IsItAGoodCar
Reliability Guide

Common Problems with the
2018 Mitsubishi Shogun Mk4

We've identified 3 known issues that can affect the 2018 Mitsubishi Shogun Mk4. 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

Rear Subframe Structural Rust

SeriousBodywork & Rust

While the Mk4 has better rust protection than the Mk3, the rear subframe and its mounting points remain highly susceptible to structural rot in the UK.

Est. Repair Cost: £600–£2,000
Warning Signs:

Heavy flaking rust on the rear subframe, MOT failure for structural corrosion, Knocking from the rear suspension

What to Inspect:
  • Inspect the subframe where it mounts to the body; these areas can rot from the inside out
Verified by IsItAGoodCar Research Team

Super Select 4WD Vacuum or Solenoid Fault

ModerateGearbox & Transmission

Vacuum leaks, tired solenoids or seized actuators can stop the four-wheel-drive system engaging or disengaging properly, often with a flashing dash light.

Est. Repair Cost: £150–£800
Warning Signs:

Flashing 4WD light, Won’t select 4H or 4L cleanly, Drivetrain stays in the wrong mode

What to Inspect:
  • Engage every mode during the test drive
  • Check for a flashing indicator that never settles
  • Inspect for split vacuum hoses or evidence of previous repair
Verified by IsItAGoodCar Research Team

3.2 DI-D Injector and Fuel-System Trouble

ModerateFuel System

Higher-mileage 3.2 diesels can develop injector-related rough running, smoky starts and difficult starting, especially if rust or contamination has reached the fuel system.

Est. Repair Cost: £300–£1,500
Warning Signs:

Hard starting, Black smoke at idle or startup, Rough running under light load

What to Inspect:
  • Start the engine from cold and watch the exhaust
  • Listen for uneven idle once warm
  • Ask about injector, pump or fuel-system work in the history
Verified by IsItAGoodCar Research Team

Buying Tips for 2018 Mitsubishi Shogun Mk4

  • Inspect the rear subframe specifically, as it is a known structural weak point that can rot through.
  • Cycle the Super Select system through all modes and reject cars with a 4WD light that keeps flashing.
  • Check the fuel filler neck for corrosion, which can lead to debris entering the fuel system.
Check a 2018 Mitsubishi Shogun Mk4 by Registration