The family hatchback, which is based on the same platform as the Volkswagen Golf and Audi A3, received a massive 92 per cent score for child occupant protection.
This means the new 2013 Leon is one of the safest cars for children in the rear seats in front, side and pole impact tests.
The Seat Leon also scored 94 per cent for adult safety and 70 per cent for pedestrian protection in the industry’s most respected tests.
The pedestrian safety test was bolstered by the introduction of Multi Collision Brake, a system which applies the brakes if the car detects an imminent collision.
Seat has welcomed the news for the new tech-packed Seat Leon. Managing Director Peter Wyhinny said: “A five-star safety score is yet another string to the Leon’s bow – a car whose style, quality and dynamic abilities are already making waves among motoring industry experts.”
“It’s not just having seven airbags as standard that makes the Leon so safe, but innovative technology like its Tiredness Recognition System, Lane Assist, High Beam Assist, and full LED headlamps, which offer a light that’s far closer to natural daylight than even xenon units provide.”
The new 2013 Seat Leon is a small family hatchback with a choice of Volkswagen-derived engines that will offer lower running costs than ever before.
These include 1.2-litre petrol options in 85 or 104bhp, a 1.4-litre unit in 148 and 181bhp variations and a range-topping 178bhp 1.8-litre option.
Diesel engines include two 1.6-litre and two 2.0-litre units with the most efficient delivering road tax-free emissions of 95g/km of CO2 and up to 75mpg in fuel economy.
The new Seat Leon will go on sale at Perrys Seat of Aylesbury in March 2013 from £15,670.