Does anyone have any tricks for replacing the driver side, before the cat, A/F (O2) sensor? I can get the cable disconnected (with some difficulty) and I can get a box wrench on it but I don't have any room to move the wrench. I've tried to get at it from both above and below and same issue, something in the way (brake lines, exhaust pipe) that doesn't allow any room to move the wrench. Thanks in advance for any suggestions!