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Hi Alanna,

Anything pre-2008 with a petrol engine is pretty hard to shift on these days, sadly, so I'd reckon you're looking at a value of possibly as little as €5,500 for the Mazda3 at the moment. To get the best from it, I'd suggest staying within the Mazda family (a Mazda dealer will usually give you a better trade-in on a Mazda than will another dealer) and trade up to a Mazda6 Estate. Loads of space, brilliant to drive, reliable and, with the 2.2-litre 129hp diesel, very economical too. SUV? Do you live up a mountain or at the far end of a rutted dirt road? No? Then you don't need one - stick to the family car market and the Mazda6 size class (which also includes cars like the Toyota Avensis, Ford Mondeo, Volkswagen Passat and Opel Insignia) is  where you'll get the best bang for your buck.

Let us know how you get on

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Hi Diarmuid,

On the site we have a full test of the XF Sportbrake estate here, powered by the diesel engine. I never added in the average economy figure as my driving that week was mostly in an urban setting. For the record, it used about 9.0 litres/100km (31.4mpg). It should do a lot better on the motorway.

Is that of help?

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Hi Ronan,

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Hi Zak,

We always did like the C5 when it was new — big, comfy, quite stylish and it really does look best as an estate. Your ‘friends’ are right in that the Mondeo or Avensis will hold their value better, and there’s no getting away from the fact that an Avensis would be much more reliable over the long term, but at seven years old, the C5 will have the worst of its depreciation behind it now, so as long as it comes with a full service history and you keep it looked after, we wouldn’t regard it as a bad purchase.

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Hi Michael,

They’re pretty solid, but watch for issues with the 1.6-litre diesel engine (exhaust filter, water pump, turbo) and the ignition and central locking system. Make sure it has a full and complete service history and don't ignore the warning lights.

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Hi Catherine,

A rough estimate of your C4's value should give you a budget of around €12,000 (and you might even do a bit better than that if you're lucky). Even at that level though, there is a plethora of cars matching your description out there. How about we start with something really classy? A BMW 316i maybe? Plenty out there, all priced around €11k and the 1.6-litre engine means reasonable tax and fuel economy even though it's a petrol engine.

Or you might need something a bit more spacious and economical. So we found a Citroen C5 Tourer estate with the 1.6-litre HDi diesel engine. It's a 2008 model so you'll be on the new CO₂-based tax system, it's massive inside and very comfy. Well built too.

Finally, you might fancy something a bit more compact and cheaper to run, and that budget opens up a world of Ford Focus saloons and estates with either the 1.6-litre petrol or 1.8 diesel engines. Simple, spacious, reliable and plentiful, you won't go wrong with that one.

WHat do you think?

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Hi Catherine,

OK, so what you need here is something spacious (kids, even just the one, take up a heroic amount of space, as you know), something economical for all that annual mileage and something comfy so that your buttocks survive all that mileage. I think you should stay with the current rough size of car, as some of the best bargains can be found in the mid-size saloon segment.

First up is a Volkswagen Passat. Ideally, you'd get the 1.6 TDI BlueMotion version, a car in which we once managed to drive from Galway to Glasgow and back on one tank of fuel. Or, what about a Ford Mondeo? You'll easily get a 2.0 TDCi model for that money, and there are very few cars quite so comfy on a long journey. Even BMWs and Mercs can't always match the Mondeo for seat comfort.

Of course, if you fancy the high life, and are prepared to compromise on space a little, then there's the BMW 3 Series. You'll get a 320d or 318d for that kind of budget, but shop around to make sure you get one in a dark metallic, with leather and preferably an automatic gearbox.

Finally, there's the Mazda6. Bit of an unsung hero of this segment, it's brilliant to drive, spacious, good looking and you should be able to track one down with Mazda's excellent 2.2-litre diesel engine under the bonnet. Reliable as it gets, it should chomp through your annual mileage with nary a worry. Find the even more handsome estate version if you can.

Come back to us if you need help narrowing this down.

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Hi Gavin,

Here's the checklist for a 2002 Volkswagen Golf (hatchback or Estate):

- Check that alloy wheels have had copper slip grease applied behind them at each service, or the alloy can react with the steel hub and cause corrosion.

- Make sure the headlamps are in good condition, as they're a bumper-off job to replace.

- The rear screen wash-wipe can leak and run into the lock, shorting out the alarm and central locking. The door locks in general can give trouble.

- Most Golf engines need a cambelt change every 40,000 miles (64,000 kilometres). Diesel engines tend to get through a lot of oil.

- Clutch release bearings can wear out easily leading to a hefty clutch action.

- Ignition coils can burn out.

- A whirring noise could be a water pump failure.

- Slow starting or engine management lights often mean a temp sensor has failed.

- A tapping noise on start up may mean you need a cylinder head rebuild.

- If the car has sluggish acceleration it could be a crank or camshaft sensor failure.

- And if there are any issues with any of the main instruments then he whole display has to come out and be replaced.

That's a long list, we know, but if the car you're looking at passes those tests then it's likely to be a good one.

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Hi John,

A creaking noise at the back usually means the dampers need replacing, but we don't know of any widespread issue with wishbones, suspension arms and link arms wearing earlier than they should. There aren't a lot of those cars about so data is thin on the ground.

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Hi Robert,

There’s lots of choice in that price bracket for an estate. You could go posh with an Audi A4 Avant TDI (you’ll get into a 2007 model for that budget), or big and practical with a Toyota Avensis (2011 or thereabouts), or sporty with a BMW 3 Series Touring. However, you’re probably best going for a Golf — that budget gets you a 2008 or 2009 Golf Estate, which is roomy, practical, reliable, and nice to drive.