car fob stopped working?

byviolet · 02-21-2018, 05:29 PM

Hopefully this is a simple/doable fix because I'm not super enthused about the idea of buying a whole new replacement key.

Today I noticed that the car fob is not working. This car fob doesn't have comfort access but it does have a rechargeable battery (which I replaced -- still doesn't work). If I use the manual key to unlock the door there's no alarm and if I put the fob into the car and press the start button the car will start. I have another car fob with comfort access which can unlock/lock the car normally without needing to use the manual key.

Any thoughts?

unrulyteach · 02-21-2018, 05:35 PM

Quote:

Originally Posted by byviolet

Hopefully this is a simple/doable fix because I'm not super enthused about the idea of buying a whole new replacement key.

Today I noticed that the car fob is not working. This car fob doesn't have comfort access but it does have a rechargeable battery (which I replaced -- still doesn't work). If I use the manual key to unlock the door there's no alarm and if I put the fob into the car and press the start button the car will start. I have another car fob with comfort access which can unlock/lock the car normally without needing to use the manual key.

Any thoughts?

So u hav conform access?

byviolet · 02-21-2018, 05:42 PM

Quote:

Originally Posted by unrulyteach

So u hav conform access?

there's 2 car fobs. one has comfort access and the other one doesn't.

unrulyteach · 02-21-2018, 05:43 PM

Quote:

Originally Posted by byviolet

Quote:

Originally Posted by unrulyteach

So u hav conform access?

there's 2 car fobs. one has comfort access and the other one doesn't.

Umm does the car hav comfort access?

byviolet · 02-21-2018, 05:53 PM

Quote:

Originally Posted by unrulyteach

Umm does the car hav comfort access?

yup!

unrulyteach · 02-21-2018, 05:54 PM

Quote:

Originally Posted by byviolet

Quote:

Originally Posted by unrulyteach

Umm does the car hav comfort access?

yup!

Why do u hav a key that doesn't hav comfort access

byviolet · 02-21-2018, 06:16 PM

Quote:

Originally Posted by unrulyteach

Why do u hav a key that doesn't hav comfort access

does it matter? I have a key that doesn't have comfort access, I don't know why.

unrulyteach · 02-21-2018, 08:21 PM

I'm just trying to understand. I mean as long as is programmed to the car it should start it like u said but idk if it will do all the other things just cause of that reason

byviolet · 02-22-2018, 01:15 AM

Quote:

Originally Posted by unrulyteach

I'm just trying to understand. I mean as long as is programmed to the car it should start it like u said but idk if it will do all the other things just cause of that reason

Oh I wasn't talking about comfort access not working, I'm saying things like unlocking the car/locking the car remotely isn't working whereas they used to. Any ideas?

unrulyteach · 02-22-2018, 11:23 AM

Quote:

Originally Posted by byviolet

Quote:

Originally Posted by unrulyteach

I'm just trying to understand. I mean as long as is programmed to the car it should start it like u said but idk if it will do all the other things just cause of that reason

Oh I wasn't talking about comfort access not working, I'm saying things like unlocking the car/locking the car remotely isn't working whereas they used to. Any ideas?

Could be the receiver/transmitter. What happens if u put it close to ur head or near a bottle of water?

dsjr2006 · 02-22-2018, 12:44 PM

Sounds like the key is bad, are you certain the battery is good and installed correctly? You could try have it re-registered, but starting the car only uses passive communication, while the keyless entry to lock/unlock requires actively transmitting to the vehicle. If it's not the battery, then the key is bad.

Upside is you wouldn't need a key cut, just programming.

byviolet · 02-22-2018, 05:34 PM

Quote:

Originally Posted by unrulyteach

Could be the receiver/transmitter. What happens if u put it close to ur head or near a bottle of water?

hey are you messing with me lol

anyways today it started working again -- not sure what's up with it but i'll take it .

unrulyteach · 02-22-2018, 05:50 PM

Quote:

Originally Posted by byviolet

Quote:

Originally Posted by unrulyteach

Could be the receiver/transmitter. What happens if u put it close to ur head or near a bottle of water?

hey are you messing with me lol

anyways today it started working again -- not sure what's up with it but i'll take it .

