1984 Caterham Seven (s3) MOT Pass Rate
Pass rate for Seven (s3) models manufactured in 1984, based on 79 real MOT test results.
Data from official DVSA MOT testing records
1984 Caterham Seven (s3) MOT Analysis
The 1984 Caterham Seven (s3) has an MOT pass rate of 79.7% based on 79 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 31,231 miles on the odometer. With a 20.3% failure rate, the 1984 Seven (s3) is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1984 Caterham Seven (s3) is Noise, emissions and leaks, responsible for 3.8% 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+. Suspension is the second most common issue at 3.8%. Lamps, reflectors and electrical equipment follows at 1.3%.
Top failures specific to 1984 models only. The overall Seven (s3) 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 | 3.8% | 3 |
| 2 | Suspension | 3.8% | 3 |
| 3 | Lamps, Reflectors And Electrical Equipment | 1.3% | 1 |
| 4 | Brakes | 1.3% | 1 |
Failures per 10,000 Miles
avg. 31,231 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 | 1.22 | 3.8% | 3 |
| Suspension | 1.22 | 3.8% | 3 |
| Lamps & Electrical | 0.41 | 1.3% | 1 |
| Brakes | 0.41 | 1.3% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1984 Caterham Seven (s3) has an MOT pass rate of 79.7% based on 79 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 31,231 miles on the odometer. With a 20.3% failure rate, the 1984 Seven (s3) is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1984 Caterham Seven (s3), you can expect reliable MOT performance overall. 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 31,231 miles, many of these vehicles are still in good mechanical condition.
Noise, emissions and leaks — 3.8% of failures
Noise, emissions and leaks issues account for 3.8% of MOT failures on 1984 Caterham Seven (s3) 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.
Suspension — 3.8% of failures
Suspension issues account for 3.8% of MOT failures on 1984 Caterham Seven (s3) models. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Lamps, reflectors and electrical equipment — 1.3% of failures
Lamps, reflectors and electrical equipment issues account for 1.3% of MOT failures on 1984 Caterham Seven (s3) 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.