Plate age
The 17 plate
Checked on 7 September 2026.DVLA, INF104: vehicle registration numbers and number plates (as of 7 September 2026)
What does a 17 number plate mean?
It is the age identifier for march to august 2017. Spring series identifiers are simply the year, so 17 covers March to August 2017.
The scheme changes twice a year, on 1 March and 1 September, which is why British new car sales have two enormous months and ten quiet ones.
What a car of this season pays to tax
| Tax system | Lettered CO2 bands A to M |
| Careful | This season straddles a change of system. A car registered at the start of it uses lettered co2 bands a to m and one registered at the end uses first year rate by co2, then a flat standard rate. |
| Band range, 2026/27 | £20 to £790 depending on the CO2 figure |
Emissions standard and clean air zones
| Fuel | Euro standard | Note |
|---|---|---|
| Petrol | Euro 6 | Section D.2 of the V5C is the authority, and some manufacturers certified early. |
| Diesel | Euro 6 | The pass mark for a diesel in every UK zone is Euro 6. |
Compliant
Petrol: No Euro figure is recorded, so we have read it from the first registration date of 1 March 2017. New cars had to meet Euro 6 from 1 September 2015. Ultra Low Emission Zone (ULEZ) asks Euro 4 of a petrol car, so there is nothing to pay.
Compliant
Diesel: No Euro figure is recorded, so we have read it from the first registration date of 1 March 2017. New cars had to meet Euro 6 from 1 September 2015. Ultra Low Emission Zone (ULEZ) asks Euro 6 of a diesel car, so there is nothing to pay.
Where a plate of this season could have been issued
The age identifier says nothing about where the car came from. That is the memory tag, the two letters in front of it, and all 19 regions were issuing marks in this period.
Common questions
- What year is a 17 plate?
- A 17 registration was issued march to august 2017, so the car behind it was first registered between 1 March 2017 and 31 August 2017. Most people call it a 2017 car.
- How is a 17 plate car taxed?
- Lettered CO2 bands A to M. That means the rate never stops depending on the CO2 figure, so a high emitting car of this season pays the band rate every year of its life.
- Is a 17 plate diesel ULEZ compliant?
- No Euro figure is recorded, so we have read it from the first registration date of 1 March 2017. New cars had to meet Euro 6 from 1 September 2015. Ultra Low Emission Zone (ULEZ) asks Euro 6 of a diesel car, so there is nothing to pay.
- Does the 17 tell me anything about the car itself?
- No. The identifier records when the mark was issued and nothing else. A private plate transferred onto an older car hides its age entirely, which is exactly what many of them are bought to do.
Sources
- DVLA, INF104: vehicle registration numbers and number plates (as of 7 September 2026)
- DVLA, V149: rates of vehicle tax from 1 April 2026 (as of 1 April 2026)
- GOV.UK, Budget 2025 overview of tax legislation and rates, Annex A: rates and allowances (as of 1 April 2026)
- Transport for London, Ultra Low Emission Zone (as of 8 April 2019)