Nissan X-Trail
1.5L VC-Turbo with variable compression ratio — innovative but complex. Used purely as a generator in the e-POWER system.
e-Power makes the T33 more modern
163 hp electric drive with petrol engine as generator — direct and quiet, solid everyday performance.
Engine Weaknesses 4
The KR15DDT VC-Turbo can develop faults in the main bearings and the L-link of the variable compression mechanism. In severe cases metal swarf is found in the oil sump. The NHTSA opened an investigation into engine failures.
Symptoms: Sudden engine failure, metal swarf in oil, oil pressure warning light, knocking from engine, complete engine shutdown
The complex variable compression mechanism includes actuators and sensors that can fail at high mileage. Repairs require specialist knowledge and are only possible at Nissan authorised workshops.
Symptoms: Check engine light, restricted engine power, irregular combustion, limp mode
The KR15DDT timing chain is by design relatively slender and can rattle earlier than usual. A preventive replacement around 150,000 km is advisable. A broken chain causes total engine failure.
Symptoms: Rattling on cold start, metallic chattering on load changes, engine stumbling
Since the KR15DDT uses only direct injection, the intake valves are not washed by fuel. Carbon deposits build up from around 50,000 km. Walnut blasting every 60,000–80,000 km recommended.
Symptoms: Rough idle, poor throttle response, power loss, increased fuel consumption, cold start problems