Air suspension (compressor, air springs)
usually 100,000–200,000 km · Medium risk
Signs: Suspension warning, the car sits low or drops overnight
Fix: Replace the leaking air spring; a worn compressor usually follows a leak
€600–2,500
Common faults, service intervals and costs
Audi Q8 (4M)
2018–now
3
engines covered
9
known faults
4,285
roadworthiness tests in the statistics
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
The Audi Q8 (4M) has been built since 2018.
For this generation we cover 3 engines and 9 known faults, each with the mileage range where it usually appears.
The most expensive known risk is Timing chain wear: it usually appears at 150,000–250,000 km and costs €3,000–5,000 to fix.
In UK roadworthiness tests in 2024, at 50–100 thousand km this model most often failed on: tyres and wheels (5.2 %), lights, wipers and visibility (1.3 %), exhaust, emissions and leaks (1.1 %). It fails less often than average on: brakes, lights, wipers and visibility.
Engines
| Engine | Fuel | Timing drive | Oil |
|---|---|---|---|
| 2.7 / 3.0 TDI V6 | Diesel | Chain | 5W-30 · VW 507.00 · ~6.0–8.0 L · every 15,000 km |
| 1.8 / 2.0 TSI / TFSI (EA888) | Petrol | Chain | 5W-30 / 5W-40 · VW 504.00 / 502.00 · ~4.6–5.7 L · every 15,000 km |
| 4.0 TFSI V8 twin-turbo (Audi / Porsche / Bentley) | Petrol | Chain | 0W-30 / 5W-30 · VW 502.00 / 504.00 · ~8.3–9.5 L · every 15,000 km |
Faults typical of this model
Faults by engine
2.7 / 3.0 TDI V6
Timing chain wear
usually 150,000–250,000 km · High risk
Signs: Rattle at rear of engine
Fix: Replace chains (gearbox off)
€3,000–5,000
EGR / DPF
usually 120,000–200,000 km · Medium risk
Signs: Limp mode
Fix: Clean or replace
€400–1,800
1.8 / 2.0 TSI / TFSI (EA888)
Water pump / thermostat housing leak
usually 70,000–140,000 km · Medium risk
Signs: Coolant loss, overheating warning
Fix: Replace the pump + thermostat module
€400–800
PCV valve failure
usually 60,000–120,000 km · Wear part
Signs: Whistle at idle, lean codes, oil leaks
Fix: Replace PCV / oil separator
€100–250
Carbon build-up on intake valves
usually 100,000–180,000 km · Medium risk
Signs: Rough idle, misfires (direct injection)
Fix: Walnut blasting
€300–600
Timing chain tensioner (pre-2013)
usually 80,000–160,000 km · High risk
Signs: Rattle on start; early engines only
Fix: Upgraded tensioner and chain
€1,000–2,000
4.0 TFSI V8 twin-turbo (Audi / Porsche / Bentley)
Oil separator (PCV) failure
usually 80,000–160,000 km · Medium risk
Signs: Whistling, rough idle, rising oil consumption
Fix: Replace the oil separator
€300–800
Gearboxes
Automatic (Aisin / ZF Tiptronic)
Torque converter / valve body
usually 150,000–250,000 km · Wear part
Signs: Delayed or harsh shifts
Fix: Fluid service, repair
€300–2,500
Scheduled service
Intervals and typical prices for the 2.7 / 3.0 TDI V6 engine. Other engines differ in oil, timing drive and some filters; the app gives the exact plan.
| Item | Interval | Typical price |
|---|---|---|
| DPF health check (soot / ash load)Emissions | every 20,000 km | €0–60 |
| Transfer case / rear differential oilTransmission | every 80,000 km | €60–160 |
| 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 |
| Automatic transmission fluidTransmission | every 90,000 km | €200–450 |
| 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 |
Roadworthiness tests by mileage
Share of tests in the United Kingdom (DVSA MOT, 2024) that this model failed because of each system. Bold red means more often and green less often than an average car of the same age and mileage. Sample: 4,285 tests.
| thousand km | 0–50 | 50–100 | 100–150 |
|---|---|---|---|
| Brakes | 0.4 % | 0.9 % | 1.4 % |
| Suspension | 0.3 % | 0.4 % | 0.5 % |
| Steering | 0.0 % | 0.0 % | 0.0 % |
| Tyres and wheels | 4.3 % | 5.2 % | 5.3 % |
| Lights, wipers and visibility | 1.9 % | 1.3 % | 1.9 % |
| Body and corrosion | 0.3 % | 0.1 % | 0.2 % |
| Exhaust, emissions and leaks | 0.9 % | 1.1 % | 1.8 % |
Roadworthiness tests in the Netherlands by age
Share of this model's Dutch fleet that had a defect in each system at a roadworthiness test (APK) in 2025. Bold red means more often and green less often than an average car of the same age and fuel. Sample: 2,083 cars.
