Jaguar Xjs (1984)
1984 Jaguar Xjs
CarHunch analysed 407 real MOT records for the 1984 Jaguar Xjs. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1984 Jaguar XJS fails MOT at a significantly higher rate than the UK average, with only 57.6% passing first time compared to the national 80%—a real concern for reliability-conscious buyers. Dangerous defects affect 16.2% of these cars, putting mechanical safety as a material buying risk.
These XJS examples average just 78,600 miles, which is low for a 40-year-old car, yet they still rack up 1.71 failures and 7.4 advisories per test cycle, pointing to age-related wear and specialist maintenance needs rather than hard miles. Before buying, have a pre-purchase inspection focus on fluid leaks, electrical gremlins, and brake systems—the pattern of advisories suggests these cars need attentive ownership.
What to check before buying a 1984 Jaguar Xjs
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 Jaguar Xjs
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 1984 Jaguar Xjs 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 1984 Jaguar Xjs vehicles fall between 56,374 and 100,803 miles.
1984 Jaguar Xjs — Still on the Road
Numbers are declining — 25 vehicles still getting MOTs in 2025 (26% 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 — 1984 Jaguar Xjs
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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53.9%
Parking brake: efficiency below requirements
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43.5%
Oil leak
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25.8%
Oil leak, but not excessive
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18.6%
Offside Front wheel bearing has slight play
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18.6%
Nearside Front wheel bearing has slight play
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18.5%
Exhaust has a minor leak of exhaust gases
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18%
Exhaust emissions carbon monoxide content excessive
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17%
Horn not working
Data covers a 3-year window centred on 1984. Counts include advisories and failures.
Found a specific Jaguar Xjs?
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