I have an RTL-SDR rig with the stock tiny omni antenna in a second story of a building adjacent a public parking lot. I'm using rtl433 and I am able to reliably pick up TPMS from the lot. I've never done any testing to see what the metes and bounds of my reception are, but it's definitely not touching the tire. My rig is at least 30 feet away from the closest parking spot.