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Hi Cesar,

Yes, pretty much an instant fail there. If you take out the cat and the EGR valve you're going to push your emissions readings up significantly. Please don't do it - that equipment is there for a reason.

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Hi David,

Yes it does. Post 152-registration it got an updated engine with a urea injection system so it won't be affected by the 'defeat device' software. Examples before that though are on the Volkswagen Group's recall list. Only way to check for sure is to put your registration into the special website, as described here.

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Hi Michael,

It depends on the model but if it's the Octavia 1.9 105hp then the CO₂ emissions are officially quoted as 135g/km, so you'll pay €280 a year to tax it. If it's a Fabia hatchback 1.9 TDI then it'll be €270 (129g/km of CO₂), a Roomster 1.9 TDI will set you back €390 (145g/km) and a Superb the same €390 (153g/km).

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Hi Damien,

No, it's the same EP6 model 1.6-litre petrol engine, with 120hp and CO₂ emissions of 145g/km.

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Hi Charles,

I assume you mean this Volkswagen story. At this stage we have been told that it only affects certain cars powered by the 2.0-litre TDI engine, but not all of them. So, going by current information, the 2014 model year 1.6 TDI Audi A3 Saloon is not effected. Keep an eye on our news page and social media feeds however, as we expect more news to emerge in the coming days.

Kind regards

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Hi Martin,

There are a few, actually. Volvo sells the V60 D5 Twin Engine here in Ireland, which is a plug-in diesel-electric hybrid, while Citroen sells the DS 5 Airdream Hybrid4 200. Peugeot used to sell the 3008 HYbrid4 too, but it doesn't appear to be on the price list now, while Mercedes-Benz has had diesel-electric hybrid tech for a few years.

In fairness, we don't expect them to get any more plentiful or popular. Hybrid technology is expensive to produce and diesel technology is more expensive than petrol, so putting two expensive sets of components together inevitably means a high purchase price, even if the emissions are low and the VRT is kept in check.

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Hi Sean,

Yes you can. It'll set you back €1,250 a year in tax though with 220g/km emissions.

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Hi Noel,

I'm actually one of the (few) motoring writers who kind of likes the Pulsar - it's not in the slightest bit exciting but it's comfy, spacious, economical and OK to drive.

The Leaf is different - it's far more of a ground-breaking car and genuinely high-tech, plus of course there's the whole concept of it being entirely free from pollution and emissions at the local level. Buying one though does mean making sure that your driving pattern and lifestyle fit the Leaf's capabilities. With between 160- and 200km on a single charge being the absolute best you can get from it, it's still really only a car for those covering short journeys and mostly city mileage. Do you regularly take long journeys or spend a lot of time on the motorway? Then the Leaf, as yet, is not for you.

Read our review of the Nissan Pulsar here

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Hi John,

You'll need to know its CO₂ emissions rating to work out the VRT you'll have to pay. If you have its registration number in the UK you should be able to get that from the Cartell.ie website, where you can also do a full history check on the car for a small fee.

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Hi Carmel,

If you're a low-mileage driver then, yes, petrol is generally the better choice. You can keep your diesel though by sticking to a couple of rules. Regular maintenance by a qualified mechanic, always using high quality synthetic oil and making sure the car gets a regular long spin to build up the temperatures in the exhaust system.