Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

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

Reply
 
Thread Tools Display Modes
  #51  
Old 02-21-2013, 06:58 PM
michaelvn michaelvn is offline
Registered User
Location: Australia
 
Join Date: May 2011
Posts: 12
Mein Auto: X5 E53
To BMC350i. Your prob has nothing to do with your repair (congratulation btw for a successful DIY).
What you need is to recode your Car/Key memory using NCS Expert.
Reply With Quote
  #52  
Old 02-22-2013, 06:22 PM
wolf888 wolf888 is offline
Officially Welcomed to the 'Fest
Location: Florida
 
Join Date: Feb 2007
Posts: 564
Mein Auto: 528i /C240/M35
Quote:
Originally Posted by ilhb View Post
WARNING!
What you get with this is that you wont be able to start your car next time your key runs out of battery.
This coil is used to get energy to the rfid that unlocks the electronic blocking system. When you plug in the key, a signal is sent to the key by the car and the key sends a signal back to the car using part of the energy contained in the signal sent by the car. This energy is collected using, correct me if I'm wrong that shame coil you are removing.

Thanks for the post.
Everything what you said will be correct ONLY for cars after 2000! but I`ve made this DIY for cars from 1996-2000 !!! My key still working great and it was already over 2 years!!!!!!!!!!!!!!! + when battery will die I`m will replace battery with new one easy and quick

Last edited by wolf888; 02-22-2013 at 06:27 PM.
Reply With Quote
  #53  
Old 02-23-2013, 04:43 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Here is a composite that I made from the information in this and other threads, expressly to help explain the diamond key replacement particulars for others, long after we're gone.
(Let me know if it's missing any critical detail.)

.

.

EDIT: Removed pointers and screenshots to www.bmwgm5.com/KF_WoS.htm as per PM from scottjoh.
__________________
Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 02-26-2013 at 07:52 AM.
Reply With Quote
  #54  
Old 03-06-2013, 11:52 AM
seventysix seventysix is offline
Registered User
Location: UK
 
Join Date: Mar 2013
Posts: 3
Mein Auto: 318i
Damaged Key PCB

Hi,

New here, first post of hopefully many.

First question -

Purchased a second hand 318 with no working remote.

The key was all taped up, and once cutting through it all I can see why it doesn't work (picture).



I am in the UK and this is a 433.92 MHz key.

Looking back through this thread I can see that a previous post stated the component (on the left as you look at the picture), is a 22nH coil for a 315MHz key. The post is specific as to the key frequency, so does anyone know what it would be for a 433.92 MHz key?

The component on the right looks to be a capacitor, but what value?

Also the battery was floating around and two of the micro-switches don't work, so they really buggered this one up.

Finally, will this pcb board work in a new key if I get one cut (it's really knackered looking), or is there anything within the plastic molding which assists with the immobilizer?

Thanks all for any advice.
Attached Thumbnails
Click image for larger version

Name:	IMG_0332 damage.jpg
Views:	2070
Size:	85.2 KB
ID:	365094  
Reply With Quote
  #55  
Old 03-07-2013, 04:43 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by seventysix View Post
The component on the right looks to be a capacitor, but what value?
You might do well by sending the key off to Scott at http://www.bmwgm5.com/key_repair.htm
__________________
Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
Reply With Quote
  #56  
Old 03-08-2013, 11:13 AM
seventysix seventysix is offline
Registered User
Location: UK
 
Join Date: Mar 2013
Posts: 3
Mein Auto: 318i
Quote:
Originally Posted by bluebee View Post
You might do well by sending the key off to Scott at http://www.bmwgm5.com/key_repair.htm
unfortunately this is my only key! and being in the UK...
Reply With Quote
  #57  
Old 03-08-2013, 11:17 AM
seventysix seventysix is offline
Registered User
Location: UK
 
Join Date: Mar 2013
Posts: 3
Mein Auto: 318i
Just need to know the values of the inductor and the cap, I've looked for circuit diagrams but have had no luck
Reply With Quote
  #58  
Old 03-08-2013, 12:05 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by seventysix View Post
Just need to know the values of the inductor and the cap, I've looked for circuit diagrams but have had no luck
Well, looking at the pictures on this thread, after zooming, I can't even tell 'what' they are (neither looks like an inductor, for example).
Both seem to be connected to the antenna; however, circuit boards can be many levels deep, so all we can 'see' is the top trace.
Attached Thumbnails
Click image for larger version

