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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 04-06-2008, 05:29 PM
BMW_525i_Noob's Avatar
BMW_525i_Noob BMW_525i_Noob is offline
A Purist's Nightmare LOL
Location: Shreveport
 
Join Date: Dec 2005
Posts: 669
Mein Auto: 525i
Thumbs up Replaced Diamond Key Battery

Key was dead because of a bad battery. I pryed open the case to find the Batt spot welded in place. Used a jeweler's screwdriver and a lil elbow grease to pop the welds. (took about 15 min to do both welds. If you succed without breaking the contacts... repleace with Rayovac CR2016. Use a lil glue to hold the batt in place (rubber cement or like NOT SUPER GLUE!) and glue shut with super glue or your choice.

Reprogram per instructions on this site and you are done!

Link to another post with instructions: http://bimmerfest.com/forums/showthread.php?t=8043
1) Get in and close all doors.
2) Turn on the ingition 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 reciever antenna - someone else suggested this).
5) Hold down the unlock button (which is button 1 on my key) and press the lock button 3 times (center button on my key). Release the unlock button and the doors lock which confirms the operation.
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two tone silver/black interior
rear armrest subwoofer (10" DVC Orion) w/Fosgate 5002
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Last edited by BMW_525i_Noob; 04-06-2008 at 05:32 PM.
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  #2  
Old 04-06-2008, 05:43 PM
Steve530 Steve530 is offline
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Location: Knoxville, TN
 
Join Date: Dec 2007
Posts: 1,281
Mein Auto: 2001 530i
A CR2016 worked? I thought it was a Panasonic VL2020.
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  #3  
Old 04-06-2008, 06:56 PM
BMW_525i_Noob's Avatar
BMW_525i_Noob BMW_525i_Noob is offline
A Purist's Nightmare LOL
Location: Shreveport
 
Join Date: Dec 2005
Posts: 669
Mein Auto: 525i
It worked for me...
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20" Gloss Black powder coated Voxx wheels
custom powder coated window/pillar/door trim
gloss black door/bumper trim
carbon fiber roof spoiler
silver M5 trunk spoiler
front lip spoiler
euro eyelids
two tone silver/black interior
rear armrest subwoofer (10" DVC Orion) w/Fosgate 5002
custom painted gloss black head unit (6.5" flip out DVD)
Aluminum pedal set w/dead pedal
H&R SPrings w/Bilstein Shock
Custom catback exhaust w/flowmaster muffler
4.10 Diff swap
Conforti Shark Injector
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  #4  
Old 02-23-2013, 05:10 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,088
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by BMW_525i_Noob View Post
It worked for me...
That's the wrong battery.

Details are in the following threads.
- How to replace the old-style BMW E39 square key battery (1) (2) & how to replace the rubber key pads in the old style square keys (1) (2) & where to send your bmw diamond key for repair (1) (2) & what battery to use in the diamond key (1) (2) (3) (4) (5) (6) (7) & square key to diamond key makeover and transponder retrofit (1) (2) & how to recharge your key out of your BMW and how long a BMW key will last in the drawer before it needs that off-the-car recharging (1) & converting the old-style square key to the newer diamond shaped key (1) & the details on swapping the BMW diamond key transponder (1) & what else can go wrong with your diamond key other than the battery (1) (2) (3) & proper diamond key initializing (1) (2) (3) & what to do if your key is locked inside your bimmer (1) & a description of the various types of BMW Remote, Illuminated, Spare/Wallet, & Valet/Service keys (1) (2) & a list of diamond key EWS, FZV, & DWA functions (1) (2) & all about the 10-key limit to programming your own keys at home (1) & a description of the ignition key ISN (individual serial number) ten-second rule (1) & what to do if you lost your only diamond key (1) or what to do if your BMW key was stolen (1)
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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