Safety campaigners warn scrapping EU rules could water down seatbelt law and cost thousands of lives.
Rishi Sunak plans to rip up remaining EU laws by the end of the year left on the statute book after Brexit.
But the Royal Society for the Prevention of Accidents worries that any relaxation in seatbelt rules will discourage people from wearing them when use is already at an all time low despite fines of up to £500.