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We have had a persistent low key fob battery message start now on our 2016 S90D on FSD Beta 11.4.7 (2023.7.30). It only happens with key fob 1. It just started with installing the aforementioned software version. Replacing the battery did not clear the message.
I bought my MS September 2019. Key fob low battery came on. I thought it was a little pre-mature but didn’t think much of it. Got a new battery, replaced it in my key fob, but the message is still there. Even after several hours of being parked. Go back to the car, unlock it and same message...
I got the low key fob warning, so I replaced the battery with a generic cheap battery, and it wouldn't work at all. I tried another one and same thing. I tested the cheap battery, 3.3v, so it should have worked, but when I put it in the key fob and tried opening doors, frunk, trunk several times, I took the battery out and it was down to 2.7 volts.
I got the ones from Amazon and yes they are not OEM batteries... just like the review pictures, they were shipped in little zip lock bags. But they worked fine for me. I bought them in April 2019 and the keyfob still works now.
I'm getting about 2-3 weeks per cell with 2022 S. Our prior 2016 S fob batteries lasted 3-4 years. Location of the fob when not in use is the same between cars.
I have a 2018 MX that needs a new battery for one of my Key Fob. But a little confused as to the correct type to best use. From the MX manual (Page 11) there are two batteries referred to Insert the new battery (type CR2354) with the ‘+’ side facing up. But later on the page it states: "Note...
Same problem with four year old 2018 Model S (just past warranty)—two suddenly disfunctional key fobs, messaging ‘Replace battery’ and later ‘Key not detected.’ Simply replacing battery had no effect. Did a Full Soft Reset, then, per your suggestions, >>replaced BOTH key fob batteries IN CAR with new (3.3V) batteries<< and …
Went in the house grabbed the spare key, started right up. Just checked Fob battery, 0 Volts. Put a brand new battery in, fob unlocked the car and it started fine, went back in the house. Tried it again 15 minutes later, no response from the car. Checked battery voltage, 0 Volts. Never happens on the Model S.
OTOH 12 months is sad. Only one in my Toyota Smart Key which works just like the Tesla key. Still on my 2nd at 7 years. Mercedes-Benz uses two CR2025's in my KEYLESS-GO key (M-B needs to hire someone to name things) which also seem to last about 3 or 4 years. Looks like I'll be spending the money saved on gasoline for key fob batteries. :smile:
Just took delivery of a 2018 Model X 75D. We were given two key fobs. One was dead and the other had a low battery. The Fremont delivery center where I picked it up did not have any more Model X compatible batteries. I transferred the low battery into the other key fob just to check that it was paired to the car and working. Thankfully it was.