Quote:
Originally Posted by ted99
My question: Does anyone know if the 530e will have a similar maintenance charge from the high voltage battery to the 12v battery? I understand that BMW has been automatically replacing the 12v batteries in the 528i at the second service because of premature battery failure due to inadequate charging of the 12v battery.
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I cannot say with 100% certainty about the 530e, but the PHEV hybrid system is probably nearly identical to my 2017 X5 40e (and the 330e and 740e). For the X5 40e the 12V batteries are charged off either the high voltage battery or the onboard charger. I've tried putting a CTEK charger on the 12V terminals and it always shows fully charged. The X5 40e (N20 engine) is not part of the service bulletin which automatically replaces the 12V batteries at the 2nd service.
http://www.bimmerfest.com/forums/sho...5&postcount=12
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2017 X5 xDrive40e - Driver Assistance Plus, Adaptive LED Lights (decoded VLD + Glare Free High Beam), ACC Stop & Go, Night Vision, 275/40R20 315/35R20 Pirelli PZero + Pirelli Scorpion Ice & Snow
2018 330e - Driver Assistance Plus, Adaptive LED Lights (decoded VLD), Active Blind Spot Detection, ACC Stop & Go, Parking Assistant, Side/Top Cameras, HUD, Comfort Access, 225/45R18 255/40R18 Pirelli Cinturato P7 + Winter Sotozero Serie II