06-09-2021, 05:06 PM | #1 |
New Member
6
Rep 10
Posts |
Dead Battery? Remote doesn't work and nothing when pressing Start button
2020 X3 M40: I came home last night and locked my car (on the 8th floor parking garage). I just went to get in my car and the door did not unlock via comfort access or clicking the key fob button. So I took out the little metal key and unlocked the driver door manually.
Nothing happens when I click the Start button... The security alarm light is flashing in the mirror. The hazard light (triangle) button is illuminated and the Start/Stop button is illuminated. I have no idea why the battery would suddenly be dead overnight. Nothing strange prior to this. I can't open the rear hatch door to access the battery. Being in a parking garage, I can't hook up a battery charger (no outlet), so my brother is going to bring his marine battery and jumper cables to give a try. Anyways, just thought I would post here while I'm waiting in case there is anything else I should look for.... |
06-09-2021, 07:06 PM | #2 |
BMW CCA Member
493
Rep 808
Posts |
Yep. It happens. When the battery starts dying or dies there really isn't much warning.
My E36 M3... fine one day, then dead battery. My wife's 2021 X3... bought 2 weeks ago, drove fine 1st week. Then the digital cluster went dead. Came back on with plug/unplug battery. Then 3 days later dead again. Left parked for 2 days. Car is DEAD. No electronic anything. Measured battery with voltmeter... 5v. Tried a CTEK charger... 12 hours later... 11.95v. Won't even crack 12v. Went to dealer this week. 77 fault codes. 6 of them electronics related. The other 71? voltage. Battery is bad per the dealer. They did suggest to either lock the car or press the radio button to completely turn off the car. Thinking BMW got some bad batches of batteries. NOTE: Make sure you jump your car from under your car hood. But thinking since you can't open the rear hatch, you probably already did that! |
Appreciate
0
|
06-09-2021, 07:11 PM | #3 |
First Lieutenant
294
Rep 323
Posts |
Are you sure your car battery is dead and not just the key battery? Our X3s are known for going through key batteries really frequently. If it's the key then there's a spot on the right side of the steering column where you can hold it to start the engine.
That said I once had a 12V battery suddenly go bad on a new car and it was replaced under warranty. Just randomly wouldn't start one day when I was out shopping. With almost any part a certain number of defective units will escape the factory, and car batteries are no exception. |
Appreciate
0
|
06-09-2021, 07:24 PM | #4 |
New Member
6
Rep 10
Posts |
Thanks guys.
Yes, I tried placing the fob next to the steering column just in case, but it's not a dead fob. We jumped it (under the hood) and I was driving it around to get the charge back and there is a lot of weird stuff going on now. The radio does not work. The buttons around the gear shift (menu, etc) do not work. And then I got a CEL about possible drivetrain issue So I suppose it will be a trip to the dealer to see what is the root of all of this. I also notice that the backlights around the headlamp knob (to turn on auto, parking, etc) stay illuminated even after the car is off and locked....I can't recall if that is normal. And I always lock my car. Thanks for your help! |
Appreciate
0
|
06-09-2021, 07:48 PM | #5 |
New Member
5
Rep 18
Posts |
Why not jump from the trunk? My x3 wouldn’t start (everything was dead). Jump from the hood didn’t work but allowed us to open the tailgate. Finally got it started from the trunk. Is that bad for the car?
|
Appreciate
0
|
06-09-2021, 08:15 PM | #6 |
BMW Elite Master Tech | HV Gen 5 | HV Specialist
3563
Rep 4,248
Posts |
You should generally not jump from the trunk. First off, it's rare you can ever even get a good bite from the jump clamps at the battery because the battery terminal connection is surrounded by protective plastic. That is why there are jump points in the front of the vehicle. If you have a good jumper jumping from the front won't give you problems.
|
06-10-2021, 09:56 AM | #8 |
First Lieutenant
260
Rep 383
Posts
Drives: 2023 BMW X3M40 1984 911 TARGA
Join Date: Nov 2020
Location: Prescott Valley AZ
|
My x3 wouldn’t start (everything was dead). Jump from the hood didn’t work but allowed us to open the tailgate. Finally got it started from the trunk with BMW assist. Dealer replaced battery as there was a service advisory on this.
__________________
2023 X3 M40I 2018 X3 30i M Sport
2011 550i 2005 325i 1985 535I 2017 F150 2016 GS 2004 545i 1994 525I 1984 911 TARGA 2014 HD ULTRA |
Appreciate
0
|
06-10-2021, 01:31 PM | #9 | |
First Lieutenant
294
Rep 323
Posts |
Quote:
|
|
Appreciate
0
|
06-10-2021, 03:30 PM | #10 |
New Member
6
Rep 10
Posts |
When I went to try to start it this morning, it would not start, but did have enough juice to show me an error on the screen:
"Battery Management. Start Engine. Malfunction while shutting down the vehicle electronics when vehicle is stationary. If the problem recurs, have it checked by your service center." So it sounds like it isnt shutting down properly and is draining the battery. I jumped it and dropped it off at the dealer... |
Appreciate
0
|
05-09-2024, 06:54 PM | #11 | |
Registered
2
Rep 4
Posts |
Quote:
|
|
Appreciate
0
|
05-09-2024, 09:38 PM | #12 |
Captain
348
Rep 744
Posts |
I recently ran into this issue, I couldn’t even raise the trunk lid to access the battery. I had to call AAA to give me a jump. I bought my own battery and replaced it myself. Used ISTA to code the car to the new battery and called it a day.
__________________
2018 BMW 530e Alpine White | Black Napa Leather | Bone Stock
|
Appreciate
2
KingM40i1.50 Rottweiler4068.50 |
Post Reply |
Bookmarks |
|
|