2021 Mitsubishi Shogun 2.4L Diesel · HS51 HJS

UK MOT analysis identifies corrosion and structure as the standout weakness of the Shogun Sport, far worse than same-age rivals. Mud and salt trapped underneath rot the rear subframe, chassis rails and suspension mounting points; structural corrosion is an MOT failure and can be expensive to weld or, in bad cases, uneconomic to repair. The RAC advises viewing the car on a ramp and checking for water-trapping mud and rock rash, and the spare wheel under the rear floor should be present and undamaged. Most examples are still young, so deep corrosion reveals a hard life off-road or on salted roads.

Owners of the 2.4-litre diesel have reported long cranking when cold and, in isolated cases, the engine cutting out at idle. Breakeryard identifies failed glow plugs as a known cause, making winter starts difficult and leaving the engine rough until warm; new plugs, and sometimes the relay, cure it. The RAC's used review likewise cites an owner report of idle cut-out, so this is not a one-off. On a viewing, start the engine from cold and walk away if it needs persistent cranking or misfires for the first minute.

The 2.4 DI-D's exhaust gas recirculation valve can clog with carbon, particularly on cars used for short trips or low-speed towing. Symptoms are sluggish acceleration, poor high-speed performance and sometimes black smoke under load. UK MOT data lists emissions and exhaust among the model's common problem areas, consistent with this pattern; cleaning or replacing the valve typically costs a few hundred pounds at an independent diesel specialist.