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 4 MOT tests on record, passing 3 and failing once (75% pass rate). It has 35,393 miles on the clock, averaging 4,133 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 HL21 OVZ
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
Low mileage| Latest reading | 35,393 miles |
| Reading date | |
| Miles last year | 4,099 |
| Average per year | 4,133 |
| Mileage consistency | Consistent |
Check HL21 OVZ
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- Plate & colour change history
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- Service interval analysis
- Warranty work logged
Full MOT Test History 4 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 | HL21 OVZ |
| Make | Bmw |
| Model | 3 Series |
| Colour | Blue |
| Fuel type | Petrol |
| Engine | 1998cc |
| Year | 2021 |
| First registered | |
| Area code | HL — Portsmouth, Hampshire and Dorset |
| Age identifier | 21 — March 2021 to August 2021 |
More HL21 O plates
Browse all HL21 O registrations from Portsmouth.
About HL21 OVZ
What car is HL21 OVZ?
HL21 OVZ is an blue Bmw 3 Series, petrol (1998cc). First registered in Portsmouth in 2021.
What is the mileage of HL21 OVZ?
The last recorded mileage for HL21 OVZ was 35,393 miles, recorded on 27 Jul 2026 during its most recent MOT test.
Has HL21 OVZ passed its MOT?
HL21 OVZ has had 4 MOT tests with a 75% pass rate (3 passes, 1 failure). It last passed on 27 Jul 2026.
Is HL21 OVZ ULEZ compliant?
Based on its fuel type and registration year, HL21 OVZ 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 HL21 OVZ?
HL21 OVZ is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.