IsItAGoodCar
Reliability Guide

Common Problems with the
2003 Mitsubishi Shogun Mk3

A facelift in 2003 brought minor styling updates and improved interior trim, alongside tweaks to the traction control system to improve off-road capability.

What changed for 2003

  • •Minor exterior facelift with revised bumpers and grille.
  • •Upgrades to the M-ASTC (Mitsubishi Active Stability and Traction Control) system.

Common MOT watch-outs

  • !Corrosion on the rear subframe and suspension mounting points.
  • !EGR valve blockages leading to excessive black smoke under acceleration.
3
Known Issues
3
Serious
0
Moderate
0
Minor

All Known Issues

Fuel Tank Delamination

SeriousFuel System

The internal lining of the steel fuel tank can flake off, clogging the fuel filter, lines, and eventually damaging the high-pressure fuel pump and injectors.

Est. Repair Cost: £800–£2,500
Warning Signs:

Stuttering/misfiring under load, Difficulty starting, Engine cutting out

What to Inspect:
  • Check the fuel filter for metallic flakes or black "soot"
Verified by IsItAGoodCar Research Team

Rear Subframe & Arch Rust

SeriousBodywork & Rust

Severe structural corrosion often develops around the rear subframe, rear suspension arms, and inner wheel arches.

Est. Repair Cost: £500–£2,000
Warning Signs:

MOT failure for structural integrity, Visible holes in the rear chassis/subframe area

What to Inspect:
  • Thoroughly inspect the area behind the rear wheels and the subframe mounting points
Verified by IsItAGoodCar Research Team

Brake Accumulator (ABS Pump) Failure

SeriousBrakes

The electric pump and nitrogen-filled accumulator tank can fail, leading to a loss of power assistance for the brakes.

Est. Repair Cost: £600–£1,200
Warning Signs:

Brake warning lights and alarms, Hard brake pedal, Frequent buzzing from the engine bay

What to Inspect:
  • Listen for how often the ABS pump runs; it should only run briefly every few pedal presses
Verified by IsItAGoodCar Research Team

Buying Tips for 2003 Mitsubishi Shogun Mk3

  • Listen for a 'whining' noise from the rear differential, indicating worn bearings.
  • Ensure the automatic gearbox shifts smoothly; early 5-speed autos can be prone to harsh shifts if the fluid is old.
2001–20022004–2005
Check a 2003 Mitsubishi Shogun Mk3 by Registration