The Mii is cheaper to buy than its sister car, the Volkswagen Up, but it’s more expensive than the almost identical Skoda Citigo. Still, it’s good value compared with most city cars. Running costs are low, helped by engines that are efficient on paper and economical in our real-world True MPG tests. The Ecomotive version is officially the most economical Mii and is the only one that is exempt from road tax, but the amount a private buyer will save each year in running costs is likely to be small.
Insurance premiums will be extremely cheap whichever version you choose; in fact, the lower-powered model is in the lowest insurance category, so is ideal for young drives.
Resale values are good, if not quite up to those of the VW Up.
The Ecomotive model makes most sense for company car drivers because of its low CO2 emissions. However, all versions offer cheap benefit in kind tax bills.
Seat Mii equipment
Entry-level S versions aren’t blessed with much standard equipment – even air-con isn’t on the list. Ecomotive models do get air-conditioning, as well as electric front windows, remote central locking and a rev counter.
Our favourite trim is SE, which adds alloy wheels, a smarter interior and powered door mirrors. Going for I-Tech or
Sport trim adds the portable touchscreen infotainment system, but they’re not quite such good value as SE versions.
It’s worth going for the optional digital radio, while heated seats are another desirable addition.
Seat Mii reliability
The Mii didn’t feature in our most recent ownership satisfaction survey, but the almost identical VW Up did and was rated as the most reliable car in its class. There were a few issues with the Up, however. The main problems were with its manual gearbox, parcel shelf and sat-nav system, but overall the Up suffered far fewer problems than its main rivals.
Like all Seats, the Mii comes with a three-year/60,000-mile warranty and one year’s breakdown cover. This is comparable with the cover provided by most car companies, but falls short of the five-year/100,000-mile warranty you get with the Hyundai i10.
Seat Mii safety & security
All Mii models have two front airbags, plus side airbags that extend upwards to also cover the same area as curtain ’bags. Airbags that help protect rear-seat passengers are not available. Stability control, Isofix child seat-mounting points on the rear seats, and a tyre pressure-monitoring system are standard, though, so the Mii has a similar amount of safety kit as many newer city car rivals.
Automatic city emergency braking is a reasonably priced option on all versions apart from I-Tech, which oddly can’t be specified with it.
The Mii achieved the maximum five stars in its Euro NCAP crash test in 2011, with scores of 89% for adult protection, 80% for child protection and 46% for pedestrian protection.
Security experts Thatcham awarded the car four out of five for its resistance to being stolen, and three out of five for its resistance to being broken into.
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This entry-level Mii isn’t blessed with much equipment – steel wheels, a radio, CD player and aux connection are included, but air-con isn’t on the list, even as an option.
Fuel-sipping Ecomotive models get air-conditioning, as well as electric front windows, remote central locking and a rev counter. You get split-folding rear seats, too, but not alloy wheels. Its low CO2 emissions make it a good choice for company car drivers, but most private buyers will be better off with an SE version.
Our pick SE
This is our favourite trim because, as well as all the kit of the Ecomotive version, it has alloy wheels, a smarter-looking interior and electrically adjustable door mirrors for a small increase in price.
The biggest news is the addition of the touchscreen infotainment system, which includes sat-nav and Bluetooth. There are also a few bespoke styling features, but it’s worth noting that some desirable optional extras aren’t available on this trim.
Range-topping Sport trim comes with all the kit you get on the I-Tech, plus larger wheels, front foglights and lower sports suspension. It’s pricey, though.