Isuzu Unknown (1992)
1992 Isuzu Unknown
CarHunch analysed 278 real MOT records for the 1992 Isuzu Unknown. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 1992 Isuzu has a catastrophic 1.1% first-time pass rate—nearly 79 percentage points below the UK average of 80%—making it one of the worst-performing cohorts on record. The diesel variants (which account for 212 of the 278 vehicles) show a 0% pass rate, suggesting these are either mechanically exhausted or the data reflects vehicles no longer roadworthy enough to attempt MOT.
At an average mileage of 178,836 miles for a 32-year-old vehicle, these cars are heavily used and worn, with dangerous defects appearing in just 0.4% of cases suggesting safety issues are less common than sheer mechanical failure. Any 1992 Isuzu still attempting MOT is a lottery ticket—avoid unless you're buying a parts donor or have specialist knowledge and deep pockets for restoration work.
What to check before buying a 1992 Isuzu 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 Isuzu Unknown
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (76%) | 212 | 0% | 0 |
| Petrol (23%) | 64 | 2.4% | 0.06 |
| Diesel (1%) | 2 | 70.8% | 2 |
MOT History Averages
Most Common MOT Issues — 1992 Isuzu Unknown
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
-
66.7%
slight oil leak on engine
-
66.7%
Offside Front brake has slight drag
-
66.7%
Offside Front seat belt frayed
-
66.7%
hand brake lever comes up high
-
66.7%
slight blow front exhaust
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33.3%
Exhaust has a minor leak of exhaust gases from valve in mid section
-
33.3%
Offside Front Shock absorbers has an excessively worn bush top bush
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33.3%
Nearside Front Shock absorbers insecurely attached top bush worn
Data covers a 3-year window centred on 1992. Counts include advisories and failures.
Found a specific Isuzu Unknown?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.