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  1. I

    REX engine sometimes starts at 30-35% battery instead of 6%

    alohart, you are correct in interpreting my first post. What you said makes sense, I am EE by profession and a bad cell or a bad connection between the cells could cause this erratic REx behavior. Again it happened last night when driving the car from Service, battery was at 26% charge with 20...
  2. I

    REX engine sometimes starts at 30-35% battery instead of 6%

    Dealer did re-program the REX feature before I got it, enabling 'charge-now' option, but my service wiped it out by accident and after it happened again the Service restored factory USA setting. Then it happened again. I only charge the car at home with factory L1 charger at 110VAC. Service did...
  3. I

    REX engine sometimes starts at 30-35% battery instead of 6%

    Hi i3 owners, I am a Colorado resident. I recently bought a used 2014 i3 from out of state and noticed that REX engine sometimes starts too early, usually between 30-35% battery charge. The REX is set to start at 6% battery charge by factory. When this happens, I usually continue driving. The...
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