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 Hyundai Kona Electric has had 4 MOT tests on record, passing 3 and failing once (75% pass rate). It has 42,860 miles on the clock, averaging 10,912 miles per year, above the UK average of 7,400. Common Hyundai Kona issues include 1. infotainment system glitches and 2. interior rattles and cheap plastics (door panels, dashboard).
MOT & Mileage History for CN21 BJX
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 | 42,860 miles |
| Reading date | |
| Average per year | 10,912 |
| Mileage consistency | Consistent |
Check CN21 BJX
- 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 4 tests on record
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Reported issues for this Hyundai Kona
These are the most commonly reported problems on Hyundai Kona models (2017–2022), based on owner reports and workshop data across the UK.
1. Infotainment system glitches (8" or 10.25" touchscreen post-facelift)
Screen freezes, lags, or reboots randomly; Apple CarPlay/Android Auto disconnects frequently; navigation or radio locks up for seconds. · Typical repair: £50-£150 for dealer software update; £300-£600 for screen replacement if hardware fault (indie garage).
2. Interior rattles and cheap plastics (door panels, dashboard)
Hard plastics in lower/mid trims creak or rattle; clips loosen over time. · Typical repair: £100-£250 to refit clips + felt tape (DIY-friendly); £400+ for full panel refresh.
3. Airbag control unit software fault
ECU misreads crash signals, potentially delaying airbag deployment. · Typical repair: Free under recall; £200-£400 if out-of-warranty software flash.
4. Excessive road/tire noise (sound insulation)
Thin insulation lets in wind/road noise; pre-facelift worst. · Typical repair: £200-£500 for aftermarket sound deadening mats in doors/wheel wells.
Explore more about the Hyundai Kona
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Vehicle Details
| Registration | CN21 BJX |
| Make | Hyundai |
| Model | Kona |
| Colour | Grey |
| Fuel type | Electric |
| Year | 2021 |
| First registered | |
| Area code | CN — Cardiff, Cymru (Wales) |
| Age identifier | 21 — March 2021 to August 2021 |
More CN21 B plates
Browse all CN21 B registrations from Cardiff.
About CN21 BJX
What car is CN21 BJX?
CN21 BJX is a grey Hyundai Kona, electric. First registered in Cardiff in 2021.
What is the mileage of CN21 BJX?
The last recorded mileage for CN21 BJX was 42,860 miles, recorded on 2 Jan 2026 during its most recent MOT test.
Has CN21 BJX passed its MOT?
CN21 BJX has had 4 MOT tests with a 75% pass rate (3 passes, 1 failure). It last passed on 2 Jan 2026.
Is CN21 BJX ULEZ compliant?
Based on its fuel type and registration year, CN21 BJX is likely ULEZ compliant. Electric — exempt. This is an estimate based on typical emission standards — confirm with TfL's ULEZ checker for a definitive answer.
How old is CN21 BJX?
CN21 BJX is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.