Hey guys, I've had a nagging issue with my TPMS and can't seem to find a solution. The TPMS sensor defect warning light has been popping up, so I replaced all 4 sensors and had them reprogrammed. This didn't solve it. So I'm thinking it might be the TPM receiver module, but I can't seem to find a diagram of where this part is located or even a site that sells it. Any ideas? Thanks.