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What is the middle button on a car key for?

1 Answers

VonCarter

07/30/25 5:55am

The middle button on a car key is for opening the trunk. A typical car key usually has three buttons: unlock, lock, and open trunk. Here's an extended introduction to their functions: 1. Unlock button: This button should be very familiar - pressing it once will open the car doors. There's a hidden feature: pressing the unlock button once only opens the driver's door; pressing it twice unlocks all four doors; holding the unlock button for several seconds will simultaneously open all four windows. On some models, the sunroof will also open. 2. Lock button: Pressing this will lock all four doors. It also has a hidden function - remote window closing. 3. Trunk release button: Holding this button (or pressing twice for some models) will automatically open the trunk. Some vehicles even feature a hands-free trunk opening system where making a kicking motion under the rear bumper (while the key is within range) will automatically open the trunk.

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