CAR dealership garage charges for repairs and parts can be more than double independents’ prices.
VW, Renault, Nissan, Audi, Land Rover, Mercedes-Benz and BMW Mini ask on average 45 per cent more.
Halfords revealed the differences in a mystery shopper exercise and has launched a Dealer or No Dealer campaign for drivers.
It aims to raise awareness that cheaper repairs with manufacturer verified parts that do not impact warranties are available.
Boss Graham Stapleton said: “Drivers have a misconception that unless they go to a car dealership, their warranties are void.