The Suzuki Ignis, Ssanyong Tivoli and Ssangyong XLV have all scored lowly three-star ratings in the latest round of Euro NCAP safety tests.
Fewer than 15 UK models have rated so poorly since the start of 2014.
Their low scores follow on from that of the Fiat Tipo, which was awarded three out of five stars at the end of October.
However, both Ssanyongs achieve more respectable four-star safety ratings when fitted with optional safety packs, while the Ignis gains the full five stars when the safety pack is chosen by buyers.
Thatcham Research, the representative of Euro NCAP in the UK, continued its call for vehicle makers to fit safety equipment, like autonomous emergency braking systems, as standard rather than as optional extras.
But cccording to the insurance industry’s research body, there is a take up of less than 3% for optional safety packs, meaning the majority of Ignis, Tivoli and XLVs on UK roads will be three-star cars.
Its research suggested the fitment of safety features such as AEB reduces rear-end collisions by up to 38%.
“We’re increasingly seeing car makers opt for a Euro NCAP Dual Rating – a score for the standard car, and then a second rating with the optional safety pack. Car buyers need to make sure that they understand this rating and speak with their dealership to spec their cars carefully,” said Matthew Avery, Thatcham Research’s director of research. “Don’t be misled – do your research, as it’s only by choosing the optional safety packs that you will be getting the levels of safety you should expect.”