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Old 11-08-2016, 03:28 PM
Join Date: Mar 2016
Location: Newport Beach, Ca
Posts: 4
Leo e70 is on a distinguished road

I have an 08 4.8l with 133k. Was on the freeway yesterday in 5th gear and out of nowhere my AWD 4X4 DTC lights came on as well as my brake light. The car seemed to be a little more unstable than usual (assuming the stability control was malfunctioning). As i let off the gas and made my way to an exit my transmission gear light came on and a transmission malfunction message came on. I pulled off the freeway and was stuck in 5th gear which made me accelerate like a snail at lights. Found a parking spot where I had to leave in an uber to a meeting so i didnt try starting it until 3 hours later.

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I came back thinking my x5 was done for. The battery surcharge light was on and started rough on first go. Looks like it was only battery issues that caused malfunctions. Anyone have any reputable batteries they recommend. I have an aftermarket sound system which pulls more energy from battery.
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Old 11-08-2016, 08:14 PM
Join Date: May 2010
Location: on the edge of existence
Posts: 1,384
blue dragon will become famous soon enough
Once the car is running, its the alternator that powers things, and if your battery light is on, I would say your alternator is not charging it.
Diagnosis, possible bad alternator

| '17 F15 X5 35D - Work horse | '17 F48 X1 MSport Daughter's daily | '22 Tesla MY LR Wife's Daily | '09 E70 X5 35D - Out to pasture |
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Old 11-23-2016, 03:27 AM
Join Date: Aug 2012
Location: NYC
Posts: 124
euge is on a distinguished road
Leo, does your X5 have rear climate control? If it does you have a 220 amp alternator, which should be enough to power your aftermarket system. Also, after all these messages appear, are they still present after turning the car on/off?
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battery draining, bmwx5, malfunction, transmission

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