Porsche 911 (1984)
1984 Porsche 911
CarHunch analysed 534 real MOT records for the 1984 Porsche 911. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
What to check before buying a 1984 Porsche 911
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 Porsche 911
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 (100%) | 532 | 72.4% | 2.69 |
| Other (0%) | 2 | 100% | 0 |
Mileage Distribution
Most 1984 Porsche 911 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 Porsche 911 vehicles fall between 74,663 and 125,623 miles.
1984 Porsche 911 — Still on the Road
Numbers are declining — 115 vehicles still getting MOTs in 2025 (45% 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 Porsche 911
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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36.3%
Offside Rear fog lamp not working
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34.1%
Windscreen washer provides insufficient washer liquid
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28.2%
Nearside Rear Tyre worn close to the legal limit
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25.7%
Oil leak
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23.7%
Offside Rear Tyre worn close to the legal limit
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22.6%
Nearside Front wheel bearing has slight play
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22.6%
Oil leak, but not excessive
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21.4%
Rear fog lamp not working
Data covers a 3-year window centred on 1984. Counts include advisories and failures.
Found a specific Porsche 911?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.