The guide aims to increase consumer awareness of their rights and issues that may arise when buying cars.

The NCA is also pursuing a number of other strategies intended to address the specific problem of car clocking, including liaison and cooperation with other enforcement agencies, prioritising the investigation of complaints of alleged car clocking made to the agency, examination of used imports and unannounced inspections of garage forecourts.

The guide gives tips on checking the condition of the car, performing background checks, payment options and legal rights when purchasing a car. It also includes a comprehensive checklist for consumers to use when buying a vehicle.

Noting that most car dealers "are completely reputable", Ann Fitzgerald, acting chief executive of the NCA, said there are some rogue operators out there.

"Any consumer purchasing a car should be armed with the information in this guide and know how to avoid being sold a lemon."

She stresses that it is an offence to mislead consumers regarding a car's usage or prior history and also warned that few people are aware that private sales are generally not covered by consumer legislation.

"Consumers cannot bring another consumer to the small claims court if something does go wrong, " she says.

"Therefore, the guide offers tips on dealing with a private seller and, as there is no obligation on a private seller to offer any information freely, the types of questions one should ask."

Copies of the booklet are available through the NCA website www. consumerconnect. ie or by contacting their helpline on 1890 432 432.