1978 Reliant Unclassified MOT Pass Rate
Pass rate for Unclassified models manufactured in 1978, based on 46 real MOT test results.
Data from official DVSA MOT testing records
1978 Reliant Unclassified MOT Analysis
The 1978 Reliant Unclassified has an MOT pass rate of 69.6% based on 46 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 40,079 miles on the odometer. With a 30.4% failure rate, the 1978 Unclassified is rated as "Good" for MOT reliability.
The leading cause of MOT failure for the 1978 Reliant Unclassified is Brakes, responsible for 19.6% of failures. 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 range from £150–400. Lamps, Reflectors and Electrical Equipment is the second most common issue at 15.2%. Motor tricycles and quadricycles follows at 4.3%.
Top failures specific to 1978 models only. The overall Unclassified 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 | Brakes | 19.6% | 9 |
| 2 | Lamps, Reflectors And Electrical Equipment | 15.2% | 7 |
| 3 | Motor Tricycles And Quadricycles | 4.3% | 2 |
| 4 | Body, Structure And General Items | 2.2% | 1 |
Failures per 10,000 Miles
avg. 40,079 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.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Brakes | 4.88 | 19.6% | 9 |
| Lamps & Electrical | 3.80 | 15.2% | 7 |
| Motor tricycles and quadricycles | 1.08 | 4.3% | 2 |
| Body & Structure | 0.54 | 2.2% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1978 Reliant Unclassified has an MOT pass rate of 69.6% based on 46 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 40,079 miles on the odometer. With a 30.4% failure rate, the 1978 Unclassified is rated as "Good" for MOT reliability.
If you own or are considering buying a 1978 Reliant Unclassified, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to brakes: 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). With relatively low average mileage of 40,079 miles, many of these vehicles are still in good mechanical condition.
Brakes — 19.6% of failures
Brakes issues account for 19.6% of MOT failures on 1978 Reliant Unclassified 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).
Lamps, Reflectors and Electrical Equipment — 15.2% of failures
Lamps, Reflectors and Electrical Equipment issues account for 15.2% of MOT failures on 1978 Reliant Unclassified models. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Motor tricycles and quadricycles — 4.3% of failures
Motor tricycles and quadricycles issues account for 4.3% of MOT failures on 1978 Reliant Unclassified models. Motor tricycles and quadricycles issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.