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 Seat Mii Ev Electric has had 4 MOT tests on record, passing 3 and failing once (75% pass rate). It has 42,780 miles on the clock, averaging 6,828 miles per year, below the UK average of 7,400.
MOT & Mileage History for BT21 ONB
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
Below average| Latest reading | 42,780 miles |
| Reading date | |
| Average per year | 6,828 |
| Mileage consistency | Consistent |
Check BT21 ONB
- 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
Explore more about the Seat Mii Ev
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Vehicle Details
| Registration | BT21 ONB |
| Make | Seat |
| Model | Mii Ev |
| Colour | Black |
| Fuel type | Electric |
| Year | 2021 |
| First registered | |
| Area code | BT — Birmingham, Birmingham |
| Age identifier | 21 — March 2021 to August 2021 |
More BT21 O plates
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About BT21 ONB
What car is BT21 ONB?
BT21 ONB is a black Seat Mii Ev, electric. First registered in Birmingham in 2021.
What is the mileage of BT21 ONB?
The last recorded mileage for BT21 ONB was 42,780 miles, recorded on 26 Feb 2026 during its most recent MOT test.
Has BT21 ONB passed its MOT?
BT21 ONB has had 4 MOT tests with a 75% pass rate (3 passes, 1 failure). It last passed on 26 Feb 2026.
Is BT21 ONB ULEZ compliant?
Based on its fuel type and registration year, BT21 ONB is likely ULEZ compliant. Electric — exempt. This is an estimate based on typical emission standards — confirm with TfL's ULEZ checker for a definitive answer.
How old is BT21 ONB?
BT21 ONB is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.