1978 Morris Minor MOT Pass Rate
Pass rate for Minor models manufactured in 1978, based on 34 real MOT test results.
Data from official DVSA MOT testing records
1978 Morris Minor MOT Analysis
The 1978 Morris Minor has an MOT pass rate of 55.9% based on 34 tests — slightly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 31,644 miles on the odometer. With a 44.1% failure rate, the 1978 Minor is rated as "Below Average" for MOT reliability.
The leading cause of MOT failure for the 1978 Morris Minor is Noise, emissions and leaks, responsible for 11.8% of failures. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs range from £100–1,000+. Brakes is the second most common issue at 8.8%. Steering follows at 2.9%.
Top failures specific to 1978 models only. The overall Minor page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Noise, Emissions And Leaks | 11.8% | 4 |
| 2 | Brakes | 8.8% | 3 |
| 3 | Steering | 2.9% | 1 |
| 4 | Suspension | 2.9% | 1 |
Failures per 10,000 Miles
avg. 31,644 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Noise, emissions and leaks | 3.72 | 11.8% | 4 |
| Brakes | 2.79 | 8.8% | 3 |
| Steering | 0.93 | 2.9% | 1 |
| Suspension | 0.93 | 2.9% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1978 Morris Minor has an MOT pass rate of 55.9% based on 34 tests — slightly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 31,644 miles on the odometer. With a 44.1% failure rate, the 1978 Minor is rated as "Below Average" for MOT reliability.
If you own or are considering buying a 1978 Morris Minor, budget for potential repairs before each MOT. Before your MOT, pay particular attention to noise, emissions and leaks: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help. With relatively low average mileage of 31,644 miles, many of these vehicles are still in good mechanical condition.
Noise, emissions and leaks — 11.8% of failures
Noise, emissions and leaks issues account for 11.8% of MOT failures on 1978 Morris Minor models. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Brakes — 8.8% of failures
Brakes issues account for 8.8% of MOT failures on 1978 Morris Minor models. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Steering — 2.9% of failures
Steering issues account for 2.9% of MOT failures on 1978 Morris Minor models. Steering failures include excessive play in the steering wheel, leaking power steering fluid, worn track rod ends, and damaged steering rack. These affect vehicle control and are closely related to suspension wear. Typical repair costs: £150–600. Pre-MOT check: Check for excessive steering wheel play (more than a few inches of free movement). Listen for whining from the power steering pump. Look for fluid leaks under the car near the front wheels.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.