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Automobile Enthusiasts

Best_man23

(5,191 posts)

8. Start by replacing the battery

Reply to no_hypocrisy (Original post)

Wed Dec 6, 2023, 07:59 AM

Dec 2023

As others have said, make sure you properly insert the new battery. If you still cannot unlock/lock the doors or open the trunk, you may need a new key fob.

If the battery replacement works, be sure to replace the batteries in any other key fobs for that vehicle.

If you have to replace the key fob, there are plenty of aftermarket key fobs, but I recommend going with an OEM. On most vehicles, programming is relatively easy (Google the year, make and model of the car and you might find the actual procedure). Make sure you do keep the old key fob; if it was originally programmed to the car when new, you may need this key fob to program others in the future (Ford key fobs work like this).

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Question about my key fob. [View all] no_hypocrisy Dec 2023 OP

Most likely and least costly way to start. Typically, them have coin type of batteries that should be easy to replace. OAITW r.2.0 Dec 2023 #1

Sounds like the battery. They should be simple but Mazda's are ridiculously hard to replace. spooky3 Dec 2023 #2

My 2007 VW came with a Fob as the ignition key. OAITW r.2.0 Dec 2023 #4

Thanks! no_hypocrisy Dec 2023 #3

Iy you replace the battery, make sure it goes in with the "+" mark in same orientation as the one you take out. OAITW r.2.0 Dec 2023 #5

Battery shops generally have replacements and cachukis Dec 2023 #6

All the above advice is good unless... 2naSalit Dec 2023 #7

All batteries can only be recharged so many times KS Toronado Dec 2023 #9

To be honest... 2naSalit Dec 2023 #10

My 530i key battery went dead on me k55f5r Jan 2024 #12

Thanks... 2naSalit Jan 2024 #13

Start by replacing the battery Best_man23 Dec 2023 #8

Some fobs you can disassemble and replace the battery. That will also show if there are any broken parts. Kennah Dec 2023 #11

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