Do you have any links to reports of OEM TPMS interfering with aftermarket TPMS? There are number of things that can temporarily interfere with either one, but I'm not aware of it being a significant issue among RV'ers. Each car company uses its own TPM setup, using differing frequencies and codes, sometimes even differing from model to model. Some do not even use individual tire sensors, instead using RPM variations detected by the ABS and other OBD input to identify a low tire. With all of that variation, making a monitor that's capable of working with all, or even most, of them, would be a major challenge.