Vehicle summary
ULEZ status is estimated based on fuel type and registration year. It may not reflect the actual emission standard of this vehicle. Check with TfL for a definitive answer.
At a glance
This 2021 Mazda 3 Petrol 1998cc has had 4 MOT tests on record, passing 3 and failing once (75% pass rate). It has 28,733 miles on the clock, averaging 8,152 miles per year, around the UK average of 7,400.
MOT & Mileage History for BU21 KSZ
Data from DVSA. Last updated August 2026. Check gov.uk for the latest.
MOT failure recorded
Average miles/year
Gaps in MOT history
Mileage Analysis
About average| Latest reading | 28,733 miles |
| Reading date | |
| Miles last year | 8,645 |
| Average per year | 8,152 |
| Mileage consistency | Consistent |
Check BU21 KSZ
- Write-off & insurance claims Experian
- Outstanding finance check Experian
- Stolen vehicle check Experian
- Ownership changes Experian
- Mileage discrepancy alerts
- Plate & colour change history
- Franchised dealer records
- Independent garage visits
- Service interval analysis
- Warranty work logged
Full MOT Test History 4 tests on record
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Vehicle Details
| Registration | BU21 KSZ |
| Make | Mazda |
| Model | 3 |
| Colour | Black |
| Fuel type | Petrol |
| Engine | 1998cc |
| Year | 2021 |
| First registered | |
| Area code | BU — Birmingham, Birmingham |
| Age identifier | 21 — March 2021 to August 2021 |
More BU21 K plates
Browse all BU21 K registrations from Birmingham.
About BU21 KSZ
What car is BU21 KSZ?
BU21 KSZ is a black Mazda 3, petrol (1998cc). First registered in Birmingham in 2021.
What is the mileage of BU21 KSZ?
The last recorded mileage for BU21 KSZ was 28,733 miles, recorded on 20 Mar 2026 during its most recent MOT test.
Has BU21 KSZ passed its MOT?
BU21 KSZ has had 4 MOT tests with a 75% pass rate (3 passes, 1 failure). It last passed on 20 Mar 2026.
Is BU21 KSZ ULEZ compliant?
Based on its fuel type and registration year, BU21 KSZ is likely ULEZ compliant. Petrol post-2005 (Euro 4). This is an estimate based on typical emission standards — confirm with TfL's ULEZ checker for a definitive answer.
How old is BU21 KSZ?
BU21 KSZ is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.