Bypass Essentials modules work with your vehicle's anti-theft system to incorporate the convenience, security and luxury features of your Python alarm system.

Universal bypass modules work with any vehicle using an "immobilizer" key system, allowing you to remote start your car without disrupting factory-installed anti-theft features.

Use the 556U universal bypass in vehicles equipped with a transponder or RF-based immobilizer, such as those found in many late-model GM vehicles. The compact module is tunable for European or domestic vehicles and features tamper-resistant circuitry.

Important Note: One of your car's transponder keys will be permanently installed in the 556U module. You can buy an extra key through your dealer and have it programmed to work with your car's immobilizer. Ask your dealer if keys can be programmed individually — some vehicle manufacturers require that all keys be reprogrammed at one time.