Nissan has tweaked the gearbox on the Juke crossover to cut road tax by up to £20 per year and improve fuel economy in petrol and diesel versions.
Running costs are lowered thanks to revised gear ratios in the manual transmission offered with the British-built Nissan Juke, but prices remain the same on affected models.
The 1.6-litre petrol engine and 1.5-litre dCi turbodiesel engines are both cheaper to run than before, according to official fuel economy figures.
The petrol delivers 139g/km - enough to cut £15 off the cost of road tax as it drops into Band E (£115 per year). It also means an improvement of 2.3mpg in fuel economy to a new figure of 47.1mpg.
Meanwhile the diesel option drops further to Band D of road tax and just £95 per year thanks to CO2 emissions of 129g/km. Fuel economy in the 1.5-litre diesel Juke is now 57.6mpg.
The Juke, a compact crossover which matches the design of an SUV with a small hatchback, has proved to be a popular car with UK buyers thanks to its eye-catching styling and low running costs.
The prices remain unchanged, meaning 1.6-litre petrol versions start from £13,395 in the entry-level Visia specification.
The 1.5-litre diesel is also available in Visia with prices starting at £14,795. Both are two-wheel drive models - a four-wheel drive version is only available on the high-spec Tekna trim and comes with a CVT gearbox.
Nissan says 22,000 have been sold in the UK since it went on sale towards the back end of 2010. As a relatively new car, the gearbox tweaks are the only changes to the Juke this year with a mid-range update not expected for another two years at least.
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