Tuesday, August 28, 2018

How to change the battery in your BMW Key Fob


Changing your battery in your F-Series BMW Key Fob is easy. Just follow these 5 steps:

1) Press the button and pull out the car key in the direction as indicated by the arrow:




2) Notice the notch at the key fob:





3) Using the same car key, push into the notch and lift the plastic cover up:




4) Slowly lift the plastic cover with your fingers:




5) Presto! Your key fob has been disassembled, exposing the CR 2032 battery. Time to source for a good CR2032 battery and swap it in!





3 comments:

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  2. Hi, I have something for your blog if you would like to post.. your site has helped me a lot :-)
    I managed to FDL code SLI (Speed limit information) to work on my BMW F45 (Active Tourer).

    What is needed?
    An FSC code – this needs to be imported into the KAFAS2 ECU to enable the option. The FSC code is unique for the car VIN. The FSC code can be obtain through a few sources (BMW dealers, Tuners/ coding houses). PM me if your stuck for an FSC code.
    The usual software ESYS, ESYS launcher, and ODB to Ethernet cable.
    The car must have a KAFAS camera. I think the camera is standard equipment on all F45s as it is needed for Active Guard (Forward collision warning) which is shown in my brochure (UK Jan 2017) as standard on all trim levels.
    I'm not sure if navigation is strictly needed as well, I know that SLI does use a GPS location and maps to determine speed limit in addition to road signs detected by camera (my car has navigation plus).

    Why FDL (instead of VO code)?
    SLI on its own (without Driving Assistant) cannot be VO coded on the F45. Normally there is a distinct option code for SLI on BMW (8TH), but unfortunately this is not the case for the F45. On the F45 SLI comes only as part of driving assistant (5AS). I assume if you try to VO code all of 5AS without all of the hardware required you will have some issues (to be honest, I never tried).

    What do you get?
    Current speed limit as detected by camera reading signs, or by GPS location and maps, shown in the instrument cluster and also shown on the HUD (If a HUD is installed). Options in the idrive setting to turn the displays on and off. I believe you also get 'no overtaking restriction shown' in both places as well, but I have not managed to test this yet (hav'nt found the right road yet).

    How to import the FSC code?
    I used the information posted here (quite easy really):
    https://cartechnology.co.uk/showthread.php?tid=29432

    What FDL code changes do you need?
    I obtained this list by a mixture of: using NCD / CAFD What if tool (on option 5AS); ESYS code verification (with option 5AS); and a bit of educated guess; and a bit of trial and error.
    Im not sure if all of these are needed, but they are what I coded with no adverse effects...
    On the KAFAS 2 ECU:
    <<< CAFD_00001148.caf.000_029_006 (Kafas2) >>>
    Kafas2 > SLI_CODING 3010 > NPI_ON_OFF = F056
    Kafas2 > SLI_CODING 3010 > SLI_ON_OFF = F056
    On the KOMBI ECU:
    <<< CAFD_000009C8.caf.006_004_021 (KOMBI L7_MID) >>>
    KOMBI L7_MID > Anzeige_Konfiguration 3000 > SPEED_LIMIT = aktiv
    KOMBI L7_MID > ERM_Konfiguration 3004 > RCOG_TRSG_APPL = aktiv
    KOMBI L7_MID > ERM_Konfiguration 3004 > RCOG_TRSG_TIMEOUT = aktiv
    KOMBI L7_MID > FZG_Ausstattung 3003 > ANZEIGE_NPI = aktiv (Note: I think NPI stands for no passing information)
    KOMBI L7_MID > FZG_Ausstattung 3003 > HUD_NPI_ENABLE = aktiv (Note: only needed if HUD fitted)
    KOMBI L7_MID > FZG_Ausstattung 3003 > HUD_SLI_ENABLE = aktiv (Note: only needed if HUD fitted)
    KOMBI L7_MID > FZG_Ausstattung 3003 > TSM_ENABLE = aktiv
    KOMBI L7_MID > PIA_Einheiten 3008 > HUD_PIA_NPI = aktiv (Note: only needed if HUD fitted)
    KOMBI L7_MID > PIA_Einheiten 3008 > HUD_PIA_SLI = aktiv (Note: only needed if HUD fitted)
    KOMBI L7_MID > PIA_Einheiten 3008 > KI_PIA_SPEED_LIMIT = aktiv (Note: This was already aktiv for me)
    On the Head Unit ECU:
    <<< CAFD_00000DED.caf.003_015_037 (HU_NBT) >>>HU_NBT > EXBOX 3001 > SPEEDLIMIT_INFO = aktiv

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