Drivers could face extra bills because of proposed changes to the current annual MOT check rules, according to campaign group Pro-Mote.
The revelation comes as the government considers the introduction of biannual MOT checks in the UK.
According to officials, having an MOT check every two years, instead of one, could mean they save around £24 a year by avoiding the costs of the test.
However, a report put together by ProMote counters this argument by noting that drivers would incur extra repair bills of £81 a year on average.
The A Cost Too Far report was put together following research by the Pro-Mote group, which comprises a number of motoring organisations, safety groups and retailers.
The report was sent to MPs on Monday (January 9th), with The Telegraph also gaining extracts from the study, which were published this week.
"We support a review of the MOT regime to improve safety but oppose any move to reduce the frequency of tests," an extract read.
The report goes on to argue that these changes would make "roads more dangerous, prove more expensive for drivers and has been shown to be unwanted by drivers themselves".