Once again the doors should lock and unlock. Take the BMW key fob you wish to program and hold down the unlock button while pressing the BMW logo 3 times before releasing the unlock button. How long should a BMW key battery last?īMW key fob batteries need replacement every 3-5 years depending on usage. If you have a smart key or comfort access BMW key fob, you’ll need to replace the battery by following these quick steps: Purchase a CR2032 battery from an auto shop or department store. How much does it cost to replace BMW key fob battery? However, you can still access and start your car manually. Will a BMW start with a dead key fob? If your BMW key fob’s battery has run out, you won’t be able to unlock your vehicle remotely or, if your BMW has Comfort Access, use keyless entry. How do you start a BMW when key fob dies? Remove the key from ignition and press and hold the unlock button for 15 seconds during this time press the key lock button 3 times within 5 seconds.Turn ignition to position 1 and back to off within 5 seconds.Working from within the vehicle and with the doors shut.How do you start a 2008 BMW without the key fob? If the owner’s manual is not handy, you can always check your current key fob. You can find the exact type in the owner’s manual. Most car keys take CR2032 and CR2025 3-Volt batteries, but that doesn’t mean they fit every key fob. ![]() Does it matter what battery I put in my key fob? However, if you’ve replaced not just the batteries but also some of the internal wiring and electronics, you may need to reprogram it by pairing it with your vehicle once again. Typically, you do not need to reprogram the key fob after changing the battery. ![]() If you have additional keys you want to program, repeat step 3 within 30 seconds from the original key programming.ĭo I have to reprogram my key fob if I change the battery? Hold the unlock button and press the BMW logo 3 times, then release the unlock button. Use the key to turn the car’s ignition to position 1 and back 5 times quickly. How do I reprogram my BMW key after replacing the battery? Remove the dead battery and replace it with a new one. ![]() Use the valet key or a flat screwdriver to remove the key battery cover. Can you change the battery in a 2008 BMW key fob?Īfter the valet key is removed, you will notice a small access port on the key fob. Here’s how to replace the battery from your BMW key fob: Press in the small tab on the side of your key fob, and remove the metal valet key. 24 Can BMW keys BMW key be reprogrammed? What kind of battery does BMW key fob take?įor drivers with BMW Comfort Access, BMW key fob battery replacement will require a CR2032 battery.
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