Near annual replacement of 12V battery is typical according to Tesla Service Tech

[aaron0k]

MS40 at 78k miles. Have not had to replace my 12v (yet).

 

[Todd Burch]

In 35,000 miles on my first 2012 S and now 75,000 miles on my 2014 S, I've never had to replace the 12V battery yet (knock on wood).

 

[thecloud]

...on my 2014 S, I've never had to replace the 12V battery yet (knock on wood).

Same here. I wonder if it's a nature-or-nurture thing; i.e. is the difference simply that we got a "good" 12V battery in our particular Model S vintage, or is there something "good" we do that avoids battery wear and reduces the number of deep discharge cycles?

 

[iffatall]

As discussed before, driving and charging routines can also be a factor. Lots of theories have been floated, but I don't think none of them have fit all data points.

 

[Evoforce]

Some of it also has to do with the main traction battery problems not charging the 12 volt.

 

[mrElbe]

3 years and over 172,000 km ( 107,000 miles ) and still on original 12V battery BUT my " vampire drain " has increased lately. Could that be due to the 12V battery being charged more often by the main battery and the end is neigh.

 

[zwede]

After the recent SW updates I've noticed the contactors stay closed hours after shutting the car off in order to float the battery. This didn't use to be the case so Tesla has updated the 12V charging strategy. I have a battery tender and since the last couple months the tender will wait with doing anything because it's sensing the car charging. Eventually the car stops and the tender takes over.

 

[mknox]

3 years and over 172,000 km ( 107,000 miles ) and still on original 12V battery BUT my " vampire drain " has increased lately. Could that be due to the 12V battery being charged more often by the main battery and the end is neigh.

You're lucky. I've had 3 or 4 12v replacements on my 2013 S with just under 100,000 miles (160,000 km). I noticed no difference in vampire loss after 12v replacement, and the last one was replaced "urgently" because of a 12v Battery error message.

 

[blackscraper]

2 years, 42.7K KM, no replacement yet

 

[AmpedRealtor]

Tesla must have done something because I have not had a replacement in over 2 years. I had one replacement about 12-18 months into ownership, but at 71,000+ miles now and almost five years in with only one replacement needed.

 

[sorka]

Tesla must have done something because I have not had a replacement in over 2 years. I had one replacement about 12-18 months into ownership, but at 71,000+ miles now and almost five years in with only one replacement needed.

Same here. My first battery went bad at 6 months but the replacement is 2.5 years old. I was really hoping it would fail again before the warranty expired.

 

[Barry]

Same here. My first battery went bad at 6 months but the replacement is 2.5 years old. I was really hoping it would fail again before the warranty expired.

Same here. My first one failed within a few weeks, and #2 going strong for 2 1/2 plus years.

 

[eelton]

I've had one replacement and I just got a warning to replace again. Under 30K miles on a 2013 S85.

I suppose it makes sense that it's more about time than miles driven.

 

[TLej]

Just had my first replaced last Thursday, 26 months and about 54,000 km in.

 

[Doug4650]

No replacement yet. 28,000 miles. 2.5 years.
.

 

[smsprague]

Getting my original replaced tomorrow. 44 months and 49,000 miles.

 

[mrElbe]

smsprague, Just under the wire to get it replaced under warranty. I am at 37 months and 176,000 km ( 109,000 miles ) and still on original battery.

 

[JHawk]

2013 P85 CPO purchased 02/03/2017 with 46k miles.

I got the 12v battery warning and had it replaced under warranty at the service center last week at 63k miles. I was on the list to have the air bag recall completed too. I don't know if they installed a new battery during the CPO process but I'm hoping I get more then 12mo on the new battery.

 

[Cyclone]

My 12v was just replaced, one month short of four years. It did well holding out for almost four years and 59k miles

 

[apacheguy]

Has everyone that has had 12 V replaced done so because they received a warning? No warning on mine, but vampire losses are creeping up quite a bit.