Unstoppable off-road workhorse — avoid the 3.0 diesel
The Isuzu Trooper is a rugged body-on-frame 4x4 that earned a strong reputation as a reliable off-road workhorse from 1987 to 2003. Alongside the Mitsubishi Shogun, it defined the working off-roader segment and remains popular with rural and agricultural users who value toughness and towing ability over on-road manners.
We track 5 known issues across the Isuzu Trooper range, including 1 rated as safety-critical. Knowing which variants and configurations to approach with caution can save you from expensive surprises after purchase.
Found a Isuzu Trooper? Enter the reg to see which of our 5 known issues apply to that exact car, plus full MOT history and mileage checks.
UBS55 (1991–2002) — Petrol options included the 3.2 V6, 3.5 V6, with 3.1 TD, 3.0 DTI on the diesel side. Our database flags 5 known issues on this generation, 1 of which are rated as safety-critical. The most significant concern is Chassis and body structural corrosion (£2,000–£4,000 to address).
The Trooper suffers from severe structural corrosion affecting chassis rails, mounting points, and load-bearing body components. 1 times average rates. The galvanising process was inadequate and water traps around suspension mounting points accelerate decay. This represents the most serious safety defect on the model, with repair costs often exceeding vehicle value.
Structural corrosion compromises crash protection and can lead to suspension mounting point failure. In severe cases, the vehicle becomes unsafe to drive with risk of wheel detachment or loss of steering control. Professional welding repairs typically cost £2,000-£5,000 but may not be possible if corrosion is too extensive.
Inspect the wheel arches, sills, jacking points and door bottoms carefully. Press gently on sills to check for soft spots. Look underneath for corrosion on structural components. Check the MOT history for corrosion-related advisories or failures.
The Trooper exhibits excessive steering wheel free play due to worn steering column top bearing and steering box wear. MOT data shows free play failures at 157.7 times the fleet average and column bearing wear at 48.7 times average rates. The heavy weight of the vehicle and recirculating ball steering system create high loads that cause premature wear. This affects directional stability and requires constant steering corrections.
Excessive steering play reduces vehicle control and increases driver fatigue on long journeys. In extreme cases, the vehicle may become difficult to keep in a straight line at motorway speeds. Steering box rebuild or replacement typically costs £800-£1,500 plus labour.
During the test drive, check the steering for excessive play, vibration or pulling to one side. Listen for groaning or whining when turning the wheel at low speed. Power steering fluid level and condition should be checked on hydraulic systems.
The Trooper suffers from premature wheel bearing failure, particularly on the front axle. MOT data shows bearing play failures at 22.1 times the fleet average across all mileage bands. The vehicle's weight, combined with 4WD system loads and the hub design, places high stress on the bearings. Front bearings are more commonly affected than rear, with failure often accompanied by ABS sensor damage.
A collapsed wheel bearing can cause wheel detachment and loss of vehicle control. Early symptoms include noise and vibration, progressing to dangerous play in the wheel assembly. Replacement of a front wheel bearing assembly typically costs £200-£400 including labour.
Listen for knocking, clunking or rattling over bumps during the test drive. Inspect the underside for corroded or cracked suspension components. Check the MOT history for suspension-related advisories, which often predict future failures.
The Trooper's 4WD transmission system experiences premature wear of CV joints, propshaft universal joints, and transfer case components. The permanent 4WD system with center differential places constant stress on driveline components, while the vehicle's weight and off-road usage accelerate wear patterns.
Failed CV joints cause clicking noises and eventual loss of drive to the affected wheel. Transfer case problems can disable the 4WD system entirely. A CV joint replacement costs £200-£400 per side, while transfer case rebuilds can cost £1,000-£2,000.
Listen for clunking or vibration from underneath when pulling away or changing direction. Check for play in the driveshafts by rocking the car in gear with the handbrake on. Worn CV boots are a telltale sign — look for grease splatter around the inner wheel arch.
The diesel variants of the Trooper fail emissions tests at The EGR (Exhaust Gas Recirculation) valve becomes clogged with carbon deposits, affecting combustion quality and emissions compliance. Injector wear and poor fuel quality can also contribute to emissions failures on these older indirect injection diesel engines.
Emissions failure prevents MOT pass and requires repair before the vehicle can be used legally. EGR valve cleaning or replacement typically costs £200-£500. More severe fuel system problems may require injector reconditioning at £600-£1,200.
Check for any engine warning lights on the dashboard. Ask about the car's MOT emissions history — repeated failures suggest underlying issues. A pre-purchase diagnostic scan is especially worthwhile to check for stored emissions fault codes.
For the full breakdown of all 5 tracked issues with repair costs, see the Isuzu Trooper common problems page.
Based on 18k real DVSA MOT tests, the Isuzu Trooper fails more often than average on several items. The biggest outlier is fixings missing or insecure at 141x the fleet average, followed by free play in the steering, measured at the rim ... (116x).
When viewing a specific car, check its MOT history for recurring advisories in these categories. See the full Isuzu Trooper MOT failure breakdown for data at every mileage point.
Routine servicing (oil and filter change every 6k miles) typically costs £80–£120 at an independent garage.
The bigger-ticket items to budget for include timing belt and tensioner (£400–£600).
See the full Isuzu Trooper service schedule for every interval and cost breakdown.
The Isuzu Trooper has some well-documented weak points, including 1 safety-critical issue that demand careful checking. The right example, properly maintained, can still be a sound purchase — but cutting corners on the pre-purchase inspection is not advisable. 1998-2002 with the 3.1-litre turbodiesel — avoid the later 3.0-litre diesel engine which is significantly less reliable
Before committing, check the car's full MOT history, verify the service record is complete, and if possible arrange a specialist inspection. Enter any registration into our free report to see the complete picture.
Get Car Wise maintains a database of known mechanical issues for every popular car on UK roads, tracking the faults that owners, specialists and DVSA data reveal.
When you run a report on a specific Isuzu Trooper, we cross-reference the exact variant, engine and age against our database of 5 known issues. Combined with full MOT history analysis, mileage verification and DVLA data, you get a complete picture before viewing.
Enter the registration for MOT history, mileage verification, known faults for that exact variant, and a Get Car Wise Score.
This guide was compiled from independent expert reviews, DVSA MOT data, specialist workshops and our own database of 5 known Isuzu Trooper issues. We are not affiliated with any source listed.