Brand new, never installed factory RES Remote Engine Start kit for a 2011 to 2015 RX350 and RX450h for $150. The Lexus description as follows:
Equally valuable on cold winter mornings and hot summer afternoons, the remote engine starter allows you to start the engine as well as activate your air conditioner, heater and windshield defogger before entering your RX. Simply pre-set your climate control settings and your RX will be ready and waiting with a comfortable interior temperature. The remote engine starter is also fully integrated into your keyless entry system, so there's no need for an additional remote. Part number PT398-48112, with a Mr. Lexus list price of $243 plus sales tax.
If the ad is up, it'savailable, so inquiries asking "if available" and or without a phone number will be ignored. I don't text, and have limited time for emails so they won't get answered without a contact number. So, a phone call is best for a prompt and accurate response. John at 53ZERO-477-71FIVE8