Jaguar Xj (1986)
1986 Jaguar Xj
CarHunch analysed 423 real MOT records for the 1986 Jaguar Xj. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1986 Jaguar XJ's 68.2% first-time pass rate sits 11.8 percentage points below the UK average of 80%, signalling genuine reliability concerns—and one in five examples have been flagged with dangerous defects, which is a serious buyer consideration. These cars are averaging 1.8 failures per MOT cycle and 6.4 advisories, reflecting the wear and complexity you'd expect from a nearly 40-year-old luxury saloon.
At under 88,000 miles median mileage, these XJs haven't been thrashed, yet they're still struggling to pass MOT, which tells you the problems are age-related rather than abuse-related. If you're serious about one, budget for professional pre-purchase inspection by someone familiar with British Leyland-era Jaguars, and expect regular remedial work to keep it roadworthy.
What to check before buying a 1986 Jaguar Xj
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.
- ⚠️ 20.3% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 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 Jaguar Xj
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%) | 420 | 68.2% | 1.81 |
| Diesel (0%) | 2 | 87.5% | 0.5 |
| LPG (0%) | 1 | 50% | 1 |
Mileage Distribution
Most 1986 Jaguar Xj 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 1986 Jaguar Xj vehicles fall between 62,679 and 107,386 miles.
1986 Jaguar Xj — Still on the Road
Numbers are declining — 37 vehicles still getting MOTs in 2025 (49% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
MOT History Averages
Most Common MOT Issues — 1986 Jaguar Xj
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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46%
Parking brake: efficiency below requirements
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21.4%
Oil leak
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17.7%
Nearside Front wheel bearing has slight play
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16.7%
Offside Front wheel bearing has slight play
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15.4%
Nearside Front Tyre worn close to the legal limit
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15.3%
Offside Front Tyre worn close to the legal limit
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14.5%
Nearside Rear Tyre worn close to the legal limit
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13%
Offside Rear Tyre worn close to the legal limit
Data covers a 3-year window centred on 1986. Counts include advisories and failures.
Found a specific Jaguar Xj?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.