co2 emissions | Ask Honest John

Ask Honest John

Most recently answered co2 emissions questions

Why did the emissions for the Ford Fiesta 1.25 Zetec change?

The emissions on the Ford Fiesta 1.25 Zetec were 120g/km, which put it in band C, Euro 5 and £35 tax. Then in Jan 2015 the emissions suddenly went to 122g/km and went into band D, Euro 6 and £150 tax....

A newer version of the same model car has higher CO2, why is this?

I have just purchased a 2021 (21 plate) Ford Focus ST-Line 1.5 diesel 120hp and part exchanged a 2019 (19 plate) Ford Focus ST-Line 1.5 diesel 120hp because it was approaching a 5 year old cut off that...

My car has failed the MoT on emissions - how can I fix this?

My BMW Z3 is failing the Irish NCT (equivalent to MoT) on CO2 emissions. Do I need to change the catalytic converter?

Can I get the tax band of my car changed?

I have owned a 2014 Volkswagen Caravelle 2.0 TDI for the last 3 years and have pad £340, £360, and £395 car tax for those three years. It states on my registration document that the CO2 is 203g/km but...

I'm looking to buy either a new Jaguar XE or a Genesis G70 - which is the better option?

We are looking to replace my car in the next six months and need a bit of your advice. My wife has taken a shine to the Jaguar XE so we have been looking at a new one. I have moved away from diesel engines...

How environmentally-friendly are electric vehicles?

The more I read the less convinced I am about the supposed environmental benefits of electric cars. Volvo has said that the energy used to create them is far in excess of that for a petrol or diesel...

Why are their differing mpg ans CO2 figures for some models?

I'm looking to buy a used Hyundai i10 but am confused by the differing mpg and emissions data for the 2017 - 2019 1.0-litre models. I did not think that the i10 had been changed during this period. Is...

What can I do to make my Land Rover ULEZ compliant?

I have a 2011 Land Rover Freelander 2 diesel. What can I do to get through London's Emissions. The car has EUR 4, and I think it has to be better than 6.

How do I check the EU exhaust rating of a car I want to buy?

I have been offered a second-hand Volvo V90. The dealer says they cannot confirm its EU exhaust rating but has given me its VIN to check. How do I do that?