| age (years) | 3–5 | 6–8 |
|---|---|---|
| Brakes | 0.2 % | 0.5 % |
| Suspension | 0.0 % | 0.3 % |
| Steering | 0.0 % | 0.0 % |
| Tyres and wheels | 5.6 % | 10.0 % |
| Lights, wipers and visibility | 2.0 % | 5.8 % |
| Body and corrosion | 0.0 % | 0.2 % |
| Exhaust, emissions and leaks | 0.1 % | 0.0 % |
Most common engine versions in the EU
New cars of this generation registered in the EU, Iceland and Norway 2010–2025: 80,054, of which 494 in Croatia. The share shows how common each version is.
| Version | Share | Years | CO₂ | Fuel use |
|---|---|---|---|---|
| 2.7 / 3.0 TDI V63.0 (2,967 cm³) · 210 kW (286 hp) · Hybrid | 47.0 % | 2019–2025 | 223 g/km | 8.4 L |
| 3.0 Hybrid3.0 (2,995 cm³) · 250 kW (340 hp) · Hybrid | 29.8 % | 2019–2025 | 94 g/km | 3.9 L |
| 2.7 / 3.0 TDI V63.0 (2,967 cm³) · 210 kW (286 hp) · Diesel | 14.2 % | 2018–2025 | 225 g/km | 8.4 L |
| 2.7 / 3.0 TDI V63.0 (2,967 cm³) · 170 kW (231 hp) · Hybrid | 5.9 % | 2019–2025 | 219 g/km | 8.0 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.
Common questions
Does the Audi Q8 (4M) have a timing chain or a timing belt?
2.7 / 3.0 TDI V6: chain; 1.8 / 2.0 TSI / TFSI (EA888): chain; 4.0 TFSI V8 twin-turbo (Audi / Porsche / Bentley): chain.
What are the known problems with the Audi Q8 (4M)?
The faults with the highest risk: timing chain wear (150,000–250,000 km, €3,000–5,000); timing chain tensioner (pre-2013) (80,000–160,000 km, €1,000–2,000); air suspension (compressor, air springs) (100,000–200,000 km, €600–2,500); EGR / DPF (120,000–200,000 km, €400–1,800). The full list by engine is on this page.
What does the Audi Q8 (4M) most often fail its roadworthiness test on?
In UK roadworthiness tests in 2024, at 50–100 thousand km this model most often failed on: tyres and wheels (5.2 %), lights, wipers and visibility (1.3 %), exhaust, emissions and leaks (1.1 %). It fails less often than average on: brakes, lights, wipers and visibility.
What should you check when buying a used Audi Q8 (4M)?
Before you buy, ask an authorised dealer to check by VIN whether the car has any open recalls. On the test drive, watch for these signs: rattle at rear of engine; rattle on start. The full checklist is in the guide to buying a used car.
Other generations
Audi Q2 2016–Audi Q3 (8U) 2011–2018Audi Q3 (F3) 2018–Audi Q5 (8R) 2008–2017Audi Q5 (FY) 2017–Audi Q7 (4L) 2006–2015Audi Q7 (4M) 2015–Audi Q4 e-tron 2021–Audi Q6 e-tron 2024–
Models with the same engines
These models share engines with this car, so they share some of its faults too.
Audi A4 (B9) 2015–2024Audi A6 (C7) 2011–2018Audi A6 (C8) 2018–Audi A5 (F5) 2016–2024Audi A1 (GB) 2018–Porsche Cayenne (958 / 9Y0) 2010–Porsche Macan 2014–Audi A7 (4G) 2010–2018
Other Audi models
Audi A7 (4K) 2018–Audi e-tron / Q8 e-tron 2018–Audi A8 (D5) 2017–Audi A3 (8Y) 2020–Audi e-tron GT 2021–Audi RS 3 (8V) 2015–2020Audi RS 3 (8Y) 2021–Audi A3 (8V) 2012–2020Audi A5 (B10) 2024–Audi A1 (8X) 2010–2018
Sources and notes
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.
Updated 08/10/2026