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 Bmw 3 Series Petrol 1998cc has had 2 MOT tests on record, passing every one. It has 39,675 miles on the clock, averaging 9,479 miles per year, above the UK average of 7,400. The 320i engine is known for 1. coolant system failures (multiple components) and 2. valve cover gasket leaks.
MOT & Mileage History for KN71 OVS
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
Above average| Latest reading | 39,675 miles |
| Reading date | |
| Miles last year | 9,469 |
| Average per year | 9,479 |
| Mileage consistency | Consistent |
Check KN71 OVS
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Full MOT Test History 2 tests on record
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Reported issues for this Bmw 3 Series
These are the most commonly reported problems on Bmw 3 Series models (2019–2024), based on owner reports and workshop data across the UK.
1. Coolant System Failures (Multiple Components)
The B48 uses a **mechanical water pump with a plastic impeller prone to cracking**, leading to reduced coolant circulation. The **thermostat housing is also plastic and prone to cracking from heat stress**. Hoses become brittle, radiators leak, and the turbo coolant return line develops leaks. These failures cascade—if the engine can't cool itself, oil and turbo temperatures rise, accelerating other failures.[1][2]
2. Valve Cover Gasket Leaks
The valve cover gasket deteriorates and begins to weep oil, typically as a result of heat cycling and age rather than a design flaw.[1][2]
Common faults, what to check, and what to pay
Explore more about the Bmw 3 Series
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Vehicle Details
| Registration | KN71 OVS |
| Make | Bmw |
| Model | 3 Series |
| Colour | Blue |
| Fuel type | Petrol |
| Engine | 1998cc |
| Year | 2021 |
| First registered | |
| Area code | KN — Luton, Luton and Northampton |
| Age identifier | 71 — September 2021 to February 2022 |
More KN71 O plates
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About KN71 OVS
What car is KN71 OVS?
KN71 OVS is a blue Bmw 3 Series, petrol (1998cc). First registered in Luton in 2021.
What is the mileage of KN71 OVS?
The last recorded mileage for KN71 OVS was 39,675 miles, recorded on 2 Apr 2026 during its most recent MOT test.
Has KN71 OVS passed its MOT?
KN71 OVS has had 2 MOT tests with an 100% pass rate (2 passes, 0 failures). It last passed on 2 Apr 2026.
Is KN71 OVS ULEZ compliant?
Based on its fuel type and registration year, KN71 OVS 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 KN71 OVS?
KN71 OVS is approximately 5 years old. Age identifier 71 means registered between 1 September 2021 and 28 February 2022.