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What happens when key fob battery goes flat

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Car is over three years old

Inevitably the key fob battery will fail in due course and I won't be able to open up.

What do I do then please?

Why not replace the battery now rather than wait on it to fail. If it does fail have you not got a key lock on the drivers door, not sure about Superb, it might be under a cover.

Correct me if wrong but it is a fairly easy task to replace the battery (cr2032?)and you can still open doors etc with the key but not remotely. The engine should still read the key code.

Our Leon is 11 years old an on the original battery. My old Octavia was still working after 10.

I wouldn't worry too much.

Sent from my Nexus 4 using Tapatalk

  • Author

Thanks

I've read on several occasions that when you change the battery in a key fob you have  to do it quite quickly, have everything unpacked and ready, then out with the old and in with the new, or it forgets the code. Did it OK on my previous car with no problems.

Car is over three years old

Inevitably the key fob battery will fail in due course and I won't be able to open up.

What do I do then please?

RTFM!

RTFM!

So long as you haven't left it in the car.............;)

I meant he should read his manual instead of asking it on this forum.

BTW: It is possible to download the manual as pdf. If you put it on your phone, you always have it (easy searchable) with you.

Edited by andrehj

I'd wait for it to actually be a problem. 10 years is not unusual for these remote controls. I never had to replace the battery on my last car before selling it at 9 years old. A friend of mine preemptively changed the battery in his car remote and the replacement went flat 3 days later though... 

 

To open the car without the remote, lever the part of the driver's door handle nearest the door edge off (If you look under you'll see a slot, which the key fits in to lever it with) and use the key in the keyhole you uncover. The immobiliser chip is read by the car without the key fob powering it.

  • Author

Thanks for the additional replies.

I'd wait for it to actually be a problem. 10 years is not unusual for these remote controls. I never had to replace the battery on my last car before selling it at 9 years old. A friend of mine preemptively changed the battery in his car remote and the replacement went flat 3 days later though...

Not if you have Kessy. I had to replace both my batteries after a little over 2 years.

  • 3 years later...
On 09/11/2014 at 01:19, Camberley_Chris said:

I've read on several occasions that when you change the battery in a key fob you have  to do it quite quickly, have everything unpacked and ready, then out with the old and in with the new, or it forgets the code. Did it OK on my previous car with no problems.

 

I changed mine and I don't have to do a re-sync.

My old battery was 2.9V but was enough to create intermittent problems with KESSY.

 

Changing to a new battery fixed all the issues.

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