How long does fob battery last?
#1
MBWorld Fanatic!
Thread Starter
How long does fob battery last?
My fob battery is only 9 months old and I got a replace fob battery message when I try to start the car yesterday. Almost all my other car's fob battery will last more than 1 year, some as long as 2 years. How often do you guys replace your fob battery?
#2
Mine also lasts about 9 months. Wife's Nissan remote's battery has never been replaced - 6 years old and the range is still the same.
I keep spare batteries in the house and in the car. Since I only use one key fob, I should probably check the other one's battery..
Edit: I have Keyless Go
I keep spare batteries in the house and in the car. Since I only use one key fob, I should probably check the other one's battery..
Edit: I have Keyless Go
Last edited by JSch; 08-17-2016 at 11:55 AM. Reason: Add Keyless Go
#3
Member
When I got my CPO three years ago the dealer replaced the fob battery, it is still working just fine.
#5
MBWorld Fanatic!
Thread Starter
#6
MBWorld Fanatic!
I get about 1 year and I have Keyless Go
Trending Topics
#8
MBWorld Fanatic!
With keyless go E350, 3-6 months on average with the CR2025, with a slightly thicker CR2032 it lasts about a year.
Without keyless go C300, battery at 5+ years and still working fine
Without keyless go C300, battery at 5+ years and still working fine
#9
MBWorld Fanatic!
Join Date: Mar 2014
Location: Northwest Illinois
Posts: 6,370
Received 679 Likes
on
644 Posts
2014 E350 also restored: 1969 Camaro convertible SS 1957 Chevy Belair 2dr hardtop
The first time I had oil change the dealer replaced the battery on remotes. They lasted about 2 weeks Went back and told them to use new batteries this time. Knock on wood I now go in once a year for oil change and I have them replace the batteries. No problems since I told them to use new batteries.
#10
Senior Member
Join Date: Apr 2006
Location: Barrington IL
Posts: 415
Likes: 0
Received 28 Likes
on
22 Posts
2015 E 250, 1999 BMW M Roadster, 1939 International Harvester, 2023 GLC
I read somewhere there is a TSB on the "replace key battery" warning. A software issue.
My 05 W211 never had battery replaced. They should last a few years I'd think.
My 05 W211 never had battery replaced. They should last a few years I'd think.
#11
MBWorld Fanatic!
Join Date: Mar 2014
Location: Northwest Illinois
Posts: 6,370
Received 679 Likes
on
644 Posts
2014 E350 also restored: 1969 Camaro convertible SS 1957 Chevy Belair 2dr hardtop
My dealer says it should be replaced once a year, I can live with that. The wifes cadillac has the original battery in remote and it is 16 years old. But then again that is an american car. Just the engines and transmission go out and you have to replace them.
#13
Member
#15
MBWorld Fanatic!
Thread Starter
My old BMW had keyless start as well and I park and leave my keys at the same spot in my house, the BMW fob battery lasted over 2 years before it needed replacement.
#17
MBWorld Fanatic!
Thread Starter
#18
MBWorld Fanatic!
Join Date: Nov 2009
Location: Southeastern USA
Posts: 2,581
Received 145 Likes
on
103 Posts
2010 E350 Luxury Sedan, Engine 272 (V6)
Replaced it in fob I ordinarily use at four years because cheap to do. Ironically, the fob I almost never use has 7 year old battery that still works fine. Do not have keyless go.
My Nissan Rogue SUV has "keyless go" and battery only lasted 18 months.
My Nissan Rogue SUV has "keyless go" and battery only lasted 18 months.
#19
Junior Member
I'm not sure how long mine lasted, since I picked up a 2012 CPO nearly a year ago. One fob runs strong, the other's battery died on the morning commute a few months ago. There wasn't much notice, and I now keep a spare battery in the center console just in case.
-Adam
-Adam
#21
MBWorld Fanatic!
Had my W212 for 2 years and already done 3 replacements (although one was by dealer when there was no warning).
I had a Toyota with keyless (smart key) for 8 years and never needed to replace battery.
MB is just better at everything.
I had a Toyota with keyless (smart key) for 8 years and never needed to replace battery.
MB is just better at everything.
#22
Newbie
Join Date: Sep 2013
Location: Texas
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
E350-2014 Sport ,Honda 2001 Accord, FireBird-1992-Formula
I was getting 3-6 months on key fob batteries with KEYLESS-GO. Dealer said keep key fobs away from each other. If kept close to each other they talk to each other and run down.
(Forgot when this was.)
(Forgot when this was.)
#23
Super Member
Replace them more often.... I learned the hard way when I left my key in the car and it locked but would not open.... had to call roadside. Not a fond memory. Resulted in a "how to break into my own car" thread here last summer....
#24
MBWorld Fanatic!
#25
MBWorld Fanatic!
Thread Starter
Thanks, good to know, I will order some 2032. On paper, the CR2032 has 47% more capacity than the CR2025, 163 mAh vs 240 mAh.
Last edited by The G Man; 08-19-2016 at 09:49 AM.