[schneeky]

I have had to replace the batter in my key fob on 3 occasions in 6 months. The dealer says there is no fault? Anybody else experience the same?

[northernmonkey]

Originally Posted by schneeky

I have had to replace the batter in my key fob on 3 occasions in 6 months. The dealer says there is no fault? Anybody else experience the same?

That sounds very abnormal to me.

Once very 2 months? Your dealer must be smoking something or you sit on the key all day everyday accidentally pressing the buttons.

[raleedy]

How's the other fob doing?

[SpawneyGet]

Originally Posted by northernmonkey

That sounds very abnormal to me.

Once very 2 months? Your dealer must be smoking something or you sit on the key all day everyday accidentally pressing the buttons.

+1

[ipso_facto]

It sounds abnormal to me too. I was thinking the other day that the button press to open the boot (F10) is quite long - may be one to two seconds press. I think that this is going to mean much shorter frequency of battery replacement in the fob.

Since the boot open by hand is not very nice, I use the fob all the time.

[Jon D]

Originally Posted by ipso_facto

It sounds abnormal to me too. I was thinking the other day that the button press to open the boot (F10) is quite long - may be one to two seconds press. I think that this is going to mean much shorter frequency of battery replacement in the fob.

Since the boot open by hand is not very nice, I use the fob all the time.

I just about always open the boot with the fob, which is now over 6 months old with no sign of a weak battery.
'Shneeky', I agree that 3 replacements in 6 months sounds wildly excessive and there might be a fault with the fob - have you tried using the other one instead?

[raleedy]

Originally Posted by ipso_facto

It sounds abnormal to me too. I was thinking the other day that the button press to open the boot (F10) is quite long - may be one to two seconds press. I think that this is going to mean much shorter frequency of battery replacement in the fob.

Since the boot open by hand is not very nice, I use the fob all the time.

There's a good reason for the long press to open the trunk.

[BestManWins]

I was told by my dealer's technical manager that the battery in the fob usually last between 1 to 2 years.

If what he said is true, then having the battery changed 3 times in 6 months would be excessive.

Did you take Jon D's suggestion of trying out the other fob?

[schneeky]

Car is due in at the dealer for a service in 2000 miles will ask again. Thanks for the input

[Autojack]

schneeky -

I have owned several bmws with key fobs, and the internal battery should last a few years - not a few months. Suggest you change dealers because yours is either misinformed or dishonest.

[pacecapt]

I am having the same problem with both Fobs. The batteries have died twice in both over the past year. The Dealer told me it had something to do with the fob communicating with the car whenever it is in range. I don't buy that and believe there is a problem.

[schneeky]

Newer resolved mine. 1 fob is fine, the other is useless - Dealer likewise...

[E90Fleet]

Some FOB Batteries were defective


From another forum:

SI B66 10 09

SUBJECT
Radio Remote Control is Inoperative

MODEL
F01, F02 (7 Series)
F07 (5 Series Gran Turismo)
F10 (5 Series)

Vehicles produced from SOP to 09/01/2010


SITUATION
The radio remote control function is inoperative:

The vehicle cannot be unlocked or locked with the remote key.

The check control message “Replace Remote Control Battery” is displayed.

Fault Code “9308B0 – ID transmitter: Battery undervoltage” is stored.

Note: This does not affect the Comfort Access functions.

CAUSE
The radio remote control key or the battery in the remote control key is defective.

CORRECTION
Perform diagnosis using ISTA (Integrated Service Technical Application). Complete any test plans related to the radio remote control system.

When other causes (e.g., defective antenna amplifier or CAS) can be ruled out, replace either the remote control key or the battery of the remote control key, as outlined below.

Note: Damaged keys are not a warranty or program issue. Also, please confirm whether one or both of the radio remote control keys were previously replaced.

A. Vehicles produced from SOP to August 31st, 2009:

Replace the remote control key (without slide-in key).

Note: If the remote’s slide-in (metal) key works properly in the vehicle’s mechanical locks, swap the existing slide-in key into the new replacement remote control(s).

B. Vehicles produced from September 1st, 2009 to September 2nd, 2010:

Replace the remote control key (without slide-in key).