The uprated version of the firm’s 1.5-litre Skyactiv-G petrol engine will join the existing 73bhp and 88bhp models from 1 October, with new trim levels and improved efficiency.
Seven specification levels will be available, with the updated range starting from £16,475 for the SE-L.
All models are equipped with sat-nav, cruise control, Bluetooth and air conditioning as standard, and engines above the 73bhp model feature Mazda’s mild-hybrid system for an e-Skyactiv-G badge.
Sport models gain wireless Apple CarPlay, while the GT Sport adds a choice of a manual or automatic gearbox for the first time, as well as heated front seats, a colour head-up display and a reversing camera.
The new 113bhp engine will be available only for top-of-the-range GT Sport Tech models, starting from £20,845 and mated to a six-speed manual.
The GT Sport Tech gains adaptive LED headlights, blindspot monitoring, rear city brake support and a 360deg parking camera.
Mazda says all versions of its 1.5-litre engine now have improved efficiency, with increased compression ratios and an upgraded exhaust manifold, leading to a drop in CO2 emissions.
The 73bhp model produces 109g/km, while the range-topping 113bhp model produces 113g/km.
“The Mazda 2 is now more efficient than ever, while thanks to the generous equipment tally across all models, we have a distinctive and premium contender in what is still one of the most competitive segments in the UK car market,” said Mazda UK boss Jeremy Thomson.