Question about 2003 Volkswagen Passat

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Keys work to lock doors and unlock the trunk but will not remotely unlock the doors, so we have ruled out battery issues, tried reprogramming the keys...what next?

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I recently called the Volkswagen Dealership and spoke with the service manager about why my passenger doors no longer unlock using either of my two remotes...but all doors do unlock using the key in the exterior door lock, and by using the driver door master control switch. Note: The remotes are new, have been programmed by the dealership, and have fresh batteries in them. The VW service manager said "it sounds like the control module has a bad circuit". The fix would be a new control module, parts and 2 hours labor would be about $530.00. I mentioned that my original car battery is over eight years old and weak and needs to be replaced, and asked if that could be the problem. He said "NO that a weak battery wouldn't cause only that one single lock malfunction".

My husband went to the local auto parts store today and purchased a new battery for the car and installed it himself. Cost was just under $190.00 w/tax for the battery, but we purchased the top of the line "Interstate" battery. THIS FIXED THE PROBLEM! The remote problem is gone! All doors will lock and unlock as they did when the car was new! I'm happy to share the good news with everyone out there who may be experiencing the same problem. If your battery could be weak, try replacing it first before spending money on a new module. Cheers!

Posted on Apr 28, 2012

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Sit inside the car manually lock all doors then with the fob arm it and then unlock it, sometimes this works, if not then disconnect the battery but if you do make sure you have the code for your radio and know how to enter it. Good Luck Tim

Posted on May 28, 2011

  • tealjulie123 May 28, 2011

    I tried the first part...sat inside the car, manually locked the doors...that didn't work. You lost me at disconnect the battery, code for radio...That may be beyond my technical abilities. Thank you for the help, though.

  • Tim Whalen May 28, 2011

    when the battery is disconnected the radio has an anti-theft on it and when power is applied the radio has to be unlocked with a code, this is if it is a factory radio. Tim

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try programming the remote again, here is how u do that. if this doesn't fix the problem the remote may be defective, if you need a new one try ebay, they are very cheap to buy there.

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Note: Existing keyless remotes will be erased with this procedure.
Existing working remotes will have to reprogrammed also.
1. Locate the programming connector wire located in the RH trunk area.
You may have to pull back right side trunk trim on trunk wall to locate
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2. The programming connector wire should have one termial in the plastic
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I hope you're able to get into your car because it sounds like the system needs to be reprogrammed.

1-insert and remove key from ignition two times

2-close and open driver door two times

3-insert and remove key once from ign.

4-close and open drvr door twice

5-insert key into ign.,then close driver door

6-turn key to on (not start) then off, twice this is rewrite mode,have all remotes to reprogram it will clear any lost remotes.

7-remove key from ignition,the door locks should cycle twice.if not start over.it may take a few tries.

8-press lock/unlock together and hold for a second

9-release,and press lock on remote,the door locks will cycle confirming program.continue to do other remotes you have,steps 8 and 9.if only one in possession,you are done. To end mode open door or insert key into ignition.

You'll need to follow the steps with no more than a 1-2 second delay between each step.. hope it works

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