Question about 2003 BMW Z4

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Need to replace the battery in the car key.

How do you replace the battery in the bmw car key?

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If it's like my 2006 Z4 key you don't replace the battery. It has an internal rechargeable battery that charges when the key is in the ignition. Not sure how to replace the battery if it won't charge.

Posted on May 20, 2009

  • Michael Williams
    Michael Williams Sep 09, 2015

    My key has been misplaced and my spare won't start my car. I thought that it was just a bad key, but now that you're mentioning the key battery I'm starting to wonder if that's what is wrong. Do you like I should get it inspected, or should I just have a new key made? http://www.lostkeystx.com/services

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Posted on Jan 02, 2017

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4 Answers

I have a 2001BMW X5 and my key functions don't work dose it need a battery and do I need togo to BMW and how much will it cost?


Yes, most likely you need a battery in the key fob. No, you don't need to go to the dealer. Most any parts place will have the battery, and should even help you install it.

Oct 24, 2014 | BMW X5 Series Cars & Trucks

1 Answer

When I put my key fob in the ignition the battery low key light comes on and I,m having problems with locking and the windows keep dropping down


You need to replace the battery in the Key. You can usually just pull the top cover off the key and replace the battery but BMW ahs many different versions of the key. Here are instructions on how to replace the key on some models: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDkQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DE16zXeJxqC8&ei=1m_SUIaDBcmQiALD-YHIDA&usg=AFQjCNFeWIWRfZ570wStMjQPqQapz8OW_A&bvm=bv.1355534169,d.cGE

Dec 19, 2012 | BMW Cars & Trucks

1 Answer

Where can i find the battery for the key in a 2001 bmw 325ci, i want to replace it myself just need to find the battery not found in any store whatsoever


Hi these do not have a battery that you replace, the battery is charged when the key is in the ignitionso the more you use it the more it charges thats why when you have more than one of these keyes you are supposed to alternate there useagge to give each an equal share of charging, if your key is not working it might just need a re-program hope this helps

May 22, 2011 | 2001 BMW 325

1 Answer

My bmw 320d remote wont lock car however does lock the car with the key its a 55 reg


1
Programming
When
Key batteries completely discharged. Key batteries not replaced within 60 seconds. Key added or replaced. DO NOT press remote control buttons during battery replacement.
How
Unlock vehicle. Enter vehicle. Close driver's door. Switch ignition ON and OFF. Remove ignition key. Press and hold unlock button Fig. 1 [1]. Press lock button Fig. 1 [2] briefly 3 times within 10 seconds keeping unlock button [1] depressed. Release unlock button Fig. 1 [1]. Some models: LED Fig. 1 [3] flashes slowly for 10 seconds. Some models: Central locking system locks and unlocks rapidly to indicate correct programming. Some models: Repeat above procedure if central locking system does not work and LED does not flash or LED flashes continuously
Later keys with bmw badge on key. Battery can not be replaced
Battery in key charges while driving

Dec 22, 2010 | BMW 3 Series Cars & Trucks

1 Answer

How much do bmw charge to replace a key fob battery


At BMW dealer ship they charge near to $100 plus service charge.But if its the only problem of battery in your key-fob then get it replaced by local car garage ,they will do it at very less cost.The cost of key-fob battery is not very much.You can get batteries at local car part store or at auto-zone service center. ------- thanks.

Nov 14, 2010 | BMW 318 Cars & Trucks

1 Answer

BMW 530i key no longer works for remote access to car.. Is their a battery in key to replace?


My 740 key fob has a rubber backing that when removed shows the screws have need to be removed to get to the battery.

Sep 03, 2010 | 2001 BMW 5 Series

1 Answer

My battery is running dead every two days! I jump it and starts up, after several minutes with the jumper pack cables! This has happened 4 to 5 times since I purchased the vehicle just 2 weeks ago...Am I...


If the key is in off position it won't drain battery.
You may have battery draw in that vehicle , or the battery itself is going out.(BMW batteries are good for 4-5 years)
Both cases needs to be checked by workshop , cause BMW very sensetive to the voltage drop. When you disconnect battery you may need to perform some settings adaptation after you replace it or connect it back.
New BMW requared to reset computer even after brake job and battery replacement.

Jun 15, 2010 | 2006 BMW 750Li

2 Answers

The doors do not open by remote control key(BMW 740il 1996 model)


Programming
When
Key batteries completely discharged. Key batteries not replaced within 60 seconds. Key added or replaced. DO NOT press remote control buttons during battery replacement.
How
Unlock vehicle. Enter vehicle. Close driver's door. Switch ignition ON and OFF. Remove ignition key. Press and hold unlock button Fig. 1 [1]. Press lock button Fig. 1 [2] briefly 3 times within 10 seconds keeping unlock button [1] depressed. Release unlock button Fig. 1 [1]. Some models: LED Fig. 1 [3] flashes slowly for 10 seconds. Some models: Central locking system locks and unlocks rapidly to indicate correct programming. Some models: Repeat above procedure if central locking system does not work and LED does not flash or LED flashes continuously

To change batteries remove panel back of key then screws on plastic bar
Batteries are available from your local motor factor shop
You might not need new batteries try re programing as described above

Apr 24, 2010 | 1998 BMW 7 Series

1 Answer

Key not working


That is FALSE. The radio has nothing to do with charging the keys battery. Some key batterys can be replace others get recharge through the key holder. Your Im pretty sure it can be replace, if not then more than likely you need a new battery or a new key. They are common to fail after several years.

May 08, 2009 | 2002 BMW 3 Series

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