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Anybody have their 12v battery exchanged recently?

Got an email from Tesla service yesterday morning saying my 12v battery needed to be replaced. I called Syosset minutes later. An hour and a half later the ranger showed up at my house and installed the new battery in the garage. My first experience with service as the car has only 3500 miles. Excellent service and very professional. By the way, I had no idea there was anything wrong with the battery.

Had mine replaced last week when I brought my car to Syosset, Long Island for a stuck Charge Port door. They replaced the charge port and then told me they needed to replace the battery.

I got the same email. Going in for annual service and a new battery

Yep, 3 times in 13 months.

2nd service 24000 miles. No known issue with my battery but they changed it out at my 2 nd service.

24k miles as well, they also swapped it out. this will be my third one.

Received email last week and I had not had any problems. So they picked up MS85 Fri morning replaced 12v, did a couple of service bulletin updates, firmware update and returned call Fri afternoon. Also my 3rd 12v battery.

Didn't Tesla fix this issue via a new battery supplier? What exactly is the issue?

Hello you.. i am here in Germany..

one of the proud first 500 owners in Europe..

have a red 12V Battery in my (also red) Tesla S.

do you have the same colour ?

whats wrong with that battery ?

i plan to install a little solar panel to avoid
battery getting broken..

The red battery is supposed to handle deep cycles better. Before sleep mode worked, the 12V worked overtime since it kept the computers going 24/7.

had mine replaced last year at annual service. Seems to reduce drain while in sleep mode.

last week at my first year annual service, I meant.

Not sure how they determine to swap a battery, but mine was also done at 1 year 12000 mile service. Vin 2859. I haven't heard that later battery lots had any problem. Car runs great with nearly zero problems. Service is better than any I have ever had! Enjoy!

FWIW, I have 9 months and 11,500 miles on my S85 from a May 2013 delivery--original 12v battery. Have a routine 12k service scheduled in a month--assume that I will get a 12v battery swap.

Are all these battery swaps free of charge?


Free of charge, but for how long? If there is an inherent problem with the batteries are we expected to pay for them once we hit 4 yrs/50,000 miles? If a "normal" battery in an ICE can go 5 years, running all of the electronics in the car, then what is wrong with these 12V batteries that runs just the non powertrain electronics, that the car is eating them up?

The story on the early 12V batteries is Tesla purchased them from an American company, who then sourced them from China, who then sourced them from Vietnam. The batteries were not the quality that Tesla had purchased and they were failing at an usually high rate (maybe 1-2%)?

Tesla replaced these batteries. Perhaps the replacement batteries also were not as good as Tesla wanted, and while not failing, Tesla seems to be going through the fleet and replacing them with a newer design when cars come in for the annual.

I don't think there is any issue with the electronics, but they do charge and discharge differently than an ICE car. The battery is different than ICE car batteries. It is a sealed gel-seal, a design that has proven very reliable (when the battery is good).

Is there any indication as to when they started putting better batteries in the cars on the assembly line? My car is due to be built in 3 weeks.

Sorry, no idea. My car is 13 months old and they replaced it at the annual. I expect new cars are all getting the latest battery for some time. It would be quite costly for Tesla otherwise!

Uh-oh. 3 weeks, Jordan? That means your car will be coming off the line in the last week of the first quarter; that could be a problem. The last week of the quarter last year is when they decided to dump all the A batteries into the production line even though Bs had been installed for months. Also, the gasket guy usually takes off in March to visit his ailing grandmother in Belgium and he's replaced by the guy who sweeps up. Get ready for some wind noise. You know the old saying March comes in like a lion and out like a Tesla with a poorly fit panoramic roof.

Maybe it'll all be good, though. Still, better to hope for the best and plan for the worst. :-)

Ha-ha. My car is due to be built the week of Mar 10th and will get here (CT) presumably on the 26th. My DS gave me a choice of dates for delivery of 27, 28, or 29.

I plan on going over the car with a fine toothed comb and take it for a drive, to check for any air leaks form the roof and that missing gasket from the Belgian ( :-) )before signing anything.

@jordanrichard, are you sure they will "let" you take it out for a test drive before handing over your check/signing anything????

No, I don't expect that they would let me drive off on my own, but perhaps my DS could ride shotgun. I just don't want to sign paperwork, drive off, and discover there is an issue with the alignment, wheel vibration, roof air leak etc. Sure they could fix it after the fact, but that's not the point. The DS or at least who ever preps the car for delivery should do a last minute quality check before delivery. There have been a couple of reoccurring things I have found on the various cars I have test driven that should have been caught before being put into service.

So I will be on the look out for those and insist they be corrected before they get my check. Business is business.

My 2 cents...Tesla should just make their own 12V battery .

It is more than just the battery quality that has been at issue. Tesla changed the battery technology completely, converting the early cars from standard 12 volt to a deep cycle AGM battery. It requires a wiring harness and firmware update. I have had two 12 volt batteries so far, with the conversion kit being applied when the first was replaced sometime last summer.

Seems somewhat odd to me, that with so much battery power available, that an additional 12V battery would even be needed.

I had mine replaced in January. Had the car for a year and my annual service was not quite up yet. Got the email about the 12v, so I went in to have it done before my first trip to Vegas. Wanted to make sure the car was in tip top shape before the road trip.

Similar to @PD, I did not have the early lemon 12V and mine was swapped out for the deep cycle 12V at annual service.

Got mine switched out at only 4,000 miles. My service rep implied that they are not really certain that they will have a permanent fix for the issue.