Subaru Unknown (1998)
1998 Subaru Unknown
CarHunch analysed 178 real MOT records for the 1998 Subaru Unknown. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
These 1998 Subarus are profoundly unreliable by modern standards, with only 8.9% passing first-time against the UK average of 80%—a catastrophic 71-point shortfall that reflects their age and likely neglect. Dangerous defects are rare (0.6% of vehicles), but the nearly total failure rate to pass inspection is the real concern here.
At 120,000 miles median, these cars have done normal mileage for their 26 years, yet they're accumulating failures rather than advisories (0.05 failures and 0.2 advisories per vehicle on average), suggesting structural and mechanical decay rather than wear items. If you're considering a 1998 Subaru, expect to budget heavily for repairs immediately after purchase—these vehicles need a thorough pre-buy inspection by a specialist, not just an MOT pass.
What to check before buying a 1998 Subaru 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 Subaru 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 (97%) | 173 | 8% | 0.02 |
| Other (2%) | 3 | 71.4% | 2 |
| Gas (1%) | 1 | 0% | 0 |
| Gas Bi-Fuel (1%) | 1 | 0% | 0 |
Mileage Distribution
Most 1998 Subaru 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.
Half of all 1998 Subaru Unknown vehicles fall between 64,247 and 140,471 miles.
MOT History Averages
Most Common MOT Issues — 1998 Subaru Unknown
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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27.3%
Rear Sub-frame corroded but not seriously weakened
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22.7%
Offside Front Tyre worn close to legal limit/worn on edge
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22.7%
Nearside Front Tyre worn close to legal limit/worn on edge
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18.2%
Exhaust has a minor leak of exhaust gases
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18.2%
Offside Front Seat belt webbing slightly damaged or frayed
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18.2%
Nearside Rear Shock absorber has a light misting of oil
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13.6%
Oil leak, but not excessive
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13.6%
Offside Rear Shock absorber has a light misting of oil
Data covers a 3-year window centred on 1998. Counts include advisories and failures.
Found a specific Subaru Unknown?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.