A research found that millions of drivers are putting themselves at risk by attempting to repair their vehicles themselves on the roadside.
A study, conducted on behalf of Britannia Rescue, found that seven million drivers have attempted a DIY rescue or relied on friends, family or even strangers to help them on the roadside in the past five years.
The report revealed that a quarter of those who called on unofficial rescuers for help had to be towed by friends and family, with young drivers relying heavily on their parents for assistance, the report said.
Motorists are also relying on DIY breakdown measures when driving abroad.
A spokesman said that more than 297,000 drivers have broken down overseas in the past five years and called on non-official rescue services for help.
Peter Horton, Britannia Rescue managing director, said: "Relying on friends, family and strangers to provide an unofficial breakdown service is risky, costly and even illegal in some cases."
He added: "We would encourage motorists to take the long-term view when considering their options for breakdown cover."