Abstract: A vehicular problem diagnosis agency enrolling a number of vehicular repair shops receives communications from owner/operators of vehicles needing repair to do any and all of (1) diagnose the problem(s) with their vehicles, (2) provide a cost estimation as to what the vehicle repair(s) will cost, and (3) make a referral to an enrolled repair shop capable to perform the necessary repair(s). A mobile problem diagnosis service representative (“MDSR”) travels to the vehicle and provides the vehicle owner/operator with services (1) through (3), normally at a modest fixed fee. If the vehicle owner/operator actually has the vehicle repaired at an enrolled and referred repair shop then the repair shop pays a referral fee, most normally as a percentage of all services actually performed for the vehicle owner/operator, to the agency.