3 days ago my car broke down i couldn't open it and nothing was working. I called to customer service they eventually sent me towing truck after 6 hours waiting in the forest. The towing truck driver jumpstarted the car to put it into neutral mode. So the car turned on and i could drive by myself. So i didnt go to service centre because it was night and they wanted to tow it to service center wich 300 miles away from my home. I got home today and i got warning 12v battery must be replaced soon. I called to customer service and i was told to take my car to service center by myself because the car can shut down anytime and they dont cover towing twice per the same case. The service center is closed until monday and they dont want to cover rental car too. Its better for me to take my car to service center on Monday and if car shuts down to tow it. But I afraid would i be able to put my car in towing mode without replacing 12v battery if it shuts down again?
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12v battery must be replaced soon
- Thread starter Plombir
- Start date
After reading all these 12V threads, I started carrying a small jump pack in my 3
Yeah I’m thinking to do that. Once the car is turned on, then are you fine for the rest of the drive, assuming your main battery has charge?
How old is the car/battery? If it’s not old, could there be a problem where the DC to DC converter(?) is not charging the 12 volt battery? I assume this covered by the standard Tesla warranty? I never had a ICE battery replaced before the warranty expired.
I thought the 12v is used to power up the main electronics and accessories and did not draw much power. That is not what I read on some sites. It commonly draws high current for a brief time and typically runs the battery down few times a day. I wonder what conditions does it deplete and shortens the battery life to make it worth while to get this:
https://www.ohmmu.com/learn-more
Some folks seem to have their’s replaced often.
We don’t drive our cars much due to CV, I am also waiting for my M3 A/C to be fixed in September so I’m rarely driving it. Would leaving it plugged in be better for the 12v? I was charging the battery only when it drops below 40% or lower, and charge only to 60% which could be couple of weeks. I now have it plugged in all the time @60% after reading on the Tesla more. It seems to draining 10% per week if I don’t drive it. Our family are rotating brief drives on 4 cars just to avoid the problems of not driving them. I can’t wait for our lives to return to normal.
I thought the 12v is used to power up the main electronics and accessories and did not draw much power. That is not what I read on some sites. It commonly draws high current for a brief time and typically runs the battery down few times a day. I wonder what conditions does it deplete and shortens the battery life to make it worth while to get this:
https://www.ohmmu.com/learn-more
Some folks seem to have their’s replaced often.
We don’t drive our cars much due to CV, I am also waiting for my M3 A/C to be fixed in September so I’m rarely driving it. Would leaving it plugged in be better for the 12v? I was charging the battery only when it drops below 40% or lower, and charge only to 60% which could be couple of weeks. I now have it plugged in all the time @60% after reading on the Tesla more. It seems to draining 10% per week if I don’t drive it. Our family are rotating brief drives on 4 cars just to avoid the problems of not driving them. I can’t wait for our lives to return to normal.
+1 recommendation for a jump pack and/or charger. This is enough to "start" the car even if the 12V battery is dead or dying (once driving, it will get 12V from the main high voltage battery). Maybe go pick that up now if you can?
Being plugged in shouldn't make any difference to the 12V battery. It will charge it as needed from the main pack, regardless of whether or not the car is plugged in.
I haven't confirmed, but the OEM supplier of the battery generally provides the warranty for batteries. For any replacement after the original, the battery carries a separate warranty.
Being plugged in shouldn't make any difference to the 12V battery. It will charge it as needed from the main pack, regardless of whether or not the car is plugged in.
I haven't confirmed, but the OEM supplier of the battery generally provides the warranty for batteries. For any replacement after the original, the battery carries a separate warranty.
M3BlueGeorgia
Active Member
If draining at 10% per week check out whether you have Summon Standby activated (its on by default), unless that's something you use.
If I was in this position I would purchase an aftermarket AGM battery and be done with it. Size 51R seems pretty close to the original.
I’m getting an M3 in several days so I’ve been reading the manual in preparation. The manual mentions at least twice to always keep the car plugged in when you can.
OK I am really happy that Tesla has copied the Leaf HV and LV system.
If the 12v system fails, battery well you are as they say SOL.
Now as a electrical engineer I would say a high school kid would have
a better solution. My leaf had a 12v battery die and I could not push it off
a cliff. WOW tesla too!! No failsafe to go to the big battery. Instead of a spare
tire maybe we should get a spare battery.
If the 12v system fails, battery well you are as they say SOL.
Now as a electrical engineer I would say a high school kid would have
a better solution. My leaf had a 12v battery die and I could not push it off
a cliff. WOW tesla too!! No failsafe to go to the big battery. Instead of a spare
tire maybe we should get a spare battery.
Well I would have loved to been in the design review of
the 12v system. If the battery fails then our "ISO" spec says
you are stuck either in or out ..SOL. At least Tesla should send
out xmas cards saying your battery is about to sh#t the bed. I am
sure some designer said, well you just push start it. Interesting!!
the 12v system. If the battery fails then our "ISO" spec says
you are stuck either in or out ..SOL. At least Tesla should send
out xmas cards saying your battery is about to sh#t the bed. I am
sure some designer said, well you just push start it. Interesting!!
Well, I would say that there are now a lot of 2yr old Model3s with 2yr old batteries. Mine included, but yet to be replaced.
So that’s about the average life to expect? My experience with ICE has my expectations at 4-5 years, which is why the 2 seemed so early to me.
There are many causes, but the general perception based on responses to recent threads is about 2 years.
I will agree with you on the ICE, I just had to replace my Prius v 12v battery, it was OEM and lasted 6 years. Both cars are in a non-conditioned garage, which is currently pretty warm. If you can garage your cars it will keep everything from upholstery to batteries in better shape.
I will agree with you on the ICE, I just had to replace my Prius v 12v battery, it was OEM and lasted 6 years. Both cars are in a non-conditioned garage, which is currently pretty warm. If you can garage your cars it will keep everything from upholstery to batteries in better shape.
I don't know yet what was the problem but before my car died it opened rear windows. So we could get in the car and open it from inside.[/QUOTE]
[/QUOTE]
Same happened with me. Rear windows rolled down. I dont know why the big battery can’t just supply the 12v until you get the car home and on the charger.
EnrgyNDpndnce
Member
I got 80k miles out of my 12V which seems pretty normal compared to ICE experience. Remember too that hardly anyone will start a thread titled “After 2 years and 50k miles my 12V has not died.”
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