My car's check engine light came on, and I was told the code was for the catalytic converter. Having already had the converter replaced before at stuart rolfe, I went to see if it was still under warranty (they carry five year warranties). I was told that it was indeed still under warranty. I dropped my car off, and when I went to pick it up during my lunch break, they said that they did nothing, because there was nothing wrong. Before I could get back to work, the check engine light was on again showing the same code. I dropped my car off again. This time they replaced the converter, but told me that it was actually out of warranty because of the miles (convenient), so I had to pay for it. Before I could get home, the check engine light was on again, showing the same code. I called the shop, and they explained that it could be the rest O2 censor, and that it was probably that, the whole time. He told me that when they inspected my old converter, it was still good. Then why would you charge me to replace it, and not figure out what the problem actually is!!! Now I'm going somewhere else to get the O2 censor fixed. I don't trust these guys at all.