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 Mini Cooper Petrol 1499cc has had 3 MOT tests on record, passing every one. It has 29,894 miles on the clock, averaging 5,018 miles per year, below the UK average of 7,400. The 1.5 B38 TwinPower Turbo engine is known for b38a15a and timing chain and guides.
MOT & Mileage History for ST21 ONL
Data from DVSA. Last updated August 2026. Check gov.uk for the latest.
MOT failures recorded
Average miles/year
Gaps in MOT history
Mileage Analysis
Below average| Latest reading | 29,894 miles |
| Reading date | |
| Miles last year | 1,542 |
| Average per year | 5,018 |
| Mileage consistency | Consistent |
Check ST21 ONL
- 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 3 tests on record
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Buyers comparing the Mini Cooper often also look at these models. Check their MOT history and reliability before deciding:
Reported issues for this Mini Cooper
These are the most commonly reported problems on Mini Cooper models (2014–2023), based on owner reports and workshop data across the UK.
B38A15A
Timing Chain and Guides
Chain stretches prematurely; guides can break.
Common faults, what to check, and what to pay
Explore more about the Mini Cooper
Thinking about buying this car? These resources will help you make an informed decision.
Vehicle Details
| Registration | ST21 ONL |
| Make | Mini |
| Model | Cooper |
| Colour | Red |
| Fuel type | Petrol |
| Engine | 1499cc |
| Year | 2021 |
| First registered | |
| Area code | ST — Dundee, Scotland |
| Age identifier | 21 — March 2021 to August 2021 |
More ST21 O plates
Browse all ST21 O registrations from Dundee.
About ST21 ONL
What car is ST21 ONL?
ST21 ONL is an red Mini Cooper, petrol (1499cc). First registered in Dundee in 2021.
What is the mileage of ST21 ONL?
The last recorded mileage for ST21 ONL was 29,894 miles, recorded on 24 Dec 2025 during its most recent MOT test.
Has ST21 ONL passed its MOT?
ST21 ONL has had 3 MOT tests with an 100% pass rate (3 passes, 0 failures). It last passed on 24 Dec 2025.
Is ST21 ONL ULEZ compliant?
Based on its fuel type and registration year, ST21 ONL 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 ST21 ONL?
ST21 ONL is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.