The final avenue should be a mediation or arbitration program. A few automakers mediate customer disputes internally, but most participate in a program that allows dissatisfied owners to seek resolution through an independent third party. These programs usually pit the consumer against the manufacturer, not against the dealer. The manufacturer's representative presents its side of the story. Then, the panel renders a decision or a recommendation.
Some findings are binding on the manufacturer.
But when a panel sides with the manufacturer's position, pursuing the complaint grows difficult for the consumer. The Council of Better Business Bureaus operates the Auto Line program, which combines mediation and arbitration on vehicles that are still covered by the manufacturer's warranty. Most claims are successfully resolved to the satisfaction of both parties in the mediation stage. Many dealers also use this service to resolve disputes that don't involve a manufacturer. You will be referred to the appropriate automaker.