Mae gwaith ymchwil yn dangos bod bron hanner yr holl achosion o gerbydau’n torri i lawr wedi’u hachosi gan broblemau mecanyddol y gellid eu hosgoi drwy wneud gwiriadau syml. Mae bron chwarter o’r achosion yn ymwneud â phroblemau gyda theiars.
Research shows almost half of all breakdowns are caused by mechanical problems which could be avoided with simple checks - with nearly a quarter caused by tyre problems.