Welcome to the forume. You'll need 433 mhz sensors for your 07. Check your build date though, as I am not sure when they made the switch. An 07 built in 06 may??? still have the 315 mhz ones. The absolute best way to verify though is to put a TPMS Service Tool on one wheel and see what frequency it actually is. The 315 mhz were only used in 05 and 06. My 05 Magnum R/T (built July 04) didn't even come with a TPMS (system became mandatory in 06), but I have since installed sensors in the wheels and use my TPMS Service Tool to check tire pressures. This way I never have to stick a gauge on any of the wheels and it makes adding/removing air to the correct pressures a whole bunch easier.

 

I've got a quandry. 2006 300C, after deciding not replacing parts to find the problem I bought a TPMS tool. Went out today and spent an hour trying to get a read from all 4 tires. Went back through the menu and changed from 300C 433 mhz to 300 w/ 315 mhz and it picked stats in 2 seconds. My tool and people here say 433 but they're reading 315. Used the tool to load stats through ODBII. Now pressures and positions are correct on dash but still get check tpms at about 7 miles.

 

I believe you'll now find that you need to compare the Sensor ID's for each wheel position against the ID's programmed into the Wireless Control Module (WCM). If the ID numbers don't match, you'll get the message you're getting, but everything will work correctly. Some of the early ones would update this data correctly and some won't update it at all. My 06 Jeep won't update and when I changed sensors I had to upload the new numbers into the WCM. Some TPMS tools can program the WCM with the new numbers but, if it won't you'll need a scan too that has this capability.