Expert answer

Hi Gary,

The only major recurrent problems seem to be exhaust gas recirculation (EGR) valves that can get sticky (a smell of unburned diesel is the giveaway) and a weak timing belt tensioner that needs regular attention. There's an excellent UK-based owners club at stdrivers.co.uk and the forums there are full of helpful advice. Apparently, in the UK, some of the parts for the 2.2 diesel engine are cheaper from Jaguar dealers (the same engine was used in the X-Type), but we're not sure if that holds true here. Lovely car the ST TDCi, although I do recall from my (long ago) test drive that the brakes needed a hell of a good shove to work hard...

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Hi Martina,

We're assuming you are referring to the post-2008 Focus here, so correct us if not. The 1.6-litre models are up to 10mpg more efficient and generally have much lower emissions too to help reduce your annual tax bill.

Be aware that the 1.6 TDCi engine only had issues from 2004 until about 2008. Cars/engines made after that date should be just as reliable as the 1.8-litre.

Hope that helps

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Hi Shane,

That’s a Mk1 Focus, yes? They’re OK, but obviously the youngest is a teenager by now, so you need to be careful. Check the oil for signs of water mixing in — they do develop problems with the heat exchanger. Check that the engine runs smoothly, as the TDCi had one of the first high-pressure direct injection systems and it’s delicate and needs regular proper servicing to work well. Black smoke could mean a blown boost pressure valve. Inside, check for leaking windscreen (wet carpets), broken gear lever springs, faulty ‘QuickClear’ windscreens and inoperative instruments.

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Hi Fergal,

This engine downsizing is prevalent and not just by Ford, and it has been made possible thanks to advances in engine technology, such as high pressure fuel injection and turbocharging.

A close look at what's offered by Ford Ireland reveals that the Mondeo 1.6 TDCi is the 115hp version, where as the Focus can be had with that and a cheaper 95hp unit. The raw data reveals that the 115hp Focus does the 0-100km/h sprint in 10.9 seconds - a second faster than the Mondeo with the same engine. Likewise, the Focus is more efficient with lower emissions and fuel consumption - though the differences are not as big as you might think.

Essentially, it boils down to the engine's torque output. This engine produces 270Nm from as low as 1,750rpm, which is more than enough to deal with a car the size of the Mondeo. Naturally a 2.0-litre diesel with the same technology will be more impressive again, but the 1.6 is just fine.

For the record, we find that Ford's 1.6-litre TDCi engine has a very narrow power band, but once you learn to keep the engine within that it never feels slow. Obviously, driven like that it won't come close to its official fuel economy figures.

Hope that all helps.

Expert answer

Hi Phil,

That's a really tricky one. It's possibly to do with the immobiliser, as the car's keys are coded to a particular engine control unit (ECU) etc. Can your mechanic interrogate the ECU for fault codes?

Come back to us if we can help any further

Expert answer

Hi Tommy,

First up, gearboxes: a six-speed gearbox in a given car usually means it is officially more economical than it would be if it had a five-speed gearbox, but that really will depend on the type of roads it's driven on and the driver's own style. It's not correct to say that a six-speed Renault, for example, is automatically more economical than a five-speed Ford though, as there are many more factors to consider. Best to look at the official combined consumption figures as a gauge - even though they're not usually achievable in the real world they are a good measure of one car against another.

A quick search on Carzone.ie reveals that your budget may get you into a 2009 Ford Focus 1.6 TDCi. There are plenty of different trim levels and 90- or 110hp derivatives available so take a close look at the specifications, history and mileage. Most of those are now in Band A4 with emissions of less than 120g/km and fuel consumption as low as 4.3 litres/100km (65.7mpg).

In terms of Golfs, it looks like you'd be lucky to get a 2008 version (the old one) for that same money, which means it'd have to be a 1.9- or 2.0-litre TDI engine. These cost more to tax (especially if you go pre-2008) and are a little less econonomical than the Focus above.

There don't seem to be many Renault Méganes fitting your description and budget, though a look elsewhere reveals that you may find a 2010 version at this price powered by the 1.5-litre dCi engine. This came in 86- and 110hp guises. The former is virtually as economical as the Focus and the latter only uses a little more fuel.

Finally, the Citroen C4: in terms of economy, the 2008 1.6 HDi 92hp engine is up there with the Focus etc, though there are more powerful versions available too.

In summary, if fuel economy is your priority then it's probably best to stay away from the older Golf, with its larger engine. The others are all very close and so it comes down to personal preference. We'd go for the Focus, not least because of the much wider choice of examples on the used market.

Come back to us if you need more assistance narrowing your search.

Expert answer

Hi Paul,

These have both a chain and belt set up. The belt (known as a 'wet belt') is immersed in oil to reduce Noise Vibration and Harshness (NVH) and is recommended to be changed before 200,000 kilometres or ten years, whichever comes first. As the belt is immersed in oil, it is imperative that the vehicle is serviced regularly and correctly (every 20,000km or once a year) to ensure the longevity of the belt.

Hope that helps

Expert answer

Hi Michael,

Average price for a 2011 Focus should be around the €8-9,000 mark depending on condition and history. The official fuel consumption for that model was 4.4 litres per 100km, or 64.2mpg. 

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Hi Joseph,

Yes, generally very reliable, but that 1.8 TDCi engine did have some issues with the fuel injection system, the dual mass flywheel and the turbo, so if you could instead track down one of the 2.0 TDCi models, you’ll be getting a slightly better, more robust car. That said, with this one being ten years old already, you’ll need to carefully check everything and don’t buy unless it comes with a full service history.

Expert answer

Hi Sean,

I don't think you're asking for too much actually, so long as you don't mind a car that's a few years old. There's plenty of choice at that price point. You've not told us how big a car you need or how far you drive each year so we're keeping an open mind there, but only shortlisting diesel saloons and hatchbacks. Options include:

- Ford Fiesta 1.4 TDCi

- Ford Focus 1.8 TDCi

- Ford Mondeo 2.0 TDCi

- Nissan Note 1.5 dCi

- Peugeot 407 1.6 HDi (only if it has a full service history)

- Skoda Octavia 1.9 TDI

Come back to us if you need help narrowing things down further.