Key Fob Battery

ahm

Registered User
About a month ago my car started telling me my key fob needs it's battery changing. Not sure if that's normal enough after 18 months from new but thought I'll just start using the 2nd key as it's never been used and my lease ends in May so I'll just use it till then. However after one month of using the 2nd key the same thing now, it apparently needs a new battery. Surely there's something else going on here, how could it run out of battery after a month?
 

cuke2u

Registered User
Our fiesta seems to eat fob batteries, yet my a4 is fine. Are you sure you aren't accidently pressing on one of the buttons when the car is out of range?
 

ahm

Registered User
Our fiesta seems to eat fob batteries, yet my a4 is fine. Are you sure you aren't accidently pressing on one of the buttons when the car is out of range?

I don't think so, I'm fairly careful ever since coming back to an open boot in Sainsbury's carpark not long after getting the car!!
 

RaZ A4

RaZ A4
Mine went the other day after 17 months but at £1.50 to fix no worries.
 

ahm

Registered User
Mine went the other day after 17 months but at £1.50 to fix no worries.

I'm assuming you just did it yourself and also assume it's easy to do? I've no issues doing it, just hoping it isn't something else wrong considering the 2nd key only seemed to last 1 month.
 

pierreluigi88

Registered User
I'm assuming you just did it yourself and also assume it's easy to do? I've no issues doing it, just hoping it isn't something else wrong considering the 2nd key only seemed to last 1 month.

I think If you've got keyless entry or keyless start, the fob is always giving off a signal so even if not used, your 2nd key will have been discharging the whole time.
 

RaZ A4

RaZ A4
I'm assuming you just did it yourself and also assume it's easy to do? I've no issues doing it, just hoping it isn't something else wrong considering the 2nd key only seemed to last 1 month.

Dead easy just followed YouTube video, took only a few minutes to do.
 

maui

Registered User
Mine complained at 14 months / 40k.
Exclusively use same key because of MMI customisation but does not seem unreasonable to me?


Sent from my iPhone using Tapatalk
 

st3v3

Registered User
same for me I had to change my battery in key fob 1 after 18 months then within a month I had to change the battery in key fob 2,as said the fob would be giving off a signal regardless if you use it or not.
 

ahm

Registered User
Thank you everybody for the replies. I've ordered the batteries off eBay and will replace then, good to know it's normal.
 

/dev/null

Registered User
One problem with the A4 keyfob I find (and my friend who also has an A4) is the buttons are easily pressed whilst in your pocket. I've had a few times where I've left the car, put my keys in my pocket, and the car has opened or the boot opened etc.
 

pagenotfound

Registered User
I seem to recall that at my first service the batteries were changed in my keys as a standard part of the service so not had any low battery issues but worth noting that even if the battery goes completely flat then it won't lose the coding. I've got 3 keys for mine and after a year and a half without a battery in my spare third one, it worked fine today once I put a fresh battery in it - including remembering the seat position and heater settings that were stored on the key.
 

cuke2u

Registered User
I seem to recall that at my first service the batteries were changed in my keys as a standard part of the service so not had any low battery issues.
Blimey that's a first, never once had fob batteries changed as part of a service...
 
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