Wednesday, April 10, 2019

Land Rover LR4 H7 to H8 Battery Upgrade

I recently replaced my battery after receiving a few low battery warnings and decided to upgrade to an H8 from the factory H7 size. Overall this is a simple battery swap, but I wanted to include the steps to update the Car Configuration File (CCF) and reset the Battery Management System (BMS), along with resetting the power windows and sunroof.

Batteries
  • (old) CarQuest Gold 94RH7 CCA 800 CA 1000 RC 140 (LxWxH) 12.5" x 6.8" x 7.4"
  • (new) Bosch Premium 49-850BAGM CCA 900 CA 1080 RC 185 (LxWxH) 14" x 6.87" x 7.43"

Tools
  • Ratchet (1/4 or 3/8)
  • Ratchet Extension
  • 8mm Socket (battery clamp bolts)
  • 10mm Socket (battery terminal nuts)
  • (optional) IIDTool

Torque

  • Battery clamp 5Nm (4 lb.ft)
  • Battery terminals 5Nm (4 lb.ft)

Steps


1. (Optional) Fully charge the new battery, mine took around 24hrs with a 12V 1.25A charger


2. Remove battery cover and battery clamp



3. Disconnect battery vent




4. Disconnect battery terminals and remove battery




5. Install new battery, reconnect vent, terminals and clamp




6. (optional) Update the battery type in the CCF using IIDTool


    Car Config >  BCM-Body Control > Battery Type (H8HD 90Ah 950 cold cranking ampere)




7. (optional) Reset the BMS


    Service/Test > BCM-Body Control > Battery Replacement




8. (optional) Reset automatic power windows (auto up) and sunroof, I also had to reset the date, time, and temperature settings (C/F).




3 comments:

  1. Hi, many thanks for your very clear description, and in particular for showing IID screens. There are many posts on many forums (fora?) saying that battery needs to be reset in BCM and CCF needs to be changed, you're the only one showing how - Great
    I'm preparing to do similar change from non-AGM to AGM battery, except my old battery is already H8 size. Please do you recall how you "told" the car in CCF that the new battery was AGM? Or does it figure it out by itself? Regards, Alan

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    Replies
    1. Glad you found this post useful, the only options I could find regarding battery type were under Car Config > BCM-Body Control > Battery Type.

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