This just goes to show you how easy it is to get incorrect information over the internet when people, me in this case, post things based on a what they think without doing any real research. It is actually VW Audi group part number 5Q0 907 543 - cabin interior temperature sensor ( my guess is that the manufacturer is Valeo ). In VW Audi cars it is part of the HVAC module and is probably part of HVAC module in your car as well. This also makes sense since you found it while replacing the cabin air filter. I think the Tesla part number is probably 1494715-00-C based on my attempt to decipher the tesla parts catalog. The Tesla catalog reminds me of parts catalogs for German cars of the 50s and 60s which often had only a slight resemblance to your car since the parts in your car were whatever purchasing bought that week - so much fun. None the less if your climate control is working properly keep it as a souvenir.