How to cut program and repair bmw keys that battery and they end up damaging the circuit board inside thats what happened to me and i ended up having to buy a new key from the bmw dealer. In this video you will see a step by step demonstration on how to open a bmw key fob and do a bmw key battery replacement all of the years and models below have the same style comfort access key fob. For all bmw 3 series vehicles a bmw e46 key can be purchased as a spare find a large inventory on ebay each key needs to be programmed before it functions and syncs with its respective bmw vehicles to program the bmw e46 key get in your car and place the key in the ignition turn the key to the on and off position quickly five times. Diy instructions on how to change bmw key battery on any bimmer remote replace dead key battery 1 3 5 6 7 series x5 m z4 x1 x3 x4 x6 do not cut to deep into the case or you risk damaging the circuit board once the key fob is exposed you will notice the battery soldered to the circuit board use a soldering iron to remove the battery. The bmw gods have spoken and thankfully we do have a solution for you as bmw key orders are our specialty to get your new bmw key simply select your bmw in your vehicle selector and type key into the search somewhere on that page find the key that looks like the broken one you want to replace and buy it
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