2021 BMW Z4 MOT Pass Rate
Pass rate for Z4 models manufactured in 2021, based on 1,589 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Z4 cars tested in 2021. Want to see how cars built in 2021 hold up over time?
View 2021 BMW Z4 vintage page → (93.2% current pass rate)2021 BMW Z4 MOT Analysis
The 2021 BMW Z4 has an MOT pass rate of 93.5% based on 1,589 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 17,979 miles on the odometer. With a 6.5% failure rate, the 2021 Z4 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2021 BMW Z4 is Tyres, responsible for 10.5% of failures. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs range from £50–200 per tyre. Lamps, reflectors and electrical equipment is the second most common issue at 1.7%. Identification of the vehicle follows at 0.8%.
Top failures specific to 2021 models only. The overall Z4 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 | Tyres | 10.5% | 167 |
| 2 | Lamps, Reflectors And Electrical Equipment | 1.7% | 27 |
| 3 | Identification Of The Vehicle | 0.8% | 13 |
| 4 | Non-component Advisories | 0.8% | 12 |
| 5 | Road Wheels | 0.5% | 8 |
| 6 | Visibility | 0.4% | 7 |
| 7 | Suspension | 0.1% | 2 |
| 8 | Brakes | 0.1% | 2 |
Failures per 10,000 Miles
avg. 17,979 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 |
|---|---|---|---|
| Tyres | 5.85 | 10.5% | 167 |
| Lamps & Electrical | 0.95 | 1.7% | 27 |
| Identification of the vehicle | 0.46 | 0.8% | 13 |
| Non-component advisories | 0.42 | 0.8% | 12 |
| Wheels | 0.28 | 0.5% | 8 |
| Visibility | 0.25 | 0.4% | 7 |
| Suspension | 0.07 | 0.1% | 2 |
| Brakes | 0.07 | 0.1% | 2 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2021 BMW Z4 has an MOT pass rate of 93.5% based on 1,589 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 17,979 miles on the odometer. With a 6.5% failure rate, the 2021 Z4 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2021 BMW Z4, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to tyres: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating. With relatively low average mileage of 17,979 miles, many of these vehicles are still in good mechanical condition.
Tyres — 10.5% of failures
Tyres issues account for 10.5% of MOT failures on 2021 BMW Z4 models. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Lamps, reflectors and electrical equipment — 1.7% of failures
Lamps, reflectors and electrical equipment issues account for 1.7% of MOT failures on 2021 BMW Z4 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.
Identification of the vehicle — 0.8% of failures
Identification of the vehicle issues account for 0.8% of MOT failures on 2021 BMW Z4 models. Identification failures relate to the Vehicle Identification Number (VIN) and registration plate. The VIN must be permanently displayed and legible, and the registration plate must meet British Standard formatting. Typical repair costs: £10–50. Pre-MOT check: Ensure the VIN plate is visible and legible (usually in the windscreen or under the bonnet). Check that number plates are clean, undamaged, and use the correct font and spacing.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.