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12V battery replacement

masam

Member
Feb 18, 2016
264
53
MA
Wondering how soon have MX owners had to replace the 12V battery ? I just got a warning from our 2016 MX75D that the battery should be replaced soon. The car is always garaged and plugged in when not in use. This just seems too soon to have to replace a battery.
 

Poor Pilot

Member
Feb 4, 2018
39
16
TN
Wondering how soon have MX owners had to replace the 12V battery ? I just got a warning from our 2016 MX75D that the battery should be replaced soon. The car is always garaged and plugged in when not in use. This just seems too soon to have to replace a battery.

Picked my MX up about a week and a half ago and just got the message. Was told some 3rd party apps tend to drain the battery and you have 3-4 weeks of useability before it gets to a critical level. Needless to say they’re replacing it next week.
 

techiegirl

Member
Mar 1, 2018
19
19
Colorado
I picked my car up 10 days ago and have only had it for 8 days (in shop due to firmware issue) and I just got the message. It seems a bit too soon to get the message already.
 

Poor Pilot

Member
Feb 4, 2018
39
16
TN
I just updated to 2018.10.6 and the message has disappeared. I called the SC and they’re going to check the logs and see if everything looks good on their end. Hopefully it was just a software glitch.
 
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lymex2018

Member
Feb 4, 2018
132
146
China
Wondering how soon have MX owners had to replace the 12V battery ? I just got a warning from our 2016 MX75D that the battery should be replaced soon. The car is always garaged and plugged in when not in use. This just seems too soon to have to replace a battery.
Have you experienced any vampire draw when not plug in? What is the usual setting (on/off) for "Energy saving"?
 
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masam

Member
Feb 18, 2016
264
53
MA
Have you experienced any vampire draw when not plug in? What is the usual setting (on/off) for "Energy saving"?
I have "energy saving" on and usually see a vampire drain of around 3-4 miles when plugged in overnight. Haven't seen too much of a difference when not plugged in.
 
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lymex2018

Member
Feb 4, 2018
132
146
China
I have "energy saving" on and usually see a vampire drain of around 3-4 miles when plugged in overnight. Haven't seen too much of a difference when not plugged in.
One of my fellow here has the similar situation as yours.
As for me, I had a vampire drain of 12 miles per day before Nov. last year regardless of the setting. But now the car only draw less than 1 mile per day when I set "energy saving" on.
I suspect that the "12 battery service" message has something to do with the vampire drain.
 
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StephB

Member
Jan 15, 2018
20
8
Portland, OR
I picked up my X on Mar 22 and the 12V warning came on a few days ago. I have 2018.10.6. Is this just a software glitch? I haven’t heard back from the Service Center yet.
 
May 22, 2015
38
22
Castro Valley, California
Just sharing. In 3 years we had 2 batteries replaced by Tesla. Just had our 3'rd message popup and this time the decision was made to upgrade the 12v lead acid battery with the 12v Ohmmu lipo from Amazon. 12V Lithium Battery for Tesla... https://www.amazon.com/dp/B07K4X289T?ref=ppx_pop_mob_ap_share.
I replaced it myself after watching video on YT on how to do this. It is pricey and may not be for everyone. Don't know if it's going to last longer, we will see. But this is what I observed after install. My lights seem brighter and don't seem to fade so night driving and high beams are awesome. The premium sound seems a lot stronger and bass sounds are noticeably better. Your results may vary, but others have told me this aswell. Lead acid versus lipo 12v battery you will get more charge cycles and stronger current longer per charge, but we Tesla owners know this already with our large packs. So I can say that I am now happy to get the lead out.
 
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mbp11

Member
Jan 30, 2019
451
271
SF Bay Area
This is interesting but replacing the battery seems daunting. You have to about dissemble the entire frunk and posterior brackets, and you have to try not to get electrocuted. How long did it take you?
 

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