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 2018 Seat Leon Petrol 1395cc has had 7 MOT tests on record, passing 6 and failing once (86% pass rate). It has 60,148 miles on the clock, averaging 4,942 miles per year, well below the UK average of 7,400. The 1.4 TSI engine is known for cxsa and wastegate actuator rod.
MOT & Mileage History for KJ18 ONZ
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 | 60,148 miles |
| Reading date | |
| Miles last year | 4,192 |
| Average per year | 4,942 |
| Mileage consistency | Consistent |
Check KJ18 ONZ
- 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 7 tests on record
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Buyers comparing the Seat Leon often also look at these models. Check their MOT history and reliability before deciding:
Reported issues for this Seat Leon
These are the most commonly reported problems on Seat Leon models (2012–2020), based on owner reports and workshop data across the UK.
CXSA
Wastegate actuator rod (electric actuator on turbocharger)
Explore more about the Seat Leon
Thinking about buying this car? These resources will help you make an informed decision.
Vehicle Details
| Registration | KJ18 ONZ |
| Make | Seat |
| Model | Leon |
| Colour | Blue |
| Fuel type | Petrol |
| Engine | 1395cc |
| Year | 2018 |
| First registered | |
| Area code | KJ — Northampton, Luton and Northampton |
| Age identifier | 18 — March 2018 to August 2018 |
More KJ18 O plates
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About KJ18 ONZ
What car is KJ18 ONZ?
KJ18 ONZ is a blue Seat Leon, petrol (1395cc). First registered in Northampton in 2018.
What is the mileage of KJ18 ONZ?
The last recorded mileage for KJ18 ONZ was 60,148 miles, recorded on 17 Feb 2026 during its most recent MOT test.
Has KJ18 ONZ passed its MOT?
KJ18 ONZ has had 7 MOT tests with an 86% pass rate (6 passes, 1 failure). It last passed on 17 Feb 2026.
Is KJ18 ONZ ULEZ compliant?
Based on its fuel type and registration year, KJ18 ONZ 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 KJ18 ONZ?
KJ18 ONZ is approximately 8 years old. Age identifier 18 means registered between 1 March 2018 and 31 August 2018.