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Key wont open the car but will lock it!

Discussion in 'A3/S3/Sportback (8P Chassis)' started by briniuk, Dec 20, 2013.

  1. briniuk
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    briniuk Member

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    [Dec 20, 2013]
    I have a S3 8p 2011 sportback with 1 key - it has been alright until yesterday when I go to open the car from the key but it doesn't work! but it will lock the car and the boot button works too, do I need to sync some how?
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  2. hollow
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    hollow Active Member

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    [Dec 20, 2013]
    dodgy button on remote ?? or are you manually opening car with the key in the lock ? broken micro switch maybe
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  3. craigynett
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    craigynett Member

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    [Dec 20, 2013]
    sounds like you've got a faulty microswitch on your remote. Can you feel it click when you press the unlock button? new microswitches are easily soldered on to the PCB. I've done a fair few
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  4. briniuk
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    briniuk Member

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    [Dec 21, 2013]
    it clicks and sounds the same as the lock button. How much are these switches?

    I have to manually put the key in the lock to open
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  5. JohnE
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    JohnE 2005 A3 Sport 1.6 FSI

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    [Dec 21, 2013]
    There's a wee light on my key that flashes when you press the button - dunno if they have that on later ones - you could see if it flashes when you press each button....
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  6. vw754
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    vw754 vorsprung Durch Technik

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    [Dec 21, 2013]
    take it apart,normally the metal contact inside is not connecting when you press the button,open it and bend the metal tabs upwards.
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  7. briniuk
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    briniuk Member

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    [Dec 21, 2013]
    The light doesn't flash when I click the open but does with the close and boot.

    I shall try opening the key If its that simple id be happy
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  8. briniuk
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    briniuk Member

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    [Dec 21, 2013]
    tried to search the web is there a easy way to get in to the key?
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  9. vw754
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    vw754 vorsprung Durch Technik

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    [Dec 21, 2013]
    take battery cover off,remove tiny screws and ya there

    bit hard but they do split.
    Last edited: Dec 21, 2013
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  10. Stiggles
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    Stiggles Top Gear!

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    [Dec 21, 2013]
    Its the battery, I had the same issue not long ago.

    Swap out the battery for a new one and you'll be fine!

    The Key splits in 2 by inserting a flat head into the slot on the back, then prise it open along the crease which should reveal the battery
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  11. craigynett
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    craigynett Member

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    [Dec 21, 2013]
    they're usually a few quid off Ebay. You need to open the case to see which type of micro switch are mounted on the PCB. They'll either 2 or 4 solder points on each switch
    #11
  12. craigynett
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    craigynett Member

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    [Dec 21, 2013]
    surely if the battery was faulty the lock & boot buttons wouldn't work. Also he's got a different style remote to you. To change the battery in the newer style all you do is pop off the rear cover
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  13. Stiggles
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    Stiggles Top Gear!

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    [Dec 21, 2013]
    I thought that myself, but I think there must be something with the wiring where it reserves enough to lock and open the boot, I had the exact issue with my key, boot opened doors locked but wouldn't open with fob

    Had to open with key in door, then if i didn't start the ignition quick enough the alarm would go off.

    It may well be something else, but might aswell try the battery as I swapped mine and its fixed it.
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  14. Boon
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    Boon Active Member VCDS Map User

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    [Dec 21, 2013]
    I'd start with the battery too, then move on to testing the micro switches and other possible issues (signal tests, pairing etc) if that doesn't resolve it
    #14
  15. briniuk
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    briniuk Member

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    [Dec 21, 2013]
    Ok tried the battery so that's my expertise reached, onto the next solution
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  16. @udi A3
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    @udi A3 Site Sponsor Site Sponsor VCDS Map User

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    [Dec 21, 2013]
    As craig said, look at micro switches. Also you'd do well to get a spare key.
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  17. hollow
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    hollow Active Member

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  18. briniuk
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    briniuk Member

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    [Dec 22, 2013]
    Thanks for the link - my key isn't the 1 in the pic on that eBay link its the a3/s3 key does that matter?

    How much do you guys reckon a garage would charge to repair this if I didn't want to repair myself?
    #18
  19. craigynett
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    craigynett Member

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    [Dec 22, 2013]
    where are you based? if i'm out & about with work & near you at some point I could take a look at it. Most garages won't repair remotes
    #19

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