The gas 5.6 is a solid sleeper; the Titan XD's discontinued 5.0 Cummins diesel is a parts-and-emissions risk. The badge hides two very different trucks.
The standard Titan with the 5.6 gas V8 is an underrated, reliable truck. The Titan XD offered a 5.0 Cummins V8 diesel that has since been discontinued, raising real questions about parts and support, and it carries the usual modern diesel emissions complexity. Step one is determining exactly which Titan you're looking at.
The discontinued diesel has emissions, injector, and turbo concerns plus long-term parts questions.
CHECK Scan emissions and after-treatment, check regen and DEF, and confirm service/parts availability.
The automatic can shift firmly or hunt depending on year and condition.
CHECK Road test through all gears for slip or harshness.
These trucks are known for premature rotor warping.
CHECK Road test for braking pulsation and measure rotor thickness.
Rear-end noise shows up on worked trucks.
CHECK Listen for diff whine on a road test.
Bidirectional OBD-II scan tool · Paint depth gauge · Tire tread depth gauge & DOT date decoder · Brake pad & rotor calipers / measurement tools · Battery & charging system tester · Compression and cylinder leak-down testers · Digital borescope · Floor jack and jack stands …
See the full Pre-Purchase Vehicle Inspection tool kit →
Pre-tagged for the Nissan Titan / Titan XD (2016–2024).