MOT advisories are found in 1 in 4 cars after checks, and leaving the forecourt, according to data from Protyre.
Of the hundreds of thousands of small business vehicles protected by the RAC, 31% are expected to suffer a breakdown this year.
The RAC has developed and launched a new type of trailer that provides flatbed recovery capability to its breakdown patrol vans.
RAC patrols dealt with 1,714 breakdowns in the last three months of 2018 that were more than likely caused by potholes or poor road surfaces.
Breakdowns caused by pothole damage rose by 63% in the first quarter of 2017, according to the RAC.
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