Nissan X-Trail T31

Turbocharged two-litre common-rail diesel with strong pull — around 150 to 177 hp and plenty of torque low down. Composed in daily use, but not a worry-free unit. Early builds before 2011 suffer turbo failures, and automatic variants saw premature conrod bearing wear — oil change intervals are sacred. Injectors and the high-pressure pump wear with mileage, and the particulate filter clogs on short runs. The EGR cooler with its pressure valve and the turbo oil return line are known to leak. A complete service record and regular long-distance running are the best insurance.

• !! Connecting rod bearing early failure with automatic from 40,000 km

  Early M9R variants with automatic gearbox show connecting rod bearing failure at very low mileage (14,000–57,000 km). Nissan extended the warranty to 150,000 km and issued internal technical bulletins.

  Symptoms: Metallic knocking from the engine, sudden engine failure, oil pressure warning light, engine will not turn over.
  1,000–7,000 $
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• !! Turbocharger failure before 2011 build year from 100,000 km

  Pre-revision M9R engines (before 2011) show frequent turbocharger failures occurring in conjunction with the connecting rod bearing damage. The revised version from 2011 is significantly more reliable.

  Symptoms: Whistling or rattling turbo noise, blue smoke, severe power loss, limp mode.
  1,200–3,000 $
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• !! Timing chain stretch, tensioner rail wear from 200,000 km

  At higher mileage the M9R timing chain stretches, sprockets and tensioner rails wear out. In the worst case the chain jumps. Replacement is labour-intensive and usually requires removing the engine (except the Espace).

  Symptoms: Rattling or clattering on cold start, juddering when cranking, tractor-like knocking from shifted valve timing, power loss.
  1,500–3,000 $
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+ 4 more engine weaknesses + vehicle weaknesses

Sturdy naturally aspirated 2.0L with a timing chain from the MR family, putting out roughly 141 to 144 hp. Torque sits higher in the rev range, so it feels lazy down low. Generally long-lived, but the chain can stretch if oil changes get neglected, with engine damage possible in the worst case. Elevated oil consumption traces back to the crankcase ventilation and worn valve stem seals. The camshaft sensor and thermostat fail occasionally. Keep an eye on the oil level and this unit will run for ages.

• !! Timing chain stretched — engine damage possible from 110,000 km

  In the MR20DE the timing chain stretches prematurely and can jump a tooth. The result is severe engine damage from piston-to-valve contact. Nissan extended the warranty to 150,000 km.

  Symptoms: Rattling from the timing chain area on cold start, check engine light, starting difficulties, rough running.
  800–2,500 $
  Ad Timing chain MR20DETiming chain tensioner Nissan 2.0Timing chain kit MR20DETiming chain guide MR20DE
• !! Elevated oil consumption from crankcase ventilation from 130,000 km

  The MR20DE crankcase ventilation is prone to failure, significantly increasing oil consumption. Alternatively, worn valve stem seals at higher mileage can also drive up oil consumption.

  Symptoms: Dropping oil level, blue smoke when accelerating or on overrun, oil mist in intake system.
  200–1,500 $
  Ad Crankcase ventilation MR20DEValve stem seals Nissan 2.0PCV valve MR20DE
• !! CVT gearbox oil cooler leaking from 120,000 km

  In the MR20DE with CVT automatic the gearbox oil cooler can start leaking. Mixing of coolant and gearbox oil causes gearbox damage if not detected early.

  Symptoms: Grinding or humming noises while driving, gearbox oil changes colour and consistency, gear shunting.
  1,500–4,000 $
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+ 3 more engine weaknesses + vehicle weaknesses

The QR25DE is a 2.5L four-cylinder with a timing chain and balance shafts, built in the millions worldwide. It is known for noticeable oil consumption in the first generation (pre-2013, sometimes 1l per 1,000 km) and for catalytic converter breakdown, where an intake leak draws ceramic particles back toward the cylinders and causes bore wear. Later variants with revised piston rings and a changed PCV routing are far less troublesome.

• !! Intake manifold swirl flap screws come loose from 80,000 km

  The lower intake manifold of the QR25DE contains four swirl flaps whose retaining screws can loosen and be sucked into the engine. This causes severe engine damage. Affects all QR25DE except the 2006 model year.

  Symptoms: Sudden engine noise, severe power loss, increased oil consumption; in the worst case engine seizure
  1,500–5,000 $
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• !! Pre-catalyst disintegration elevates oil consumption from 100,000 km

  The QR25DE runs rich, causing the pre-catalyst integrated in the exhaust manifold to overheat and disintegrate. The substrate fragments damage cylinder walls and piston rings, leading to severely elevated oil consumption.

  Symptoms: Steadily increasing oil consumption, possibly knocking noises; power loss; exhaust smell in cabin
  800–3,500 $
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• !! Cylinder head/gasket failure from 180,000 km

  At higher mileages, cylinder head cracks or head gasket failure can occur on the QR25DE in the X-Trail T30. The typical cause is localised overheating from coolant loss or thermostat problems. Repair costs approximately €1,500.

  Symptoms: Coolant loss without visible leak, water in cylinders, overheating gauge
  1,200–2,500 $
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+ 8 more engine weaknesses + vehicle weaknesses