4.0 TDI V8
Audi · 4.0 TDI V8 (BTR/CCFC/CDSB)
2003–2012
"D3 A8, Q7. V8 diesel — enormous torque. Complex. Timing chain. 8 injectors = expensive. DPF. Linked to Dieselgate (CDSB). Specialist only. Parts costs astronomical."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
Timing chain complexity
▸Rattle, codes
V8 timing chain system. Very expensive.
Αλυσίδα V8 — ΠΟΛΥ ΑΚΡΙΒΟ. €2,000-6,000.
Injector failure (8 injectors)
▸Rough idle, smoke
8 CR injectors = astronomical cost.
8 μπεκ V8 — €1,500-4,000.
Models with 4.0 TDI V8 3
Related Guides
Other Audi Engines
Tuning Potential
450hp Stage 1
Frequently Asked Questions
Is the Audi 4.0 TDI V8 reliable?
The Audi 4.0 TDI V8 scores 52/100 with a verdict of CAUTION. It has 2 documented issues with total repair costs between €3,500 and €10,000.
What are the common problems with the 4.0 TDI V8?
The most common issues are:
- Timing chain complexity — critical, repair cost €2,000–€6,000, 80,000 km–150,000 km
- Injector failure (8 injectors) — high, repair cost €1,500–€4,000, 100,000 km–200,000 km
What cars use the Audi 4.0 TDI V8?
How much does it cost to repair the 4.0 TDI V8?
Total potential repair costs for all 2 known issues range from €3,500 to €10,000. The most expensive issue is typically .
What years was the 4.0 TDI V8 produced?
The Audi 4.0 TDI V8 was produced from 2003 to 2012. It is a 4134cc V8 diesel 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.