-30 · VW 507.00 · ~6.0–8.0 L · every 15,000 km.
Audi A6 (C7) 2011–2018Audi A5 (8T) 2007–2016Audi A6 (C6) 2004–2011Audi Q5 (8R) 2008–2017Audi Q7 (4M) 2015–Porsche Cayenne (958 / 9Y0) 2010–Volkswagen Touareg II 2010–2018Porsche Panamera 2009–Audi Q8 (4M) 2018–Volkswagen Touareg III 2018–
Main sources for the faults of this engine:
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles. How we check the data →
Updated 29/10/2026