Expert answer

Hi Laura,

I'm afraid there doesn't have to be visible water/oil mixing for there to be a head gasket problem so that may well be the issue. Before going to get that work done you should park the car somewhere dry and clean underneath and let it run and keep an eye under the engine. Are there any visible water leaks? It could be as simple as that.

If not, bring the car to a garage to have the system pressure-tested etc. Don't delay though; if the head gasket is gone and you continue to drive it, you really could do a lot of damage.

Best of luck

Expert answer

Hi Cormac,

Go with the Octavia or the SEAT - both are comfy for long journeys, frugal on diesel as long as you go for the 1.6 TDI and both should work out a little bit cheaper to service and run than the Golf, if only fractionally. It's worth shopping around to see if anyone has any inclusive service or extended second hand warranty offers on the go - both can save you a fortune further down the line.

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Hi Pauline,

I think your best bet is to go for a Honda Civic 1.4 EX with the CVT automatic transmission. High seats, lots of space, comfortable, frugal, reliable and yes it has standard folding electric mirrors in that spec.

Honda Civic review

Expert answer

Hi Sinead,

Probably the Volvo XC90 - whatever about EuroNCAP scores, Volvo always makes its cars real-world safe, basing its design on data taken from actual, real accidents and not just lab testing.

If you mean something a bit more conventional and cheaper than an XC90, then according to EuroNCAP the best performing are the Volkswagen Sharan and SEAT Alhambra, both of which scored a maximum five stars, with the Sharan getting a 96 per cent mark for adult occupant protection, 80 per cent for kids, 46 per cent pedestrian protection and 71 per cent safety assist. The Alhambra's marks were identical.

Relevant reviews:

Volvo XC90 review

SEAT Alhambra review

Expert answer

Hi Jules,

You could be on to something there alright. The 9-3 is generally a pretty reliable car, although you have to watch carefully for things like engine ECU problems (if it's slow to fire up or runs sluggish then walk away) and gearbox and clutch issues. 

As for parts - there is definitely a price difference. A quick trawl of the listings over at micksgarage.ie will show you that, for instance, a replacement front wing for the 9-3 will cost you €114 whereas the same part for a contemporary BMW 3 Series will only set you back €70.  That's not the case right across the board for all parts but there is definitely a premium charged for Saab bits.

Expert answer

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 Aiden,

No, you're not missing anything. French cars, and big French saloons in particular, always suffer staggering depreciation and the 407 is not a car that's especially loved by the used trade. 

There's nothing much mechanically wrong with them but make sure you check that all of the electrical bits and pieces are working, and check the cabin for loose or ill-fitting pieces of trim. Then check the suspension, especially at the front, for any damage. Listen for clonking or knocking noises and check the tyres for signs of uneven wear.

Expert answer

Hi Ben,

OK, first off, if it's a second car for short journeys and low mileages, go and track down a petrol model. That shouldn't be too hard if you're looking pre-2008, and it will save you from getting diesel particulate filter problems later.

Of the three, the Tuscon would probably be the most painless to own - it has a great reliability record and the 2.0-litre petrol version is decently frugal. Worth looking at a Kia Sportage of the same vintage too - it's mechanically identical and, to our eyes, slightly better looking.

I'd avoid the RAV4. That generation of RAV was very short on refinement and they tend to need clutch and flywheel replacements as the miles build up. Not a patch on the current, much more sophisticated RAV4.

The X-Trail is well worth a look too. You might struggle to track down the rare 2.0-litre petrol version, but it's worth doing so - it's more reliable than the diesel version and, as long as you go for the second-generation X-Trail, introduced in 2007, you're getting a massively spacious car that's surprisingly good to drive. Be picky though - it has to be that second-gen model, as the first X-Trail was a bit underwhelming. If you can't find a nice one, revert to the Tucson or Sportage.

Expert answer

Hi Syd,

It's a split decision I'm afraid - the Scenic is going to be much comfier and more refined, but the Opel will be the more reliable one. You'll have to make your own call based on what you prioritise most.

Expert answer

Hi Brendan,

X5. Yes, it's bigger, heavier and (on paper) thirstier than the Lexus, but it's also far nicer to drive, more spacious and actually, in the real world, probably a little more frugal than the RX 450h. The Lexus' only advantages are lower motor tax and the fact that it will be more reliable long-term than the BMW, but if you buy the Beemer with a  full service history and look after it properly, you shouldn't have any major problems.