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• GreenLane

  Member Since: 20 Nov 2022

  Location: Chester

  Posts: 40

   

  

  Put new battery in... need to tell car ???

  I put a brand-new battery into my MY17 HSE LUX. All seems well however I'm reading that the car must be told it has a new battery as a matter of urgency.
  
  I didn't realise it was a must! What contraption do I need to tell my car it has a new battery?
  
  Post #41854 5th Dec 2025 8:32 pm

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• JonM

  Member Since: 30 Jun 2016

  Location: North Yorkshire

  Posts: 678

   

  

  You should reset the BMS with a diagnostic tool. This tells the car to start a process of learning the characteristics of the battery so it can use it optimally.
  
  However, the BMS is constantly learning so it will work out the new battery's properties eventually even if you don't reset it.
  

  ---

  MY2026 D5 Metropolitan D350 - finally arrived after the cyber attack.
  MY2022 D5 HSE D300 - sold....MY2019 D5 HSE SD6 - sold
  Post #41855 6th Dec 2025 8:05 am

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