2.7 Biturbo
Audi · 2.7 Biturbo V6 (AGB/AZB/ASJ)
1999–2005
"C5 S4/RS4, B5 S4. Twin K03/K04 turbos. Turbo failure common. Oil sludge if neglected. Coolant pipes. RS4 variant hugely powerful but maintenance-intensive. Specialist only."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
Twin turbo failure (K03/K04)
▸Boost loss, smoke, whining
Two turbos = double the failure risk. Labour-intensive replacement.
Δίδυμα turbo — €1,500-4,000. Εξειδικευμένο συνεργείο.
Oil sludge formation
▸Low oil pressure, sludge in valve cover
Same as 1.8T — extended intervals cause sludge.
Λάσπη λαδιού — αλλαγή κάθε 8-10k km.
Models with 2.7 Biturbo 2
Related Guides
Other Audi Engines
Tuning Potential
400hp+ Stage 1 (RS4)
Frequently Asked Questions
Is the Audi 2.7 Biturbo reliable?
The Audi 2.7 Biturbo scores 55/100 with a verdict of CAUTION. It has 2 documented issues with total repair costs between €2,000 and €6,000.
What are the common problems with the 2.7 Biturbo?
The most common issues are:
- Twin turbo failure (K03/K04) — critical, repair cost €1,500–€4,000, 80,000 km–150,000 km
- Oil sludge formation — high, repair cost €500–€2,000, 60,000 km–120,000 km
How much does it cost to repair the 2.7 Biturbo?
Total potential repair costs for all 2 known issues range from €2,000 to €6,000. The most expensive issue is typically .
What years was the 2.7 Biturbo produced?
The Audi 2.7 Biturbo was produced from 1999 to 2005. It is a 2671cc V6 petrol turbo engine.
Scores are calculated from documented issues, repair costs, and failure patterns across thousands of owner reports and technical sources. Learn about our methodology. Always inspect before you buy.