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 2017 Seat Leon Petrol 1395cc has had 8 MOT tests on record, passing 7 and failing once (88% pass rate). It has 126,734 miles on the clock, averaging 10,427 miles per year, above the UK average of 7,400. The 1.4 TSI engine is known for cxsa and wastegate actuator rod.
MOT & Mileage History for KN17 CJX
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
Above average| Latest reading | 126,734 miles |
| Reading date | |
| Miles last year | 4,024 |
| Average per year | 10,427 |
| Mileage consistency | Variable |
Check KN17 CJX
- 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 8 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 | KN17 CJX |
| Make | Seat |
| Model | Leon |
| Colour | Red |
| Fuel type | Petrol |
| Engine | 1395cc |
| Year | 2017 |
| First registered | |
| Area code | KN — Luton, Luton and Northampton |
| Age identifier | 17 — March 2017 to August 2017 |
More KN17 C plates
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About KN17 CJX
What car is KN17 CJX?
KN17 CJX is a red Seat Leon, petrol (1395cc). First registered in Luton in 2017.
What is the mileage of KN17 CJX?
The last recorded mileage for KN17 CJX was 126,734 miles, recorded on 20 Apr 2026 during its most recent MOT test.
Has KN17 CJX passed its MOT?
KN17 CJX has had 8 MOT tests with an 88% pass rate (7 passes, 1 failure). It last passed on 20 Apr 2026.
Is KN17 CJX ULEZ compliant?
Based on its fuel type and registration year, KN17 CJX 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 KN17 CJX?
KN17 CJX is approximately 9 years old. Age identifier 17 means registered between 1 March 2017 and 31 August 2017.