Differences Between BMW 3 Series Smart Key and Regular Key

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The difference between the BMW 3 Series regular remote key and smart remote key lies in their functions: the regular remote key functions include locking/unlocking doors and activating the anti-theft alarm; the smart remote key features keyless entry function, automatic window closing, and security setting function. Types of car keys: mechanical key, remote key, touchscreen LCD key, and smart wristband key. Precautions for using car keys: 1. Do not place them together with electronic devices; 2. Avoid exposing the key to direct high-temperature environments; 3. Do not use batteries with different power levels. The method for replacing the key battery is: 1. Take out the car key; 2. Insert a flat-head screwdriver into the gap on the side of the key to open the key cover; 3. Remove and replace the battery.