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Full Version: E 46 ignition key battery
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What battery does the E46 ignition key use? I don't feel like stripping the key first to check.
If it's original then it uses a rechargeable battery that is soldered onto the board. There are replacement units that can be soldered onto the board or you could purchase an aftermarket key that uses a replaceable battery.
Thanks Kyle, I'm aware of all of that, but don't know the code of the battery
It’s LIR 2025
i replaced mine the other day , took about 30 minutes of messin around to separate the fob, replaced the battery and done works like a charm (i replaced my battery with a CR2016)
(19-10-2020, 08:02 AM)DonovanPorter Wrote: [ -> ]i replaced mine the other day , took about 30 minutes of messin around to separate the fob, replaced the battery and done works like a charm (i replaced my battery with a CR2016)

Is this an oem key or aftermarket replacement key?
OEM key

in my opinion i doubt the original batteries charge
CR 2016, thank you, that's the info I wanted.
cool.
Let us know how it goes, CR2016, has no pins that has to be soldered... if you open it up and you find the battery has pins... then it is LIR2025.
For reference this is my key fob.
2004 318i Touring E46

[attachment=2546]
[attachment=2547]
Just changed the battery, but the key had a CR 2026 battery, a bit thicker than the CR 2016.
does it work correctly ?
Yes, but I'll fit the correct battery asap.
great
Been using the same keys for my 2003 with no issues. I just swop them out every 3 months.