2018 Nissan Navara 2.3L Diesel · PO68 XAP

On early NP300 models with the 2.3 dCi engine, the lower radiator coolant hose runs in tight proximity to the engine accessory drive and air conditioning compressor pulley. Due to engine movement under torque or slight misalignment of the factory hose clips, the hose can rub directly against the spinning A/C pulley. Over time, friction wears a hole through the rubber wall, causing sudden loss of coolant, rapid engine overheating, and potential cylinder head damage if the driver does not pull over immediately.

The Renault-Nissan 2.3 dCi (YS23DDT single-turbo and YS23DDTT twin-turbo) diesel engine can experience premature turbocharger bearing wear and oil-seal failure. This is exacerbated by extended oil change intervals (up to 18,000 miles or 2 years under factory schedules), oil dilution from interrupted DPF regenerations, or heavy towing duties. As bearing play increases, the impeller blades contact the housing, generating a high-pitched siren whistle and passing oil into the intake, risking limp mode or diesel runaway.

Euro 6 versions of the 2.3 dCi fitted with Selective Catalytic Reduction (SCR) frequently suffer from AdBlue dosing errors, crystallisation of urea around the dosing injector, and inaccurate tank level readings. In the UK, DVSA recall campaign R/2023/194 was launched to update the AdBlue Dosing Control Module software to increase online dosing efficiency across 28,292 Nissan vehicles built between May 2016 and May 2019. Unresolved software glitches or clogged injectors trigger an engine restart countdown that immobilises the vehicle once expired.