4.0 TDI V8 SQ7
Audi · 4.0 TDI V8 (CZAC/DCZF) SQ7/SQ8
2016–present
"SQ7/SQ8. Electric compressor + twin-turbo. Most complex diesel ever made. 48V system. EGR cooler. DPF/SCR. Phenomenal performance but any failure = very expensive."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 1
EGR cooler failure
▸Coolant loss, smoke
EGR cooler crack = coolant enters engine.
EGR cooler — €800-2,500. ΣΟΒΑΡΟ.
Models with 4.0 TDI V8 SQ7 1
Related Guides
Other Audi Engines
Tuning Potential
480hp Stage 1
Frequently Asked Questions
Is the Audi 4.0 TDI V8 SQ7 reliable?
The Audi 4.0 TDI V8 SQ7 scores 65/100 with a verdict of CAUTION. It has 1 documented issues with total repair costs between €800 and €2,500.
What are the common problems with the 4.0 TDI V8 SQ7?
The most common issues are:
- EGR cooler failure — high, repair cost €800–€2,500, 60,000 km–120,000 km
What cars use the Audi 4.0 TDI V8 SQ7?
The 4.0 TDI V8 SQ7 is found in:
- Q7 (2016–2020)
How much does it cost to repair the 4.0 TDI V8 SQ7?
Total potential repair costs for all 1 known issues range from €800 to €2,500. The most expensive issue is typically .
What years was the 4.0 TDI V8 SQ7 produced?
The Audi 4.0 TDI V8 SQ7 was produced from 2016 to present. It is a 3956cc 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.