2015 Infiniti QX80 Problems: 1 Issues Every Owner Should Know
2015 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2015 Infiniti QX80 has 1 documented known issues, with 1 rated critical. The most serious is VK56VD Timing Chain Stretch ($2,000-$5,000 repair). Across all issues, repair costs range from $2,000 to $5,000. DIY maintenance guides at au7o.io.
All 1 Known Issues
On the 2011-2017 Infiniti QX80 5.6L VK56VD V8, the 5.6L VK56VD engine can develop timing chain stretch, particularly when oil changes are neglected. The primary and secondary timing chains elongate over time, causing rough idle, reduced power, and potential engine damage if not addressed.
Common Symptoms
- Rattling noise at cold start
- Check engine light with timing codes
- Rough idle
- Reduced engine power
How to Fix
Replace the timing chain, tensioners, and guides as a complete kit. This is a labor-intensive repair requiring significant engine disassembly. Strict adherence to 5,000-mile oil change intervals helps prevent premature chain wear.