I've read numerous posts about this but I cannot find anything that gives a straight answer.

My sigma key fob (separate to the key) has been struggling to lock and unlock my car and the 3 little LED lines at the bottom of the key fob flash red (i'm pretty sure they used to be green).

When I come to change the battery over, is there a way to do it so that it still is sync'd to the car? I've read loads of posts of people saying it is no longer sync'd and they need to get the fob reprogrammed to the car but then have issues getting it sync'd.

Thanks

 

this is the key fob I have...
http://www.southerncarsecurity.co.uk...&product_id=97

 

I have changed the key fob battery a couple of times over the years,with no problem. My05sti

 

Oh great, do you know what battery is required?

 

is it a CR1620?

 

Can look when I get home. (If no one else can confirm this)

 

Cheers mate

 

just take the back of your fob and look what code is stamped on the existing battery

 

That is the obvious option however I don't know how the battery is held in, I'm a long way from home so don't want the battery to fall out and then not be able to sync my car etc if that does happen.

I'll have to look when home!

 

Home now, the battery is cr1620 had to remove it to see removed / refitted all still ok

But we have different fobs mine is built in to the key. my05sti

 

Spot on, thank you! I will do this tomorrow when I get a battery!

 

I did not see your link until I got home.

 

Changed the battery and all is good, I do still however have to be almost next to the car for it to unlock!

 

put it to your chin

 

Ha whilst this method might work, I think instead of looking like a tit I will just walk closer