Remote key working intermittently

[andrewwynn]

Originally Posted by Henn28

I just need to do the same thing, buy new keys from BMW.

Thanks for this entire thread as I’ve been following it closely. Very occasionally my key will fail to work at all, however after I unlock the door manually with it, the thing starts working again. Sounds like the eBay/Amazon stuff isn’t worth the time for this.

This was my exact symptom that led to me doing a reflow on my two keys.

If I locked or unlocked with the key blade the fob would immediately work for a few presses lock/unlock.

I could also get it to work after a battery jump start making me think it was possibly worn battery but after opening up and measuring battery = good I reflowed most of the solder joints and both keys syncd after that and worked for over a year