Description: The Ford Perimeter Plus Vehicle Security System (ML3Z-19A361-A) is a factory-designed alarm and remote start system for 2022–2025 Ford vehicles. It uses your factory key fobs to arm and disarm, and a 2-stage shock sensor determines whether to issue a warning chirp or full alarm based on impact severity. Parking lights stay on during remote start so you can confirm the engine is running from up to 300 feet away. A genuine Ford OEM security accessory activated by your dealer.