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 Audi A3 S Line 40 Tfsi E S-A Hybrid Electric (Clean) 1395cc has had 3 MOT tests on record, passing every one. It has 51,719 miles on the clock, averaging 8,357 miles per year, around the UK average of 7,400.
MOT & Mileage History for KN21 BXB
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
About average| Latest reading | 51,719 miles |
| Reading date | |
| Miles last year | 8,466 |
| Average per year | 8,357 |
| Mileage consistency | Consistent |
Check KN21 BXB
- Write-off & insurance claims Experian
- Outstanding finance check Experian
- Stolen vehicle check Experian
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- 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
Common faults, what to check, and what to pay
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Vehicle Details
| Registration | KN21 BXB |
| Make | Audi |
| Model | A3 S Line 40 Tfsi E S-A |
| Colour | Black |
| Fuel type | Hybrid Electric (Clean) |
| Engine | 1395cc |
| Year | 2021 |
| First registered | |
| Area code | KN — Luton, Luton and Northampton |
| Age identifier | 21 — March 2021 to August 2021 |
More KN21 B plates
Browse all KN21 B registrations from Luton.
About KN21 BXB
What car is KN21 BXB?
KN21 BXB is a black Audi A3 S Line 40 Tfsi E S-A, hybrid electric (clean) (1395cc). First registered in Luton in 2021.
What is the mileage of KN21 BXB?
The last recorded mileage for KN21 BXB was 51,719 miles, recorded on 20 Jul 2026 during its most recent MOT test.
Has KN21 BXB passed its MOT?
KN21 BXB has had 3 MOT tests with an 100% pass rate (3 passes, 0 failures). It last passed on 20 Jul 2026.
Is KN21 BXB ULEZ compliant?
Based on its fuel type and registration year, KN21 BXB 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 KN21 BXB?
KN21 BXB is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.