8

My 2004 VW Passat has an issue where the nearside rear door will not always open when the corresponding button is pressed on the car key. When the other doors are unlocked, the faulty door makes an unusual noise as if something is trying to move but can't. Apparently its quite common with VW cars of this age.

Has anyone had this problem? Does anyone know the most likely cause of this problem?

UPDATE

The rear nearside door now consistantly won't open, making replacing the door lock actuator (the part that is currently believed to be at fault) somewhat harder to replace.

  • I overcame this problem on my Bora by driving down the bumpiest road I could find whilst pressing repeatedly the lock then unlock buttons on the drivers console. I was lucky that the lock popped up and has worked since. Apparently they can sometimes get stuck. – Steve Matthews Sep 22 '16 at 11:29
7

The fact that you can hear some noise from the door with the inoperational lock is an indication that the wiring is fine.

There is a good chance that the door lock actuator has gone bad and needs to be replaced.

6

PROBLEM

As you can see in the photo, on the lock actuator replacement part for my car door there is a plastic part (left) and a metal part (right).

Lock Actuator The two parts, metal and plastic, are supposed to move as one unit. If the unit is rotated anti-clockwise then the door lock will be in the locked position. If the door is rotated clockwise then the door would be in the unlocked position. In my case when trying to push the lock in to the unlocked position, something inside the faulty lock was causing it to spring back in to the locked position.

The common fault that I encountered with the door lock was that the plastic part was moving but the metal part was not moving fully in to the unlocked position, hence the door would not unlock. I needed to buy this replacement part.

The problem with my door was that it would not unlock via any means, be it by the key, interior handle or drivers door unlock button.

door locked

HOW TO REPLACE THE DOOR LOCK ACTUATOR

The outer part of the plastic handle comes off relatively easily and once you've done that there are only three screws holding the interior trim on the car. There are two in the handle (as shown in the image below), and one right on the bottom of the panel.

door handle screws

To remove the interior trim, gently lever the panel using a large screwdriver from multiple points around the circumference of the panel to release the panel from the small plastic clips that are still holding the panel in place.

Once you have got the panel off the door, the door should look something like this:

door with interior trim removed At this point I recommend that you disconnect everything you can. All the electrics can be unclipped and the short grey rod can also be taken off.

Now you need to take out the plastic pin that holds the glass window in its slider. Once you've done this you will be able to lift the glass up out of its slider easily. We used duck tape to hold it in place. If the pin on yours is stiff, just push harder. We had to use a lot of force to get it out as it was a very snug fit but be patient and it will come out eventually.

Now you can use a 10mm socket to unscrew all of the bolts on the edge of the metal panel and you should be able to take it straight off. With the metal panel removed, you should finally have direct access to the lock. This is the part that we need to replace. It is still held in by two more bolts on the side of the door frame.

EXTRA STEP IF YOUR DOOR WON'T OPEN

If you're door is still shut, you will need to force the door to open by moving the faulty lock in to the unlock position. This is quite a strong part, but is doesn't matter if you break the plastic part off it (as seen in the first photo) because you are going to replace it with the new one anyway when you're finished.

Just lever the lock up from underneath, as you can see in the photo below.

door lock actuator to unlock position

With the door open, here is a view of what the door should look like with the metal panel removed and the a lock in place.

door panel with lock part visible

To remove the lock itself, there are another two screws holding it to the door. Unscrew these from the side of the door where the lock is situated, and it should then come straight out.

Now that your car door is open, you can fit the new lock in and put everything back together (which is literally just the exact reverse of assembly).

Now your central locking system should work as intended!

  • Excellent write up, it really helped me out. Thanks very much for doing this... I went through the steps and there was an extra task I had to do. If you look behind the door seal, you will find an access hole, this will give you access to a spline bolt. Loosen this off, and it should allow you to remove part of the door handle. (The bit that looks like a lock should be in there). Once removed, this gives you access to remove the cable from the door handle. The actuator can now be removed. :) – user36945 Apr 14 '18 at 14:34

protected by Community Apr 14 '18 at 16:27

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.