Additional/Replacement Key Fob for Remote Engine Start. Up to 3 total remotes can be programmed to the Remote Start system. Get to your warm, or cool, happy place even faster with Mazdas Remote Engine Start. From the field to the parking lot, or up to 300 feet, it lets you pre-heat or pre-cool your cars interior, start the rear defroster or even help locate your Mazda. Add the convenience of remote controlled starting to your vehicle. It allows you to pre-heat or pre-cool the vehicles interior from up to 300 feet away. It also prevents vehicle from starting if the hood is open or if key is in the ignition.