1984 Triumph Thunderbird MOT Pass Rate
Pass rate for Thunderbird models manufactured in 1984, based on 30 real MOT test results.
Data from official DVSA MOT testing records
1984 Triumph Thunderbird MOT Analysis
The 1984 Triumph Thunderbird has an MOT pass rate of 93.3% based on 30 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 14,517 miles on the odometer. With a 6.7% failure rate, the 1984 Thunderbird is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1984 Triumph Thunderbird is Motorcycle lighting and signalling, responsible for 3.3% of failures. Motorcycle lighting and signalling 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 range from £100–400.
Top failures specific to 1984 models only. The overall Thunderbird 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 | Motorcycle Lighting And Signalling | 3.3% | 1 |
Failures per 10,000 Miles
avg. 14,517 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 |
|---|---|---|---|
| Motorcycle lighting and signalling | 2.30 | 3.3% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1984 Triumph Thunderbird has an MOT pass rate of 93.3% based on 30 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 14,517 miles on the odometer. With a 6.7% failure rate, the 1984 Thunderbird is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1984 Triumph Thunderbird, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle lighting and signalling: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights. With relatively low average mileage of 14,517 miles, many of these vehicles are still in good mechanical condition.
Motorcycle lighting and signalling — 3.3% of failures
Motorcycle lighting and signalling issues account for 3.3% of MOT failures on 1984 Triumph Thunderbird models. Motorcycle lighting and signalling 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.