3.2 FSI V6 (AUK/BKH)
2004–2008 · petrol · 3123cc · 255hp
Engine codes: AUK, BKH
Reliability, common problems and owner reviews for the Audi A6 C6 3.2 FSI V6 (AUK/BKH). Check this before you buy used.
The 3.2 FSI V6 — smooth and a sensible choice for low-mileage owners wanting longevity, but direct injection brings carbon fouling and, critically, leaking injectors can score the cylinder walls (expensive). Maintenance is pricey but the engine is durable when looked after.
Known Issues
Faulty/leaking injectors wash the bores and can score the cylinder walls.
Fix / Workaround: Replace failing injectors early; check compression.
Repair cost: €400–€3000
Typically appears after: 150,000 km
DI carbon on intake valves.
Fix / Workaround: Walnut blast.
Repair cost: €150–€400
Typically appears after: 130,000 km
Mileage Thresholds
After 150,000 km: Injector/carbon attention.
Pre-Purchase Checklist
- ☐Scan for injector codes; check compression
- ☐Intake decarbonising history
- ☐Pricey but durable
Frequently asked questions
Is the Audi A6 C6 3.2 FSI V6 (AUK/BKH) reliable?
Maint. Sensitive — The 3.2 FSI V6 — smooth and a sensible choice for low-mileage owners wanting longevity, but direct injection brings carbon fouling and, critically, leaking injectors can score the cylinder walls (expensive). Maintenance is pricey but the engine is durable when looked after.
What are the common problems and reviews for the Audi A6 C6 3.2 FSI V6 (AUK/BKH)?
The most commonly reported problems: Cylinder wall scoring (leaking injectors), Carbon fouling (DI).
Is a used Audi A6 C6 3.2 FSI V6 (AUK/BKH) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.