Name:	closeup.jpg
Views:	1983
Size:	46.5 KB
ID:	365383  
__________________
Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 03-08-2013 at 12:06 PM.
Reply With Quote
  #59  
Old 06-28-2013, 04:46 AM
Toolhead Toolhead is offline
Registered User
Location: Australia
 
Join Date: Jun 2013
Posts: 1
Mein Auto: e39 530i
Diamond key replacement batteyr DIY (NO 56K)

Must use rechargeable battery - Panasonic or equivalent.
It does charge by induction when in the ignition driving.
If cutting fob open do not let blade go deeper than 2 mm.
If the fob won't initialize the new battery may be flat so use it in the car or sit it on a 3 volt source or close to - eg phone charger.
Replacing the battery is not hard just be careful not to damage the PC board and don't overheat the battery when soldering.
www.BMWGM5.com has product and some good advice.
Miles of batteries on eBay.
$300 per key from BMW here. What have you got to loose - have a go.
Reply With Quote
  #60  
Old 08-23-2014, 08:42 AM
540iman's Avatar
540iman 540iman is offline
resident, old fart
Location: N.W. Indiana
 
Join Date: Sep 2008
Posts: 1,812
Mein Auto: 2002 540i sport
Know this is an "older thread", but I have seen possibly other threads where people have tried to find batteries with 4.0 V or higher amp hour ratings to either increase range or increase battery capacity between charges. Do NOT do this. If you buy a battery with a higher amp hour rating, then the induced recharge current needs to increase as well. The same goes for battery voltage. The rate at which a battery recharges is based upon the DIFFERENTIAL between the battery rated voltage and the voltage which is induced by the car. Stay with the rated voltage and rated capacity in terms of amp hour ratings or you may find that while you purchased a battery that in "theory" would work better, this is conditional upon the voltage and the maximum current that the induced charge has. Too big a battery in terms of Volts or amps requires a charging circuit which similarly has increased voltage differential and increased current in charge mode.
Reply With Quote
  #61  
Old 01-24-2015, 07:05 AM
mahres mahres is offline
Registered User
Location: netherlands
 
Join Date: Jan 2015
Posts: 1
Mein Auto: bmw x5
Quote:
Originally Posted by seventysix View Post
Just need to know the values of the inductor and the cap, I've looked for circuit diagrams but have had no luck
I am missing the same components, too. I mailed BMW5GM but he refused to tell me the values. he wants to do it himself for 50$, which far too expensive for soldering two components of 5 cents.

Did you find out which values these components have?
Reply With Quote
  #62  
Old 01-30-2015, 10:18 AM
ndz ndz is offline
Registered User
Location: AT LARGE
 
Join Date: Jan 2008
Posts: 77
Mein Auto: 00 528i/5, 99 540iT
Check the battery voltage before replacing it. It may be fine. I just fixed one of my diamond keys by re-flowing cold / cracked solder joints at the battery.

Hardest part is slicing the key open. It takes a lot of cuts with your blade. Have patience and don't cut yourself.
__________________
99 540iT -
00 528i/5 - Grüen Arrow
93 740i - Grün Hornet (sold)
00 740iL (R.I.P.)
Reply With Quote
  #63  
Old 01-30-2015, 10:39 AM
pudl pudl is online now
Officially Welcomed to the 'Fest
Location: Wien, Österreich, EU
 
Join Date: Jun 2012
Posts: 623
Mein Auto: BMW E39 530dAT 2001/04
Quote:
Originally Posted by ndz View Post
Check the battery voltage before replacing it. It may be fine. I just fixed one of my diamond keys by re-flowing cold / cracked solder joints at the battery.

Hardest part is slicing the key open. It takes a lot of cuts with your blade. Have patience and don't cut yourself.
Consider this. How old is the battery? You think it will last another decade? Replace the battery if you are going to glue the key back together.
Reply With Quote
  #64  
Old 04-14-2015, 06:11 AM
world24travelle world24travelle is offline
Registered User
Location: orlando
 
Join Date: Oct 2013
Posts: 2
Mein Auto: 525i 2001 and 320i 2000
DIY Key Fob replacement with regular battery

Hey guys,

This is my DIY on how i replaced the battery in my key fob. I used a regular watch battery and two weeks later its still working just fine.
Please give me feedback and tell me if there will be any issues doing it the way i did it
but i did not have to re-initialize my keys
my car is a 2000 320i

cheers

Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 11:47 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms