A member of parliament has urged more independent garages to sign up to the Motor Industry Code of Practice for Service and Repair.
Gareth Thomas, consumer affairs minister, said car owners need peace of mind when booking vehicles in for check ups, especially when times are tight.
He stated: "It's particularly important during the economic downturn that consumers are reassured they're getting a good deal."
Mr Thomas claimed by signing up to the code of practice, firms up and down the UK could help provide drivers with that peace of mind.
The industry guidelines were introduced last year in a bid to make it easier for motorists to identify garages where they can feel confident about receiving excellent customer service.
Earlier this month, the group responsible for implementing the code asked drivers who have attended businesses enrolled in the scheme to provide feedback through a consumer survey available on its website.