2004 Derbi Unclassified MOT Pass Rate
Pass rate for Unclassified models manufactured in 2004, based on 140 real MOT test results.
Data from official DVSA MOT testing records
2004 Derbi Unclassified MOT Analysis
The 2004 Derbi Unclassified has an MOT pass rate of 40.7% based on 140 tests — significantly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 15,444 miles on the odometer. With a 59.3% failure rate, the 2004 Unclassified is rated as "Very Poor" for MOT reliability.
The leading cause of MOT failure for the 2004 Derbi Unclassified is Motorcycle brakes, responsible for 2.1% of failures. 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 range from £150–400. Motorcycle suspension is the second most common issue at 0.7%.
Top failures specific to 2004 models only. The overall Unclassified 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 Brakes | 2.1% | 3 |
| 2 | Motorcycle Suspension | 0.7% | 1 |
Failures per 10,000 Miles
avg. 15,444 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 brakes | 1.39 | 2.1% | 3 |
| Motorcycle suspension | 0.46 | 0.7% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2004 Derbi Unclassified has an MOT pass rate of 40.7% based on 140 tests — significantly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 15,444 miles on the odometer. With a 59.3% failure rate, the 2004 Unclassified is rated as "Very Poor" for MOT reliability.
If you own or are considering buying a 2004 Derbi Unclassified, be prepared for above-average maintenance costs. Before your MOT, pay particular attention to motorcycle brakes: 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). With relatively low average mileage of 15,444 miles, many of these vehicles are still in good mechanical condition.
Motorcycle brakes — 2.1% of failures
Motorcycle brakes issues account for 2.1% of MOT failures on 2004 Derbi Unclassified 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).
Motorcycle suspension — 0.7% of failures
Motorcycle suspension issues account for 0.7% of MOT failures on 2004 Derbi Unclassified 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.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.