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 6 MOT tests on record, passing every one. It has 11,675 miles on the clock, averaging 1,030 miles per year, well 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 GN18 JHA
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
Low mileage| Latest reading | 11,675 miles |
| Reading date | |
| Miles last year | 1,311 |
| Average per year | 1,030 |
| Mileage consistency | Consistent |
Check GN18 JHA
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- Warranty work logged
Full MOT Test History 6 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 | GN18 JHA |
| Make | Audi |
| Model | A3 |
| Colour | Black |
| Fuel type | Petrol |
| Engine | 999cc |
| Year | 2018 |
| First registered | |
| Area code | GN — Maidstone, Garden of England |
| Age identifier | 18 — March 2018 to August 2018 |
More GN18 J plates
Browse all GN18 J registrations from Maidstone.
About GN18 JHA
What car is GN18 JHA?
GN18 JHA is a black Audi A3, petrol (999cc). First registered in Maidstone in 2018.
What is the mileage of GN18 JHA?
The last recorded mileage for GN18 JHA was 11,675 miles, recorded on 5 Mar 2026 during its most recent MOT test.
Has GN18 JHA passed its MOT?
GN18 JHA has had 6 MOT tests with an 100% pass rate (6 passes, 0 failures). It last passed on 5 Mar 2026.
Is GN18 JHA ULEZ compliant?
Based on its fuel type and registration year, GN18 JHA 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 GN18 JHA?
GN18 JHA is approximately 8 years old. Age identifier 18 means registered between 1 March 2018 and 31 August 2018.