1977 Morgan 4/4 MOT Pass Rate
Pass rate for 4/4 models manufactured in 1977, based on 372 real MOT test results.
Data from official DVSA MOT testing records
This page shows all 4/4 cars tested in 1977. Want to see how cars built in 1977 hold up over time?
View 1977 Morgan 4/4 vintage page → (71.1% current pass rate)1977 Morgan 4/4 MOT Analysis
The 1977 Morgan 4/4 has an MOT pass rate of 69.1% based on 372 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 53,132 miles on the odometer. With a 30.9% failure rate, the 1977 4/4 is rated as "Good" for MOT reliability.
The leading cause of MOT failure for the 1977 Morgan 4/4 is Tyres, responsible for 2.2% of failures. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs range from £50–200 per tyre. Body, chassis, structure is the second most common issue at 1.6%. Steering follows at 1.1%.
Top failures specific to 1977 models only. The overall 4/4 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 | Tyres | 2.2% | 8 |
| 2 | Body, Chassis, Structure | 1.6% | 6 |
| 3 | Steering | 1.1% | 4 |
| 4 | Brakes | 0.8% | 3 |
| 5 | Lamps, Reflectors And Electrical Equipment | 0.8% | 3 |
| 6 | Visibility | 0.5% | 2 |
| 7 | Suspension | 0.3% | 1 |
Failures per 10,000 Miles
avg. 53,132 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 |
|---|---|---|---|
| Tyres | 0.40 | 2.2% | 8 |
| Body & Structure | 0.30 | 1.6% | 6 |
| Steering | 0.20 | 1.1% | 4 |
| Brakes | 0.15 | 0.8% | 3 |
| Lamps & Electrical | 0.15 | 0.8% | 3 |
| Visibility | 0.10 | 0.5% | 2 |
| Suspension | 0.05 | 0.3% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1977 Morgan 4/4 has an MOT pass rate of 69.1% based on 372 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 53,132 miles on the odometer. With a 30.9% failure rate, the 1977 4/4 is rated as "Good" for MOT reliability.
If you own or are considering buying a 1977 Morgan 4/4, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to tyres: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating. At 53,132 average miles, these vehicles are in the mid-range where component wear starts to become a factor.
Tyres — 2.2% of failures
Tyres issues account for 2.2% of MOT failures on 1977 Morgan 4/4 models. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Body, chassis, structure — 1.6% of failures
Body, chassis, structure issues account for 1.6% of MOT failures on 1977 Morgan 4/4 models. Body and structure failures include excessive corrosion, sharp edges, loose panels, and damage to the vehicle frame. Rust is the primary concern, especially on older vehicles or those exposed to road salt. Typical repair costs: £100–500+. Pre-MOT check: Inspect sills, wheel arches, door bottoms, and the chassis for rust. Surface rust is acceptable but structural corrosion or holes will fail. Check that all doors, bonnet, and boot close securely.
Steering — 1.1% of failures
Steering issues account for 1.1% of MOT failures on 1977 Morgan 4/4 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.