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Jeep Unknown (1991)

162 real MOT outcomes analysed • 0.5% first-time pass rate

1991 Jeep Unknown

CarHunch analysed 162 real MOT records for the 1991 Jeep Unknown. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

Below average reliability 79.5% below UK average
0.5%
pass MOT first time
UK average: ~80%
181,945
typical mileage
181,945–181,945 middle half
0.6%
ever had a dangerous defect
recorded at any MOT
0.01
avg MOT failures per car
over 1.1 tests on record

What to check before buying a 1991 Jeep Unknown

Practical pre-purchase checks for this age and model.

  • 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
  • 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
  • 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
  • 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.

Before you buy a Jeep Unknown

MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.

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Pass Rate by Fuel Type

Fuel type Vehicles Pass rate Avg failures
Petrol (99%) 160 0.5% 0.01
Diesel (1%) 2 0% 0

Mileage Distribution

Most 1991 Jeep Unknown vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.

181,945
low mileage
181,945
typical
181,945
high mileage

Half of all 1991 Jeep Unknown vehicles fall between 181,945 and 181,945 miles.

MOT History Averages

1.1
Avg MOT tests per vehicle
0.01
Avg failures per vehicle
0.1
Avg advisories per vehicle

Most Common MOT Issues — 1991 Jeep Unknown

Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.

  • 100%
    Front Anti-roll bar linkage pin or bush worn but not resulting in excessive movement both sides upper mountings
  • 66.7%
    Front Tyre worn close to legal limit/worn on edge both sides
  • 66.7%
    Oil leak, but not excessive
  • 66.7%
    Offside Front Tyre worn close to the legal limit
  • 66.7%
    Nearside Front Tyre worn close to the legal limit
  • 66.7%
    Front Brake pad(s) wearing thin
  • 33.3%
    Service brake efficiency less than 50% of the required value
  • 33.3%
    Windscreen washer not working

Data covers a 3-year window centred on 1991. Counts include advisories and failures.

Found a specific Jeep Unknown?

Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.

UK

Other model years — Jeep Unknown:

1980 1981 1982 1988 1989 1990 1992 1993 1994