BMW 525 (1984)
1984 BMW 525
CarHunch analysed 112 real MOT records for the 1984 BMW 525. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1984 BMW 525 is a genuine reliability gamble, with just 60.5% passing MOT first time against the UK average of 80%—that's a 20-point deficit that signals these nearly 40-year-old cars need serious scrutiny before purchase. Only 9.8% have ever suffered dangerous defects, which is reassuring, but the median CarHunch score of 50 reflects a vehicle split down the middle between keepers and potential money pits.
At 114,000 miles on average, these cars have covered reasonable distance for their age, but each vehicle typically racks up 1.75 failures and 5.6 advisories per test—meaning wear items and minor systems are constantly needing attention. If you're considering one, have a trusted mechanic do a full pre-purchase inspection focusing on suspension, cooling system, and electrical gremlins, because age and mileage alone don't explain the high failure rate; build quality on this generation can be temperamental.
What to check before buying a 1984 BMW 525
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 BMW 525
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 (98%) | 110 | 60.7% | 1.78 |
| Diesel (2%) | 2 | 50% | 0 |
Mileage Distribution
Most 1984 BMW 525 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 BMW 525 vehicles fall between 91,564 and 142,921 miles.
1984 BMW 525 — Still on the Road
10 vehicles still getting MOTs in 2019 — 59% of the peak remain.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2019.
MOT History Averages
Most Common MOT Issues — 1984 BMW 525
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
-
22.9%
Oil leak
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22.3%
Offside Front Tyre worn close to the legal limit
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20.3%
Fuel pipe/s corroded
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17.4%
Nearside Rear Suspension component mounting prescribed area is excessively corroded
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16.8%
Offside Rear Suspension component mounting prescribed area is excessively corroded
-
16.1%
Nearside Rear Brake pipe slightly corroded
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15.8%
Parking brake: efficiency below requirements
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15.5%
Nearside Rear Tyre worn close to the legal limit
Data covers a 3-year window centred on 1984. Counts include advisories and failures.
Found a specific BMW 525?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.