I purchased an extra set of TPM Sensors. The tech said that he thinks the sensors were made by BERU. Tesla P/N: 1010938-00-A (silver valve stem) Writing on the sensors: V02: FS15L1-120830-010152D1 (The L could be I or L. It's not 1.) E13*10R00*10R02*9986*00 FCC ID: TZSTPMS201 I haven't had the time to find out if they are BERU sensors, but if we can find the BERU part number, we could purchase them somewhere else. From tesla, they are $125/ea.