1978 Honda 550 Four MOT Pass Rate
Pass rate for 550 Four models manufactured in 1978, based on 38 real MOT test results.
Data from official DVSA MOT testing records
1978 Honda 550 Four MOT Analysis
The 1978 Honda 550 Four has an MOT pass rate of 78.9% based on 38 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 28,965 miles on the odometer. With a 21.1% failure rate, the 1978 550 Four is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1978 Honda 550 Four is Motorcycle audible warning (Horn), responsible for 2.6% of failures. Motorcycle audible warning (Horn) 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 1978 models only. The overall 550 Four 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 Audible Warning (Horn) | 2.6% | 1 |
Failures per 10,000 Miles
avg. 28,965 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 |
|---|---|---|---|
| Motorcycle audible warning (Horn) | 0.91 | 2.6% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1978 Honda 550 Four has an MOT pass rate of 78.9% based on 38 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 28,965 miles on the odometer. With a 21.1% failure rate, the 1978 550 Four is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1978 Honda 550 Four, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle audible warning (horn): 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 28,965 miles, many of these vehicles are still in good mechanical condition.
Motorcycle audible warning (Horn) — 2.6% of failures
Motorcycle audible warning (Horn) issues account for 2.6% of MOT failures on 1978 Honda 550 Four models. Motorcycle audible warning (Horn) 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.