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Hi Tom,

A traditional 'dry' timing belt, mostly made of rubber, runs in air behind dust covers. A 'wet' belt is of similar construction but actually runs in oil behind sealed covers. The theory is that this reduces heat, friction and noise while enhancing reliability.

Unfortunately, the material of the belt can be damaged by contaminants in the oil itself, causing premature failure of the belt or other engine damage caused by bits of the belt clogging up other components.

Not every car that has a wet belt has an issue, but they certainly have a bad reputation.

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Hi Frank,

It's the timing belt itself that you've heard about most likely as, on some versions of the 1.0-litre Ford EcoBoost engine, it is what's called a “wet belt”. That means the timing belt actually runs in oil, where most timing belts do not.

Ford isn't alone in having problems with them. The rubber in the belts can degrade due to many issues including use of the wrong engine oil and impurities in the oil as it gets older.

The good news for you is that, while earlier examples of the 1.0-litre EcoBoost engine did use this setup (though not all), and Ford dropped it from 2022 on, the MHEV engines always used timing chains instead and they should therefore be more robust.

However, even those later engines use a rubber belt to drive the oil pump and that still runs in oil so potentially has all the same issues. It is too new for those problems to have come to light and Ford believes it is designed for the life of the engine because it is under far less stress than the timing belt was.

All we can advise is that you carry out oil changes a little sooner than recommended and that you always use the correct specification of oil.

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Hi Tanya,

There should be a manual external boot release — on an 07 Jetta it’s a rubberised switch, up under the VW logo and above the number plate. If that’s not working then it could explain why the key fob release is being inconsistent. Either way, a visit to your Volkswagen dealer is probably in order. It may just be that the battery in the key needs replacing, but you may need a new key, or at worst a replacement boot release. 

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Hi Sue,

It's unlikely that your car will pass the NCT in that state. It's very possible that the rubber boots over the CV joints have been damaged and the car could be declared to have a dangerous defect, which means you would not be allowed to drive it away from the NCT centre. This is a safety issue, not just a noise problem, so you really shouldn't drive the car until you get it fixed.

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Hi Declan,

Yup, it's exactly the same car. Opel changed the styling at the front, tidied up the dashboard design and gave it some new engines, but the overall structure, body and dimensions remained the same. 

Read our Opel Mokka X review here

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Hi Justin,

It was always a nice car to drive and never less than pretty, but watch out on the reliability front - it comes from Merc's dodgy period. The engines and gearboxes are pretty solid but everything electrical is suspect, and the interiors are pretty poorly built in some cases. Watch the frameless glass in the doors too - it can slip away from its rubber seals and let in a lot of wind noise. 

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Hi Niall,

I wonder if you've given us the exact description or if it has been described to you incorrectly. The only mention of 'anti-slip' in the NCT manual is with regard to the rubber pedal pads in the car. It can fail the NCT if they're missing or no longer effective. However, that has nothing to do with the rear axle, so I suspect your car failed on rear wheel side slip, which means there's a misalingment issue in your rear suspension. The limit is pretty lenient so yours must be pretty bad. I'm surprised the tester didn't say more about it. 

Bring the car to a good mechanic to have it sorted. Hopefully it's just something that can be adjusted and no actual damage.

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Hi there,

If you mean the all-new models, the replacements for the current Mégane and Astra, then yes, there'll be a massive difference. They're two entirely different cars built to different specifications in different factories by different companies. OK, so they're both mid-size family five-door hatchbacks, but that's where the similarities end. Obviously, we cannot say for certain yet, as we've driven neither car in final production spec, but the current cars differ quite a bit. The Astra feels classier and better built, the Renault is rather more engaging to drive (in spite of every rubbery steering). Will those characteristics carry over to the next models? We'll have to wait and see...

Here's our first news story on the new Opel Astra

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Hi Dermot,

Really nice car the Insignia. Good looking, nice to drive and good quality. The 2.0 CDTi 163hp diesel engine is the one to go for, although if your pockets are deep enough you could try tracking down the vanishingly rare 2.0 SRi Turbo 265hp 4x4...

If you're buying used, check everything electrical for any problems and especially check the central locking and alarm system. Check the boot too for any sign of water getting in past the rubber seals. Other than that, as long as you get one with a full service history, you should be fine.

Opel Insignia 2.0 CDTi review

Expert answer

Hi Declan,

Even though your Polo has such low mileage, rubber timing belts perish over time so it's recommended that they are changed regardless of mileage. Volkswagen recommends that the 1998 Polo 1.4's belt is changed at least every four years.

Better safe than sorry