Are key batteries rechargeable?

J

jamesgarbett

Active member
 South Manchester
The 2nd key that was supplied with my Z doesn't unlock the car remotely

Am I right in thinking it needs some time in the ignition to recharge its battery?
 
jamesgarbett said:
The 2nd key that was supplied with my Z doesn't unlock the car remotely

Am I right in thinking it needs some time in the ignition to recharge its battery?
Click to expand...
I believe that's what it says in the manual.
Drive with it for a while and see what happens!
 
That's what happened to one of mine.

had to reprogram it once it had some charge but after that all fine again :D

I kept both in a drawer after that and randomly picked a key...
 
Thanks I did try it on a short run of a few miles but no joy - maybe it needs longer to recharge from flat?
 
I little longer, but you will probably have to re-program the key to the car to recognise the remote... Fairly simple procedure around here somewhere...
 
BMW Z4 - Key Remote Programming

Three methods to try:

Method 1:

1. Working from within the vehicle and with the doors shut

2. Turn ignition to position 1 and back to off within 5 seconds.

3. Remove the key from ignition and press and hold the unlock button for 15 seconds during this time press the key lock button 3 times within 5 seconds.

4. Release both buttons.

5. Doors will lock and unlock to show correct programming has occurred.



Method 2:

To do this procedure you need to have one working key and one key that needs to be programmed.

1) Get in and close all doors.

2) Turn on the ignition and turn off quickly. (No more than 5 seconds) to start the process. Next action must take place within 30 seconds.

3) Remove the 1st key.

4) Hold the key up near your left shoulder (this is so it is closer to the remote receiver antenna.

5) Hold down the unlock button and press the lock button 3 times. Release the unlock button and the doors lock which confirms the operation.

6) Quickly repeat steps 4 & 5 for key #2 etc.

If it does not work, try doing the keys in opposite order. Key 2 then key 1, vs 1 then 2.



Method 3:

Alternate if you do not have a working remote

1. Turn key to position 1 five times very quickly 2. Remove key 3. Hold unlock button then press lock button 3 times, release unlock button.

4. If you have another key do the same button pressing within 30 seconds 5. Turn on ignition to finalise.

PLEASE NOTE: This programming procedure programs the remote control part of the key. Any transponder chip for the immobiliser (starting of car) will not be programmed and must be done by a specialist.
 
jamesgarbett said:
The 2nd key that was supplied with my Z doesn't unlock the car remotely

Am I right in thinking it needs some time in the ignition to recharge its battery?
Click to expand...

My "second" key was dead on purchase too. As others say it probably needs to be reprogrammed (youll need to do both keys) which is a no-brainer.

To charge it up out of the car, put it onto an electric toothbrush base (seriously) overnight or over the weekend. Any of the ones that work by induction (ie you put the brush on a plastic spigot with no visible contacts) will work. If youre not needing the car, charge both keys and then do the re-programming.

BTW - I used re-programming method 1) above. Works fine, but remember you need to do both keys and dont put either key back in the iginition between codings or youll end up with one working and one not. One key in the ignition, press the buttons on one key, door locks/unlocks, press the buttons on the other key, door locks/unlocks, all done.
 
pog451 said:
jamesgarbett said:
The 2nd key that was supplied with my Z doesn't unlock the car remotely

Am I right in thinking it needs some time in the ignition to recharge its battery?
Click to expand...

My "second" key was dead on purchase too. As others say it probably needs to be reprogrammed (youll need to do both keys) which is a no-brainer.

To charge it up out of the car, put it onto an electric toothbrush base (seriously) overnight or over the weekend. Any of the ones that work by induction (ie you put the brush on a plastic spigot with no visible contacts) will work. If youre not needing the car, charge both keys and then do the re-programming.
Click to expand...

Tip of the Month or what? Nice one!

To anyone who wasn't aware; yes key is self charging but only while in ignition and in use, so alternate them, especially if you don't use the car much.

I'd better go and get an electric toothbrush now I suppose :thumbsup:
 
a11y said:
gannet said:
I kept both in a drawer after that and randomly picked a key...
Click to expand...
Better than keeping them in a bowl and randomly picking a key.........
Click to expand...
keys.jpg

We just couldn't wait to empty out the Olive stones.
 
Who's going to be first to appear at a meet with a big bowl and get a photo of even more Z4 keys than that... :oops:
 
thefmister said:
BMW Z4 - Key Remote Programming

Three methods to try:

Method 1:

1. Working from within the vehicle and with the doors shut

2. Turn ignition to position 1 and back to off within 5 seconds.

3. Remove the key from ignition and press and hold the unlock button for 15 seconds during this time press the key lock button 3 times within 5 seconds.

4. Release both buttons.

5. Doors will lock and unlock to show correct programming has occurred.



Method 2:

To do this procedure you need to have one working key and one key that needs to be programmed.

1) Get in and close all doors.

2) Turn on the ignition and turn off quickly. (No more than 5 seconds) to start the process. Next action must take place within 30 seconds.

3) Remove the 1st key.

4) Hold the key up near your left shoulder (this is so it is closer to the remote receiver antenna.

5) Hold down the unlock button and press the lock button 3 times. Release the unlock button and the doors lock which confirms the operation.

6) Quickly repeat steps 4 & 5 for key #2 etc.

If it does not work, try doing the keys in opposite order. Key 2 then key 1, vs 1 then 2.



Method 3:

Alternate if you do not have a working remote

1. Turn key to position 1 five times very quickly 2. Remove key 3. Hold unlock button then press lock button 3 times, release unlock button.

4. If you have another key do the same button pressing within 30 seconds 5. Turn on ignition to finalise.

PLEASE NOTE: This programming procedure programs the remote control part of the key. Any transponder chip for the immobiliser (starting of car) will not be programmed and must be done by a specialist.
Click to expand...

Method 1 worked for me, thank you so much!
 
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