3.0 TDI V6 quattro (ASB/CDYA)
2004–2011 · diesel · 2967cc · 233hp
Engine codes: ASB, CDYA, BMK
Reliability, common problems and owner reviews for the Audi A6 C6 3.0 TDI V6 quattro (ASB/CDYA). Check this before you buy used.
The 3.0 TDI quattro — widely regarded as the reference modern diesel of its day: strong, smooth and durable with regular (15,000 km) oil changes. The post-2008 versions are especially solid. Watch intake carbon/EGR and DPF, plus high running costs, but the core engine is excellent.
Known Issues
Carbon and EGR clogging on the intake with age.
Fix / Workaround: Clean intake/EGR.
Repair cost: €200–€800
Typically appears after: 180,000 km
DPF blocks on short trips.
Fix / Workaround: Motorway runs; clean/replace.
Repair cost: €300–€1200
Mileage Thresholds
After 250,000 km: Durable with 15k-km oil changes.
Pre-Purchase Checklist
- ☐Regular (15k km) oil-change history
- ☐DPF/EGR history; prefer motorway use
- ☐The reference C6 diesel
Frequently asked questions
Is the Audi A6 C6 3.0 TDI V6 quattro (ASB/CDYA) reliable?
Reliable — The 3.0 TDI quattro — widely regarded as the reference modern diesel of its day: strong, smooth and durable with regular (15,000 km) oil changes. The post-2008 versions are especially solid. Watch intake carbon/EGR and DPF, plus high running costs, but the core engine is excellent.
What are the common problems and reviews for the Audi A6 C6 3.0 TDI V6 quattro (ASB/CDYA)?
The most commonly reported problems: Intake carbon / EGR, DPF clogging.
Is a used Audi A6 C6 3.0 TDI V6 quattro (ASB/CDYA) worth buying?
Minor issues only, easy to maintain, no design flaws. A safe used buy.