Turn the ignition to position 1 and then turn it back off within five seconds. Remove the key from the ignition swich. Press and hold the “Unlock” button. Press the “Key lock” button three times within five seconds. Release both buttons. If the reprogramming has been successful the car doors will lock and unlock again.
I am betting you disconnected the cable by accident. Make sure all wires are plugged into the terminal/ on the side of the terminal. and yes you should have the dme informed of the new battery being installed, worst case if you don't the veh will burn out that battery prematurely. 07 E70 X5 3.0si. 07 E92 335i N54 ZSP.
Resetting Adaptations. Turn the vehicle's ignition on but do not start the car by pressing the start button twice. Plug in the K+DCAN adapter to the vehicle and laptop. Now, execute INPA. When INPA is loaded, the battery and ignition bubbles should be filled in to indicate it has established communication with the vehicle. To replace the tail light bulbs on the tailgate/trunk on the BMW e91, first you need to remove the interior cover of the tailgate. Using a flathead screwdriver , press on the 3 clips and remove the cover. Remove the isolant protection cover. Press on the bulb holder clip and remove it.
Battery with a key warning light. When i start my car i get a battery with a key warning light. Im guessing its to do with the battery in the remote as i have the model where it is plugged in and recharges it’s self. Will the car suddenly not start one day or can i keep driving it and ignore the light. Yes it is telling you the remote battery
Drives: BMW 335i Coupe. Join Date: Mar 2008. Location: Cincinnati, OH. iTrader: ( 1) Key FOB low battery warning. My car keeps telling me that they Key FOB's battery is low but I've replaced it with a new battery (twice now to see if it would make a difference) and it still says the same thing.

1PCS VL2020 Battery Fits for bmw key fob. but pls make sure your battery size before you order it ; VL2020 3V 2.0mm*20.0mm / 20mAh ,90° Angle ; This is a replacement part to match the original in form and function ; Notice:Pls make sure your battery size( VL2020) before you order it. Easy installation which does not require reprogramming

See how to replace the battery in your BMW Fifth Generation E90, E91, & E93 #key #fob keyless entry #remote . Buy An Fifth Generation BMW Key Fob Here:
The BMW 7 Series key fob uses the CR2032 battery like most other car models. The CR2032 battery is a lithium-oxide battery that is coin or button-shaped. It has a diameter of 20mm and a thickness of 3.2 mm. It has a voltage of 3.0 volts. It is a primary non-rechargeable battery that has a typical weight of 3.0 grams.
Step 2: Open the fob. Using a small screwdriver or another flat object, insert it into the little slot that the key fits into and pop open the fob. Step 3: Remove the green circuit board. Carefully remove the circuit board from the fob, being sure not to damage any of the components. Step 4: Replace the battery.
The battery in the key is only there for the remote key functions (lock, unlock the car, roll the windows down, pop open the trunk & the panic alarm set off). Sometimes when the key is opened up, the tiny EWS chip will fall out & without that, the key will not start the car. Without the EWS chip, the key can not talk to the EWS module & tell .
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    • bmw e91 key battery replacement