Used car guide

1998 Land Rover Defender diesel: common problems and MOT failures

What MOT testers find on the diesel Land Rover Defender first registered in 1998 (diesel cars only): we looked at the 9,581 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

9,581MOTs of 1998 diesel cars, done in 2023–2025
65%pass first time (all 1998 cars: 65%)
5,200typical miles a year
1.7×the usual rate for engine oil leaks

What goes wrong more than usual on a 1998 Land Rover Defender diesel?

Parts flagged at MOT more often on the 1998 Land Rover Defender diesel than on all cars registered in 1998.

  • Engine oil leaks1.7× usual
    Land Rover Defender
    26.9% All 1998 cars
    15.7%

    Failed outright at MOT: 0.6%, against 0.4% of all 1998 cars. The rest were advisories or minor defects.

    Rough price £80–£600 our estimate

    At the viewing: Look under the engine and where the car is usually parked for fresh oil. Ask whether the leak has been looked at.

  • Seat belts6.2× usual
    Land Rover Defender
    12.4% All 1998 cars
    2%

    Failed outright at MOT: 1.6%, against 0.6% of all 1998 cars. The rest were advisories or minor defects.

    Rough price £80–£250 our estimate

    At the viewing: Pull each seatbelt sharply. It should lock and retract smoothly.

  • Wheel bearings2.6× usual
    Land Rover Defender
    16% All 1998 cars
    6.2%

    Failed outright at MOT: 3.1%, against 1% of all 1998 cars. The rest were advisories or minor defects.

    Rough price £120–£300 (one bearing) ClickMechanic

    At the viewing: Listen for a hum or growl that changes as you steer at speed.

  • Shock absorbers1.8× usual
    Land Rover Defender
    11.7% All 1998 cars
    6.4%

    Failed outright at MOT: 3.9%, against 1.5% of all 1998 cars. The rest were advisories or minor defects.

    Rough price £200–£300 (pair, average rear to front) ClickMechanic

    At the viewing: Push down hard on each corner. It should bounce once and settle. Look for oil on the shock absorber body.

  • Track rod ends2.2× usual
    Land Rover Defender
    9% All 1998 cars
    4.1%

    Failed outright at MOT: 3.9%, against 1.4% of all 1998 cars. The rest were advisories or minor defects.

    Rough price £50–£150 (one end, plus about £30–£50 if it needs a wheel alignment) ClickMechanic

    At the viewing: On a straight road the steering wheel should sit straight. Listen for knocks when turning, and check the steering feels even.

Better than most

Tread depth: 3.7% here, against 11.1% of all 1998 cars. Flexible brake hoses: 1% here, against 5.6% of all 1998 cars.

Common 1998 Land Rover Defender diesel MOT failures and advisories

The share of 1998 Land Rover Defender diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Lights and electrics
    39% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Suspension
    37% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Oil and fluid leaks
    30% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

  • Brakes
    27% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Rust and bodywork
    14% of testsRough price £150–£1,000

    At the viewing: Check the sills, wheel arches and underneath for rust, and look along the panels for uneven gaps or paint.

  • Steering
    13% of testsRough price £100–£450

    At the viewing: On a straight road the steering wheel should sit straight. Feel for play or knocking when turning.

Questions to ask the seller before buying a 1998 Land Rover Defender diesel

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

  1. Any recent work on the engine oil leaks? (Flagged at MOT 1.7× as often on the 1998 Land Rover Defender diesel as on other cars the same age.)
  2. Any recent work on the seat belts? (Flagged at MOT 6.2× as often on the 1998 Land Rover Defender diesel as on other cars the same age.)
  3. Any recent work on the wheel bearings? (Flagged at MOT 2.6× as often on the 1998 Land Rover Defender diesel as on other cars the same age.)
  4. Can I see the service history and receipts for any big jobs?

Looking at a Land Rover Defender?

Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.

Other years

Every year of the Land Rover Defender compared

YearMOT testsMost flagged
2026–Too new for MOT data
2025–Too new for MOT data
2024–Too new for MOT data
2023529Tyres 6%
202210,198Tyres 16%
202116,997Tyres 16%
202012,258Tyres 17%
2019–Too few tests
20165,259Lights and electrics 15%
201519,425Brakes 20%
201417,079Lights and electrics 23%
201312,768Lights and electrics 25%
201211,292Brakes 28%
201111,607Suspension 30%
201011,558Suspension 33%
200910,166Suspension 33%
200810,865Suspension 35%
200711,617Suspension 37%
200611,038Suspension 37%
200512,200Suspension 38%
200412,447Suspension 38%
200312,858Suspension 40%
200211,282Suspension 39%
20019,161Suspension 37%
20008,745Suspension 39%
19998,812Suspension 38%
19979,899Lights and electrics 38%
199610,182Lights and electrics 39%
19958,462Lights and electrics 40%
19946,802Lights and electrics 40%
19935,523Lights and electrics 37%
19924,355Lights and electrics 37%
19914,994Lights and electrics 39%
19904,751Lights and electrics 37%

Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Land Rover Defender cars first registered in 1998. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score