Question 1

How does the free London ULEZ checker work?

Accepted Answer

Enter any UK vehicle registration number. Caroat looks up official DVLA and MOT vehicle records to identify the fuel type, Euro emissions standard, and registration date to assess London Ultra Low Emission Zone compliance.

Question 2

What emissions standard does a petrol car need for ULEZ?

Accepted Answer

Petrol cars and vans must meet Euro 4 emissions standards to be exempt from ULEZ charges. Euro 4 became mandatory for all new passenger cars registered in the UK from January 2006 onwards, though some earlier models from 2001 to 2005 also meet the standard.

Question 3

What emissions standard does a diesel car need for ULEZ?

Accepted Answer

Diesel cars and vans must meet Euro 6 emissions standards to avoid the daily charge. Euro 6 was introduced for all new cars registered from 1 September 2015 onwards.

Question 4

Are hybrid vehicles exempt from ULEZ?

Accepted Answer

Hybrid vehicles must meet the relevant Euro standard for their combustion engine fuel type: Euro 4 for petrol hybrids and Euro 6 for diesel hybrids. Pure electric vehicles (EVs) are completely zero emission and compliant.

Question 5

What are the rules for motorcycles and mopeds?

Accepted Answer

Motorcycles, mopeds, and other two wheelers generally need to meet Euro 3 emissions standards, which became mandatory for newly registered motorcycles in 2007.

Question 6

Are historic vehicles exempt from London ULEZ?

Accepted Answer

Vehicles built over 40 years ago qualify for the historic tax class and are legally exempt from London ULEZ emissions charges.

Vehicle Type	Minimum Standard	Typical Reg Date
Petrol Cars & Vans	Euro 4 (NOx)	Generally 2006 onwards
Diesel Cars & Vans	Euro 6 (NOx & PM)	Generally Sept 2015 onwards
Electric Vehicles (EV)	Zero Tailpipe Emissions	All electric models
Hybrid Vehicles	Euro 4 (Petrol) / Euro 6 (Diesel)	Follows underlying fuel rule
Motorcycles & Mopeds	Euro 3 (NOx)	Generally 2007 onwards
Historic (40+ years)	Historic Tax Class	Rolling 40-year exemption

London ULEZ Checker

London ULEZ Standards Explained

Frequently Asked Questions