Worn tyres were chief among the problems witnessed by police during a recent clamp down on taxis in the Scarborough region.
A total of 28 taxi vehicles were checked as part of the operation, with just 12 given a clean bill of health to continue operating.
Police teamed up with members of Scarborough Council to conduct the examinations, with drivers' licenses also put under close scrutiny to ensure they fell in line with government legislation.
Speaking to the Yorkshire Post, councillor Brian Watson said: “It’s always disappointing when any vehicles are identified with defects.
“While we still witnessed some unacceptable defects, the persons responsible will have been dealt with accordingly," he said.
The move follows a similar clampdown in Suffolk, with police urging drivers to ensure MOT certificates were up to date.
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