My old '87 Nissan failed the bi-annual smog test this year. The professional folks at Cam Car Care Center did an excellent job of trouble-shooting the problem and correcting it by replacing the oxygen sensor. They performed the smog check at their facility so I was assured that when I took it to the "Test Only" center I would pass smog certification. The car runs better than ever at 200,000 miles. Kudos to all people at Cam Car Care Center for their fast, professional service. The management has decided not to work their personnel on the weekends so the employees can share their off time with their families. Expect to pay a bit more for service but in this day and age it's refreshing to know that family values are supported and appreciated. You get what you pay for.