1978 General Motors Chevrolet MOT Pass Rate
Pass rate for Chevrolet models manufactured in 1978, based on 136 real MOT test results.
Data from official DVSA MOT testing records
1978 General Motors Chevrolet MOT Analysis
The 1978 General Motors Chevrolet has an MOT pass rate of 69.9% based on 136 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 48,267 miles on the odometer. With a 30.1% failure rate, the 1978 Chevrolet is rated as "Good" for MOT reliability.
The leading cause of MOT failure for the 1978 General Motors Chevrolet is Lamps, reflectors and electrical equipment, responsible for 1.5% of failures. 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 range from £5–50. Seat belts and supplementary restraint systems is the second most common issue at 0.7%. Visibility follows at 0.7%.
Top failures specific to 1978 models only. The overall Chevrolet 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 | Lamps, Reflectors And Electrical Equipment | 1.5% | 2 |
| 2 | Seat Belts And Supplementary Restraint Systems | 0.7% | 1 |
| 3 | Visibility | 0.7% | 1 |
Failures per 10,000 Miles
avg. 48,267 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 |
|---|---|---|---|
| Lamps & Electrical | 0.30 | 1.5% | 2 |
| Seat Belts | 0.15 | 0.7% | 1 |
| Visibility | 0.15 | 0.7% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1978 General Motors Chevrolet has an MOT pass rate of 69.9% based on 136 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 48,267 miles on the odometer. With a 30.1% failure rate, the 1978 Chevrolet is rated as "Good" for MOT reliability.
If you own or are considering buying a 1978 General Motors Chevrolet, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to lamps, reflectors and electrical equipment: 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. With relatively low average mileage of 48,267 miles, many of these vehicles are still in good mechanical condition.
Lamps, reflectors and electrical equipment — 1.5% of failures
Lamps, reflectors and electrical equipment issues account for 1.5% of MOT failures on 1978 General Motors Chevrolet 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.
Seat belts and supplementary restraint systems — 0.7% of failures
Seat belts and supplementary restraint systems issues account for 0.7% of MOT failures on 1978 General Motors Chevrolet models. Seat belt failures include frayed or cut webbing, faulty retractors, buckles that don't latch properly, and missing or damaged anchorages. All fitted seat belts must be functional. Typical repair costs: £50–200 per belt. Pre-MOT check: Pull each seat belt fully out and check for fraying, cuts, or fading. Ensure each belt retracts smoothly and the buckle clicks securely. Check the pre-tensioner warning light on the dashboard.
Visibility — 0.7% of failures
Visibility issues account for 0.7% of MOT failures on 1978 General Motors Chevrolet models. Visibility failures relate to the windscreen, wipers, washers, mirrors, and view-obstructing damage. Cracks in the windscreen swept area, ineffective wipers, or empty washer bottles are common causes. Typical repair costs: £10–300. Pre-MOT check: Check the windscreen for chips and cracks — damage larger than 10mm in the driver's swept area or 40mm elsewhere will fail. Test washers and wipers. Ensure both door mirrors are intact and adjustable.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.