Expert answer

Hi Shirley,

Generally speaking, the Micra (especially the 2002-onward model, which is probably the best Micra there's ever been) is something of a gold standard for reliability, but there are a couple of small recurring items to look for. The immobiliser system can sometimes go a bit haywire and drain the battery, the seat adjustor cables can snag, the boot and door seals occasionally leak and if you hear a knocking noise from the steering on full lock it means the front suspension is out of alignment.

Other than that, cracking little car and it should give years of solid service.

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Hi Chris,

The thing to bear in mind here is that the engine rarely has to directly power the wheels; most of the time it operates (at set optimum speeds) to turn the generator and charge the battery pack. Other than that, when it does power the front wheels it's at specific speeds in particular conditions, for which we assume it has been calibrated. The addition of a CVT may well enhance the situation, but it would add another chunk of weight to an already heavy vehicle.

Electric motors don't need a continuously varying gear ratio to operate efficiently.

You can read our drive of the Mitsubishi Outlander PHEV here

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Hi Deck,

There seems to be a bit of split in S-Max ownership between those who have solidly reliable cars and those who keep suffering annoying niggles. Electrical faults are surprisingly common, and can range from knackered windscreen wipers to a fault that drains the battery over the course of a couple of days. Other have complained of some loose-fitting interior trim, especially around the doors. Keep an eye out too for clonking noises coming from the steering, stiff brake pedals or the diesel engine cutting out mysteriously.

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Hi Ernest,

Toyota previously answered a question for a reader regarding battery life as follows:

"It depends on the vehicle and how it's driven, but as long as the vehicle is in regular use and is serviced then the battery life is expected to be over 10 years. High mileage batteries can last longer than vehicles that do low mileage or are not in frequent use. Like any other battery type if it is in regular use and kept conditioned this will extend the battery life."

We can confirm that there are no known health risks from the batteries. The cost of replacing the batteries varies from model to model.

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Hi Catherine,

Not necessarily. The 1.6-litre diesel used in the C-Max is an engine used in a huge variety of cars, from the C-Max to the Focus to the Mondeo to various Citroens, Peugeots, Volvos and even the occasional MINI. This means that, by and large, it's a decent engine with good reliability prospects and millions of miles of use in a massive number of cars to reveal any bugs.

That said, there are a couple of issues to watch for and mostly it's to do with the turbocharger, which can occasionally be a weak point. Usually it's down to a failure of the exhaust gas recirculation (EGR) valve, and it can be pretty easily fixed. Watch the parts prices and shop around for quotes if anything does go wrong. Alternators can give trouble too, so be suspicious of any engine or battery warning lights.

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Hi Louis,

We thought it best to send this one to Toyota's tech people as they have more experience than most. Here's what they told us:

"It depends on the vehicle and how it's driven, but as long as the vehicle is in regular use and is serviced then the battery life is expected to be over 10 years. High mileage batteries can last longer than vehicles that do low mileage or are not in frequent use. Like any other battery type if it is in regular use and kept conditioned this will extend the battery life."

Hope that's of interest

Expert answer

Hi Bernadette,

I'd say between €7,000 and €8,000 on a trade-in, depending on what you're trading it in against.

Expert answer

Hi Tony,

It's the electrical systems that are the E-Class's Achilles' heel. Mercedes had so many problems with the 2002-2009 model that it actually had to replace entire interiors and indeed entire cars for some irate customers. So, check everything very, very carefully and if even one little switch isn't working, walk away. If the car has had remedial work done by Mercedes, ask to see the paperwork to see exactly what was done. Check too that the automatic gearbox selects gears quickly and easily. 

The battery is prone to running flat too, if the car is left standing for a few days, and the computer that controls the brakes can go haywire too. Also check the paintwork for poor finish or flaking.

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Hi Tom,

If the stop-start system is not working ever then it's probably worth a trip to your Audi dealer to have it looked at, but bear in mind that there are plenty of conditions in which it will not operate and it may not be immediately obvious why. Here's Audi's official stance on it:

"The system is automatically activated when the ignition is switched on. If the driver doesn't want to use it, it can simply be switched off at the touch of a button.

"This is how it works: brake the car down to a standstill, shift into neutral and release the clutch. The system now switches off the engine and signals this via an indicator lamp. Depress the clutch before continuing the journey - the engine now starts automatically and the indicator lamp goes out again.

The start-stop function only works when...

• the driver's door and the bonnet are closed
• the driver is wearing a seat belt
• the vehicle has been driven at faster than 4km/h before stopping
• the vehicle is not pulling a trailer

In some cases the engine will not be switched off, for instance when...

• the engine temperature is still too low
• the difference between the interior temperature and the temperature selected via the air conditioning system is still too great
• the outside temperature is very high or very low
• the windscreen is being de-iced
• the optional parking aid or the optional park assist is activated
• the battery charge is too low
• the steering wheel is at a sharp angle or is being turned
• reverse gear is engaged
• the road is steep

The engine is started automatically by the system when...

• the vehicle rolls forward
• the windscreen is being de-iced
• there is a large difference between the interior temperature and the temperature selected via the air conditioning system
• the brake pedal has been depressed several times in succession
• the battery charge is too low

Expert answer

Hi Alan,

Electric Ireland charges a standard 19.28 cent per kWh as of Jan 20th 2014, according to moneyguideireland.ie. Other suppliers charge more or less the same although there can be a variation of up to 3c per kWh. 

In terms of what is charged to charge an electric car, the energy companies make no distinction. The plug points are downstream of your electricity meter so it's counted as the same juice that goes into your fridge, dishwasher or vacuum cleaner.

The total amount of tax charged on your kWh amounts to about 11 per cent, including both VAT and Carbon Tax, according to Sustainable Energy Ireland. 

So, why is this so much lower in tax terms than the 50-odd per cent levied by various charges on pump fuel? Simple: expediency. On the one hand, the Government must be seen to be encouraging the use and development of electric motoring. On the other, there is currently no simple and reliable way to distinguish between electricity being pumped into your car's batteries and what's being used to light, heat and wash.

That said, you can sadly and safely expect that to change, rapidly, if electric car sales ever take off in a big way. The Government has been very careful and canny about making sure that improving vehicle economy hasn't eroded it's annual €1 billion+ tax take from petrol and diesel sales, so if battery cars start eating significantly into that, expect some form of battery levy or electron tax to be enabled tout suite.