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I just bout a used QX50 with the Autograph package. Got a great deal since it was sitting at the dealer lot for over two months and had several price reductions.

Of course the day after I purchased the car, it wouldn’t start because the main battery was dead. 100+ miles from home but luckily I had a portable jumper so I just jumped the car, went to autozone to grab a battery and headed back home to replace the battery myself. Of course no one has made any guides or YouTube videos on how to replace the battery so it took me a minute to figure out how it was mounted. So if anyone needs tips in the future, HMU, I gotchu! Lol

Anyways, the whole point of me replying is to say that even though I got the car started and driving, because the main battery was so dead, the car did lots of funky things during my 100+ mile trip home. There’s so many electronics that it seems the alternator cannot keep up with powering everything if you’re battery is in poor condition. It threw check engine lights. The cameras and sensors would become unavailable randomly. The worst was that the power steering was failing at slow speeds, and would make a loud click from the steering column with a corresponding loud thunk outside. No issues with acceleration.

Luckily I made it home fine, replaced the battery and everything returned to normal. I didn’t know until later on that there’s a second auxiliary battery. I hope that ones fine. I didn’t experience any of the issues OP was describing.

I hope we get more people using these forums soon. Would be great as these vehicles will inevitably break down, and to know how to mitigate issues without going to the stealership. I guess it will eventually happen once mine and everyone else’s warranties end and we’re left to our own vices.
 

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Yea cause I’m at end of mine didn’t know it had auxiliary battery hummmm. Where is it located I might change it just because 😼 put something stronger in there. 🤔 know what I mean yes I’m glad this forum is here I like hear 👂🏿 about issues before hand 🖐🏿 but I got 72,300 miles on mind 2019 QX50 essential brought it used with 12,000 miles it’s been good to me so far got all toys
I drive a ton and I’m at 38k miles so my warranty will probably be done by next year.

The auxiliary battery is in the trunk area, I haven’t explored back there yet so not too sure exactly how to access it.

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