03 Z4 FOB does not work after replacing the rear view mirror glass - Bimmerfest - BMW Forums

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 > Z Series > E85 / E86 Z4 (2003-2008)

E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

Thread Tools Display Modes
Old 10-03-2011, 10:43 PM
sunpower sunpower is offline
Registered User
Location: Qatar
Join Date: Aug 2011
Posts: 26
Mein Auto: Z4
03 Z4 FOB does not work after replacing the rear view mirror glass


I had an additional rear view mirror with out auto dimming from other car i fixed it temporarly till I recieved the refurbrished rear view mirror glass and after i replaced it the FOB does not work.

tried reseting the car by removing the battery cable for 15 minutes but did not help.

tried to re-intialise the programing process as if a new fob is being used but also no luck.

Any suggestion to get the remote lock unlock work again?

Reply With Quote
Old 10-04-2011, 10:12 AM
Wdupdog Wdupdog is offline
Registered User
Location: Spfld, IL
Join Date: Mar 2011
Posts: 45
Mein Auto: 08 si rdstr trpl blk
My apologies if you have already tried these methods. This is all I could find on coding remote. With temp mirror did remote work? I presume everything worked with key and no fuse is blown.========

Your keys are set to have one as a master ( key 1 ) and the other as ( key 2 ). There is no difference in the key other than, Key 1 will work with seat position #1 and key 2 will work with seat position #2. Swapping keys is a good idea. The key remembers how you drive and stores information about how you drive as well as codes. This is how the SA knows what your car is doing when you take it in for service and they put the key into the docking station attached to the computer on their desk. You can clear that information from the key and clearing the key will actually allow the car to preform better. Say you drive back and forth to work in heavy traffic all week and then the weekend comes and you plan to drive more spiritedly, clear the key. To clear the key, get in the car and close the door, turn key to position 1 for 20 seconds ( do not start the car), turn key to off ( do not remove the key ) turn key and start the car, the key information has been cleared. If you have not used the other key and it no longer works, do not panic. There is a procedure to fix that as well .

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.
Reply With Quote
Old 02-03-2015, 02:00 PM
Sailermon Sailermon is offline
Registered User
Location: Lake Tahoe, CA
Join Date: Dec 2014
Posts: 64
Mein Auto: 2003 BMW Z4 2.5i
When I bought my used 2003 Z4 from a BMW dealer last November, I received one Master Key, one new Key FOB that only works in the ignition (will not lock doors, etc..) and on badly worn key that seems to do everything the Master Key does. I wanted to use the nice new Key Fob, so I followed you directions, with two keys present. It worked fine, but when I program one key, the other one stops working. Its like it will only program one or the other, not both. Do I need to make sure the other key is not present when I program the second one? Or is it because I have another (third key) that is already programed, which was not present at the time.

Thanks for your help!

2003 Z4 2.5i Maldavian Blue/Beige
Reply With Quote
Old 11-08-2016, 12:24 PM
naphtaly naphtaly is offline
Registered User
Location: South Africa
Join Date: Nov 2016
Posts: 1
Mein Auto: 1 series BMW, Volvo XC90
BMW interior REAR VIEW mirror and Key Fob remote

ok, thanx good guys for the thread, i came in late but those who will have similar none working key remote fob after working on the rearview mirror or windscreen.... Note that newer models BMWs have 3 types of the interior rearview mirrors and one of them has Remote KeyFob sensor in the mirror housing. Working on the windscreen or replacing it many times tampers with the sensor and we break harness and wiring in the process. Coding will never help, buy a specific interior rearview mirror, recconect harness and voilaaaaa.... Mirrors commonly have Rain sensor, LED light, Dimmer Sensor, Compass Display, Temperature display and we dont realise that latest BMWs are hiding remote fob sensor or your key in the mirror. Your interior rearview mirror is the highest point in the car that offer better line of sight for keyfob signal receiving... Always replace with similar mirror or good aftermarket mirror to enable the Remote Lock Key sensor (remeber to match the harness? or any enabled feature that comes as car safety enhancing mechanism.

Last edited by naphtaly; 11-08-2016 at 12:29 PM.
Reply With Quote

See More Related BMW Stories

Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)
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 11:03 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms