How to Replace the A6 Key Battery?

3 Answers
DelMalia
07/29/25 1:00pm
First, remove the mechanical key, then use a rigid pry tool to gently open the key casing along the seam, allowing access to replace the battery. Here are some relevant details: 1. The battery inside the remote key typically lasts 2 to 3 years. Once the battery is depleted, it should be replaced immediately to avoid inconveniencing the vehicle owner. 2. Some vehicles come equipped with a keyless start system. For these cars, the owner only needs to carry the remote key inside the vehicle, enabling the car to detect the key. At this point, pressing the start button while depressing the brake pedal will start the engine. 3. Vehicles with keyless start have a designated area inside the car specifically for key detection. If the remote key battery is dead, placing the key in this detection area allows the car to still recognize the key, enabling the owner to start the engine.
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McPhoebe
08/14/25 2:09am
Changing the A6 key battery is quite easy, and I often help friends with it. First, locate the small button on the side of the key, press it to pull out the mechanical key blade. Then, use this key blade as a pry tool, gently insert it into the gap of the casing and give it a slight twist to separate the shell. The battery compartment is next to the circuit board, using a coin cell battery, model CR2032. Pay attention to the battery orientation—the side with the '+' sign should face up, don't install it backward. After inserting the new battery, align the casing and press it back until you hear a click, indicating it's securely fastened. Finally, reinsert the mechanical key blade. The whole process takes just a few minutes. Remember to buy Panasonic or Sony batteries for better durability—they're available at supermarkets.
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DiAriana
10/09/25 7:10am
Just replaced the battery in my dad's A6 key fob last week. All you need is a new CR2032 battery and a nail file. After pulling out the mechanical key, use its metal tip to insert into the seam of the casing and gently pry it open to reveal the battery. Use your fingernail to pop out the old battery, and when inserting the new one, make sure the positive side faces up before pressing it lightly into place. Then align the two halves of the casing and press them firmly together—don’t forget to reinsert the mechanical key afterward. The whole process is straightforward; just avoid forcing the casing open to prevent breaking the clips. I recommend checking the battery annually to avoid the hassle of sudden power failure.
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