RE: TPMS sensor alert.
These things work wirelessly, right? Can they receive signals from other people's cars? I mean, in traffic your receiver can be closer to a neighboring car's tire than it is to your own rear tires if the receiver is positioned under the dash. Or, are they keyed specifically to the transmitters in just your car. That seems unlikely though with the limited number of frequencies available. All moot if the system isn't wireless, though.