1979 Opel Monza MOT Pass Rate
Pass rate for Monza models manufactured in 1979, based on 46 real MOT test results.
Data from official DVSA MOT testing records
1979 Opel Monza MOT Analysis
The 1979 Opel Monza has an MOT pass rate of 54.3% based on 46 tests — below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 61,068 miles on the odometer. With a 45.7% failure rate, the 1979 Monza is rated as "Poor" for MOT reliability.
The leading cause of MOT failure for the 1979 Opel Monza is Body, chassis, structure, responsible for 69.6% of failures. 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 range from £100–500+. Brakes is the second most common issue at 34.8%. Lamps, reflectors and electrical equipment follows at 17.4%.
Top failures specific to 1979 models only. The overall Monza 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 | Body, Chassis, Structure | 69.6% | 32 |
| 2 | Brakes | 34.8% | 16 |
| 3 | Lamps, Reflectors And Electrical Equipment | 17.4% | 8 |
Failures per 10,000 Miles
avg. 61,068 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 |
|---|---|---|---|
| Body & Structure | 11.39 | 69.6% | 32 |
| Brakes | 5.70 | 34.8% | 16 |
| Lamps & Electrical | 2.85 | 17.4% | 8 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1979 Opel Monza has an MOT pass rate of 54.3% based on 46 tests — below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 61,068 miles on the odometer. With a 45.7% failure rate, the 1979 Monza is rated as "Poor" for MOT reliability.
If you own or are considering buying a 1979 Opel Monza, be prepared for above-average maintenance costs. Before your MOT, pay particular attention to body, chassis, structure: 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. At 61,068 average miles, these vehicles are in the mid-range where component wear starts to become a factor.
Body, chassis, structure — 69.6% of failures
Body, chassis, structure issues account for 69.6% of MOT failures on 1979 Opel Monza 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.
Brakes — 34.8% of failures
Brakes issues account for 34.8% of MOT failures on 1979 Opel Monza 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 — 17.4% of failures
Lamps, reflectors and electrical equipment issues account for 17.4% of MOT failures on 1979 Opel Monza 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.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.