2012 JAGUAR XJ AJ-V8 Gen III 5.0L supercharged/AJ-V8 Gen III 5.0L naturally aspirated (X351)
X351 / Sedan / Global with regional engine variations
AJ-V8 Gen III 5.0L superchargedAJ-V8 Gen III 5.0L naturally aspiratedAJ126 3.0L V6 dieselExact year/trim recordGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Rear air suspension failure in some units
- Electrical gremlins related to infotainment system
- Timing chain tensioner wear on V8 engines
First checks
- Verify air suspension compressor and bags
- Check for infotainment software updates
- Inspect timing chain for noise or wear on V8 vehicles
Before replacing parts
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- 2012 Jaguar XJ X351 was the flagship luxury sedan globally with minor market-specific engine availability.
- The 3.0L V6 diesel was offered mainly in Europe and select markets; petrol engines available globally.
- Oil capacity and fluids recommended vary slightly by engine and market; always confirm with local Jaguar documentation.