IsItAGoodCar
Reliability Guide

Common Problems with the
1998 Isuzu Trooper (Mk2)

A comprehensive facelift introduced a restyled front end, a modernized dashboard, Borg-Warner Torque-on-Demand 4WD, and the advanced yet temperamental 3.0-litre 4JX1 direct-injection diesel engine.

What changed for 1998

  • •Introduction of the 3.0-litre DOHC 16-valve 4JX1 direct-injection turbodiesel producing 157bhp
  • •New 3.5-litre 24-valve V6 petrol engine producing 215bhp replacing the older 3.2-litre unit
  • •Borg-Warner Torque-on-Demand (TOD) electronically controlled 4WD system on Citation models
  • •Redesigned front styling with a smoothed grille, revised headlights, and updated cabin switchgear

Common MOT watch-outs

  • !High exhaust smoke emissions and oil leaks from failing 4JX1 injector sleeve seals and oil pressure rail
  • !Structural chassis corrosion around rear cross-members, body mounting points, and fuel tank supports
  • !Failed handbrake efficiency caused by seized internal drum-in-disc handbrake shoes
3
Known Issues
2
Serious
1
Moderate
0
Minor

All Known Issues

3.0L (4JX1) Injector Seal Failure

SeriousEngine

A notorious issue where the injector O-rings fail, allowing diesel to enter the engine oil. This can cause the engine to "run away" on its own oil or fail to start.

Est. Repair Cost: £600–£1,500
Warning Signs:

Rising oil level, Engine oil smelling of diesel, Failure to start when hot

What to Inspect:
  • Check the dipstick for thin, diesel-scented oil
  • Check for evidence of the official Isuzu recall fix
Verified by IsItAGoodCar Research Team

Catastrophic Chassis Rot

SeriousSuspension & Chassis

Troopers are unfortunately famous for chassis rot. Many have been scrapped because the chassis rails simply disintegrated.

Est. Repair Cost: £1,000+
Warning Signs:

Flaking metal on the chassis, Visible holes

What to Inspect:
  • Hammer test the entire length of the chassis rails
Verified by IsItAGoodCar Research Team

Dual Mass Flywheel (DMF) Failure

ModerateGearbox & Transmission

Later manual models use a DMF that can fail, leading to vibration and expensive repairs.

Est. Repair Cost: £800–£1,200
Warning Signs:

Vibration through the clutch pedal, Clunking noise when starting or stopping the engine

What to Inspect:
  • Listen for a rattle at idle that disappears when the clutch is pressed
Verified by IsItAGoodCar Research Team

Buying Tips for 1998 Isuzu Trooper (Mk2)

  • Sniff the engine oil dipstick for diesel odour and verify the oil level is not abnormally high from fuel dilution
  • Check history for Isuzu dealer recall paperwork regarding modified injector sleeve O-rings and wiring harnesses
  • Listen for dual-mass flywheel rattling at idle on manual models that subsides when the clutch pedal is depressed
1993–19971999
Check a 1998 Isuzu Trooper (Mk2) by Registration