Can cell phones and "smart" keys co-exist?

If you've been fortunate enough to have purchased a car within the last few years or so, chances are it came with a "smart" key, which has a computer chip embedded in its plastic fob. These intelligent keys have been designed to allow keyless entry; you can enter your car (or, with some models, even start it up) without taking the key out of your pocket.

However, here's something to keep in mind. Don't keep your cell phone in the same pocket.

A statement released May 23 by Nissan North America indicated that some cell-phone models can interfere with the wireless functionality of the smart key if the phones are within an inch of the chips in the plastic fobs. Although Nissan hasn't received any complaints from customers, they will be introducing a revised I-Key that cannot be interfered with.

Presently, smart keys are offered on a variety of new makes and models, and are known by various names depending on the manufacturer. A list of some of these names include:

• Acura:
• Audi: Advanced Key
• BMW: Comfort Access
• Cadillac: Adaptive Remote Start & Keyless Access
• Infiniti: Infiniti Intelligent Key with Push Button Ignition
• Lexus: SmartAccess
• Mercedes-Benz: Keyless Go integrated into SmartKeys
• Mitsubishi Motors: FastKey
• Nissan: Intelligent Key
• Porsche: Porsche Entry & Drive System
• Toyota: Smart Key System
• Mazda: Advanced Keyless Entry & Start System
• Suzuki: SmartPass Keyless entry & starting system

The Toyota Camry is available with the advanced key as an option starting with the 2007 model year. The Nissan Versa is available with Intelligent Key as an option on the 2007 SL model.