Last week, I took my Jeep Patriot for noise and possible exhaust leak to a muffler shop in the Fruitvale area. I left the car for a few hours and then I was told that the catalytic converter needs to be replaced and it would cost me $2,000. When I took it to Costa, they kept it for a few hours and when they drove it 3 times, they couldn't find anything wrong with it and charged me nothing. Very honest, nice and professional people.