I have had a mk3 Octavia for about a month now. It has 2 keys, one won't unlock the car but will start it and the other will unlock and start the car.

I can't see a key slot on the door and am concerned that if the only fob that will open the car stops opening it I'm stuffed.

Do I just change the battery in the working fob and hope for the best or is there a procedure to follow?

Thanks for any help,

Paul

Read the Manual?

When I bought my car, one of the keys wouldn't open the door. I changed the battery, but it still didn't work.

I then read the manual (see above) and there is a procedure to re-sync the key to the car. There is a key slot in the door, but it is hidden under a cover. You need to put the key in it to re-sync IIRC.

Edited 21 February21 Feb by daveo138
added words

Hi Paul,

There is a cover over the lock on the driver's side door. It needs to be removed before you can unlock the door with the key.

Just replace the battery in the remote (CR2025), but get a decent make rather than a cheap one off the internet. I use Varta, but Duracell etc. should be fine.

Stuart

27 minutes ago, Cairus said:

Read the Manual?

Reading the manual about resyncing keys is, IMO, about as much use as an ashtray on a motorbike as I've found myself only yesterday.

I never have to resync the Keys. 4 MQB Cars at Home

1 hour ago, Lee01 said:

Reading the manual about resyncing keys is, IMO, about as much use as an ashtray on a motorbike as I've found myself only yesterday.

Worked for me 🤷🏻‍♂️