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 Audi A3 Petrol 999cc has had 8 MOT tests on record, passing 6 and failing 2 (75% pass rate). It has 61,049 miles on the clock, averaging 6,000 miles per year, below the UK average of 7,400. The 1.0 TFSI engine is known for 1. carbon buildup on intake valves and 2. turbocharger actuator/wastegate linkage failure.
MOT & Mileage History for CN18 VZK
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
Below average| Latest reading | 61,049 miles |
| Reading date | |
| Average per year | 6,000 |
| Mileage consistency | Consistent |
Check CN18 VZK
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- Plate & colour change history
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- Service interval analysis
- Warranty work logged
Full MOT Test History 8 tests on record
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Reported issues for this Audi A3
These are the most commonly reported problems on Audi A3 models (2012–2020), based on owner reports and workshop data across the UK.
1. Carbon Buildup on Intake Valves
Direct-injection petrol engines like the CHZB lack fuel spray across the intake valves during the induction stroke. Without this natural cleaning action, carbon deposits accumulate on the valve stems and seats, restricting airflow.[2]
2. Turbocharger Actuator/Wastegate Linkage Failure
The actuator linkage connecting the wastegate solenoid to the wastegate valve becomes faulty or loose, causing loss of boost control. Many repair shops misdiagnose this as full turbocharger failure and recommend a costly replacement (€1,000+) when only the actuator arm needs repair (€150).[3]
Common faults, what to check, and what to pay
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Vehicle Details
| Registration | CN18 VZK |
| Make | Audi |
| Model | A3 |
| Colour | Black |
| Fuel type | Petrol |
| Engine | 999cc |
| Year | 2018 |
| First registered | |
| Area code | CN — Cardiff, Cymru (Wales) |
| Age identifier | 18 — March 2018 to August 2018 |
More CN18 V plates
Browse all CN18 V registrations from Cardiff.
About CN18 VZK
What car is CN18 VZK?
CN18 VZK is a black Audi A3, petrol (999cc). First registered in Cardiff in 2018.
What is the mileage of CN18 VZK?
The last recorded mileage for CN18 VZK was 61,049 miles, recorded on 30 Mar 2026 during its most recent MOT test.
Has CN18 VZK passed its MOT?
CN18 VZK has had 8 MOT tests with a 75% pass rate (6 passes, 2 failures). It last passed on 30 Mar 2026.
Is CN18 VZK ULEZ compliant?
Based on its fuel type and registration year, CN18 VZK 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 CN18 VZK?
CN18 VZK is approximately 8 years old. Age identifier 18 means registered between 1 March 2018 and 31 August 2018.