Car Alarms, Remote Start Kits and Key Fobs

One-way or two-way remotes, and what range really means

A one-way remote sends commands and gives you no confirmation. A two-way remote receives a reply, shown by a light, sound or screen, so you know the car locked or started. Range figures, such as a quarter mile, assume open ground; buildings and interference cut them sharply. Check which functions are included: keyless entry, remote start, a security siren, or a combination, since some kits do not include an alarm.

Interfaces, immobilizers and matching a replacement fob

Most modern keys carry a transponder chip, so a remote start kit usually needs a bypass or immobilizer module made for your vehicle. Door lock interface modules adapt a kit to the car's wiring. Manual-transmission cars need a kit and a safety procedure made for them. For replacement fobs, match the button layout, frequency and chip type for your make, model and year, using the code on the original if you have it.

Questions about Car Alarms, Remote Start Kits and Key Fobs

Can I add remote start to any car?

Many automatic cars can take a kit with the right interface module. Manual transmissions, push-button start and some immobilizer systems need specific kits, and some vehicles cannot be fitted at all. Check the vehicle list.

Will a replacement key fob program itself?

Some do through a key-turn sequence given in the vehicle manual, while others need a diagnostic tool or a locksmith. Check the listing for the programming method and for the make, model and year it supports.

What does an uncut key blade mean?

The metal blade is blank. It must be cut to match your lock before it will turn the ignition or open the door, which a locksmith or hardware counter can do from your original key or key code.