Lol ppl always ask me that. It really does work it amplifies the signal u should try it.

unrulyteach · 02-22-2018, 05:50 PM

Glad it's working tho

bpatrik · 08-04-2018, 10:38 AM

Hello!
My key fobs are also not working on my e91 even the manual key don't unlock/lock the car. Fortunately it starts the car. I think my central lock is ok, because when I get in and push the lock button on the dash, it locks/unlocks all the doors.
Anybody knows what could cause the problem? I really have no idea what to do now, I have to leave the car unlocked all the time :/

ptony101 · 08-04-2018, 01:57 PM

Quote:

Originally Posted by bpatrik

Hello!
My key fobs are also not working on my e91 even the manual key don't unlock/lock the car. Fortunately it starts the car. I think my central lock is ok, because when I get in and push the lock button on the dash, it locks/unlocks all the doors.
Anybody knows what could cause the problem? I really have no idea what to do now, I have to leave the car unlocked all the time :/

I posted this the other night on another thread about my non-CA FOB:

The remote didn't work (wouldn't unlock the door) but it would start the car. I opened it up (very carefully) and checked the battery. It had 3V on it so was good. I eventually found a guy that repairs BMW FOBs. He fixed it. Cost depends on whether or not you've already opened the key; ranges from $50 to 75. His website explains why. Not cheap but fair compared to a new FOB.

www.bmwgm5.com

bpatrik · 08-04-2018, 02:01 PM

Thanks for the tip, but I dont think the problem is with my key. My other key is also stopped working.
Even when I try the physical key it is not locking/unlocking.

02-21-2018, 05:29 PM	#1
byviolet New Member 0 Rep 14 Posts Drives: e92 Join Date: Nov 2016 Location: canada iTrader: (0)	car fob stopped working? Hopefully this is a simple/doable fix because I'm not super enthused about the idea of buying a whole new replacement key. Today I noticed that the car fob is not working. This car fob doesn't have comfort access but it does have a rechargeable battery (which I replaced -- still doesn't work). If I use the manual key to unlock the door there's no alarm and if I put the fob into the car and press the start button the car will start. I have another car fob with comfort access which can unlock/lock the car normally without needing to use the manual key. Any thoughts?
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02-21-2018, 08:21 PM	#8
unrulyteach Colonel 392 Rep 2,367 Posts Drives: 2011 335i Join Date: May 2016 Location: myrtle beach sc iTrader: (0) Garage List 2011 BMW 335i [0.00]	I'm just trying to understand. I mean as long as is programmed to the car it should start it like u said but idk if it will do all the other things just cause of that reason
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02-22-2018, 12:44 PM	#11
dsjr2006 Captain 157 Rep 848 Posts Drives: '01 E39 540iA, '09 E90 M3 Join Date: May 2013 Location: Metro Detroit iTrader: (1) Garage List 2010 BMW 335i [0.00] 2001 BMW 540i [0.00]	Sounds like the key is bad, are you certain the battery is good and installed correctly? You could try have it re-registered, but starting the car only uses passive communication, while the keyless entry to lock/unlock requires actively transmitting to the vehicle. If it's not the battery, then the key is bad. Upside is you wouldn't need a key cut, just programming. __________________ E90 M3 DCT LCI \| E90 LCI N54 M-Sport(retired) \| E90 Technical Docs download: http://j.mp/bmwe90docs *good read, very detailed.
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02-22-2018, 05:50 PM	#14
unrulyteach Colonel 392 Rep 2,367 Posts Drives: 2011 335i Join Date: May 2016 Location: myrtle beach sc iTrader: (0) Garage List 2011 BMW 335i [0.00]	Glad it's working tho
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08-04-2018, 10:38 AM	#15
bpatrik New Member 3 Rep 11 Posts Drives: E91 318d Join Date: Aug 2018 Location: Hungary iTrader: (0)	Hello! My key fobs are also not working on my e91 even the manual key don't unlock/lock the car. Fortunately it starts the car. I think my central lock is ok, because when I get in and push the lock button on the dash, it locks/unlocks all the doors. Anybody knows what could cause the problem? I really have no idea what to do now, I have to leave the car unlocked all the time :/
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08-04-2018, 02:01 PM	#17
bpatrik New Member 3 Rep 11 Posts Drives: E91 318d Join Date: Aug 2018 Location: Hungary iTrader: (0)	Thanks for the tip, but I dont think the problem is with my key. My other key is also stopped working. Even when I try the physical key it is not locking/unlocking.
	Appreciate 0 Quote