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 3 MOT tests on record, passing every one. It has 25,313 miles on the clock, averaging 3,355 miles per year, well below 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 KJ21 YYP
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
Low mileage| Latest reading | 25,313 miles |
| Reading date | |
| Miles last year | 4,468 |
| Average per year | 3,355 |
| Mileage consistency | Variable |
Check KJ21 YYP
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- Plate & colour change history
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- Service interval analysis
- Warranty work logged
Full MOT Test History 3 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
Thinking about buying this car? These resources will help you make an informed decision.
Vehicle Details
| Registration | KJ21 YYP |
| Make | Bmw |
| Model | 3 Series |
| Colour | Grey |
| Fuel type | Petrol |
| Engine | 1998cc |
| Year | 2021 |
| First registered | |
| Area code | KJ — Northampton, Luton and Northampton |
| Age identifier | 21 — March 2021 to August 2021 |
More KJ21 Y plates
Browse all KJ21 Y registrations from Northampton.
About KJ21 YYP
What car is KJ21 YYP?
KJ21 YYP is a grey Bmw 3 Series, petrol (1998cc). First registered in Northampton in 2021.
What is the mileage of KJ21 YYP?
The last recorded mileage for KJ21 YYP was 25,313 miles, recorded on 8 Jan 2026 during its most recent MOT test.
Has KJ21 YYP passed its MOT?
KJ21 YYP has had 3 MOT tests with an 100% pass rate (3 passes, 0 failures). It last passed on 8 Jan 2026.
Is KJ21 YYP ULEZ compliant?
Based on its fuel type and registration year, KJ21 YYP 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 KJ21 YYP?
KJ21 YYP is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.