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 Volkswagen Polo Petrol 999cc has had 3 MOT tests on record, passing every one. It has 23,536 miles on the clock, averaging 7,046 miles per year, below the UK average of 7,400. The 1.0 TSI engine is known for 1. carbon buildup on intake valves and 2. turbocharger actuator/wastegate linkage failure. Common Volkswagen Polo issues include infotainment system glitches and component affected.
MOT & Mileage History for CF21 GNZ
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 | 23,536 miles |
| Reading date | |
| Miles last year | 8,406 |
| Average per year | 7,046 |
| Mileage consistency | Variable |
Check CF21 GNZ
- Write-off & insurance claims Experian
- Outstanding finance check Experian
- Stolen vehicle check Experian
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- Plate & colour change history
- Franchised dealer records
- Independent garage visits
- Service interval analysis
- Warranty work logged
Full MOT Test History 3 tests on record
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Buyers comparing the Volkswagen Polo often also look at these models. Check their MOT history and reliability before deciding:
Reported issues for this Volkswagen Polo
These are the most commonly reported problems on Volkswagen Polo models (2017–2024), based on owner reports and workshop data across the UK.
Infotainment System Glitches
Component affected
What goes wrong
Symptoms
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
Explore more about the Volkswagen Polo
Thinking about buying this car? These resources will help you make an informed decision.
Vehicle Details
| Registration | CF21 GNZ |
| Make | Volkswagen |
| Model | Polo |
| Colour | Black |
| Fuel type | Petrol |
| Engine | 999cc |
| Year | 2021 |
| First registered | |
| Area code | CF — Cardiff, Cymru (Wales) |
| Age identifier | 21 — March 2021 to August 2021 |
More CF21 G plates
Browse all CF21 G registrations from Cardiff.
About CF21 GNZ
What car is CF21 GNZ?
CF21 GNZ is a black Volkswagen Polo, petrol (999cc). First registered in Cardiff in 2021.
What is the mileage of CF21 GNZ?
The last recorded mileage for CF21 GNZ was 23,536 miles, recorded on 27 Aug 2025 during its most recent MOT test.
Has CF21 GNZ passed its MOT?
CF21 GNZ has had 3 MOT tests with an 100% pass rate (3 passes, 0 failures). It last passed on 27 Aug 2025.
Is CF21 GNZ ULEZ compliant?
Based on its fuel type and registration year, CF21 GNZ 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 CF21 GNZ?
CF21 GNZ is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.