Re-code e36 alarm fob- lost keys

[Venom]

Hi Lads,

I've somehow lost the keys to my e36 318is. I have a back-up but the battery died in the separate remote fob and the immobilizer is now on and cant drive the car.

Anyone know where I can get new battery for fob and get it re-programmed for the car?

If the fob is for the car would you not just need the battery?

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