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      01-22-2018, 04:33 PM   #1
vbjr
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Exclamation Keys not working properly

Hello everyone,

I tried searching here for answers but I couldnt find anything so I hope I am not double posting.

I have a bmw x3 04 plate.
My key for the car was working just fine, e.g. unlocking the car and switching the car on.

The key now only unlocks the car but doesnt start the car.

I had to take my spare key out.

The spare key does not unlock the car, but it does switch the car on.

How can I make at least one key operate as it should to unlock and start the car?

Thanks
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      01-27-2018, 01:28 PM   #2
frisbeeguy
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Change the battery. Tischer BMW or another BMW dealer should have the battery (It's rechargeable, so you can't use a normal CR coin battery)
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      01-29-2018, 10:31 AM   #3
vbjr
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Thanks Fris,

Do you think both key's need the replacement of the battery or just the one that doesnt unlock the car?

I do still wonder why the main key doesnt start the car though.
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      01-31-2018, 09:45 PM   #4
frisbeeguy
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I think both keys need battery replacement. There could also be an RFID chip issue (since the main key only unlocks the car and doesn't start the car), but first step is battery replacement. https://www.youcanic.com/bmw/key-battery-replacement
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      03-05-2018, 09:39 PM   #5
BeemerBob71
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Mine does the same; one key unlocks, while the other starts the car. I just deal with it and is the same issue with my old E46. The batteries get old and don’t charge in the ignition anymore.
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      06-17-2019, 09:32 PM   #6
MgalSF
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any chance a top locksmith can replace the battery? I ask b/c I cannot stand the BMW dealership bought the car from (lotta dirty tricks - an AWFUL buying experience!).. and other dealerships 50+ miles away.
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      08-20-2019, 12:30 AM   #7
CharismaK
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