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Door Latch Replacement
 
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Pelican Technical Article:

Door Latch Replacement

Nick Czerula

Time:

1 hour1 hr

Tab:

$200

Talent:

**

Tools:

Plastic prying tool, Door panel clip tool, T30 Torx

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Parts Required:

Door latch

Hot Tip:

Tape body to avoid scratches

Performance Gain:

Door opens normally

Complementary Modification:

Lubricate and clean door latch

Central locking in BMW Z4 models controls the door locks, the luggage compartment lock and the fuel filler flap lock. The electronic functions of central locking are controlled through the general module and the door switches.

The lock mechanism in each door consists of a latch, an exterior door handle and an inside door lock release handle. Only the driver door (left front in North America) is equipped with a lock cylinder. The exterior door handle releases and unlocks the door latch via a cable inside the door. This will make the handle malfunction, usually feeling like you have to apply excess pressure on the handle. The lock cylinder can wear out over time and become stiff. If you want to replace the door lock or handle it can be done with the door panel installed. If you want to replace the door handle carrier or the latch, you will have to remove the door panel and window regulator.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

This tech article covers replacing the door latch on BMW Z4 models.
Figure 1

This tech article covers replacing the door latch on BMW Z4 models. Start by removing the door panel. See our tech article on door panel removing. After the door panel is removed, remove the airbag (red arrow) and vapor barrier (blue arrow).

To remove the airbag, unclip the electrical connector (red arrow) retainer using a small flathead screwdriver.
Figure 2

To remove the airbag, unclip the electrical connector (red arrow) retainer using a small flathead screwdriver. Then remove it (inset photos). Then remove the three 10mm airbag fasteners (blue arrows), and remove the airbag.

Remove the door vapor barrier (red arrow).
Figure 3

Remove the door vapor barrier (red arrow). When peeling the vapor barrier off, be careful not to tear it. If you do, replace it. Clean off and apply new butyl sealer (blue arrow) when reinstalling the new vapor barrier.

Working inside the door at the latch, pull the cable (red arrow) straight out of the mount.
Figure 4

Working inside the door at the latch, pull the cable (red arrow) straight out of the mount. Use a small hook pick (blue arrow). It helps to get a good grip on the cable ends.

Pull the lock rod (blue arrow) out of the door to remove it.
Figure 5

Pull the lock rod (blue arrow) out of the door to remove it.

Next, pull the door handle Bowden cable down to unclip it.
Figure 6

Next, pull the door handle Bowden cable down to unclip it. Then unhook the top from the lever (blue arrow) and remove it. Squeeze the door latch electrical connector (red arrow) tabs and remove the connector (inset).

Remove the three T30 Torx door latch fasteners (red arrows).
Figure 7

Remove the three T30 Torx door latch fasteners (red arrows).

Then remove the door latch (red arrow) from the door by rotating the bottom toward the door skin and feeding the top out of the lock cylinder rod (blue arrow).
Figure 8

Then remove the door latch (red arrow) from the door by rotating the bottom toward the door skin and feeding the top out of the lock cylinder rod (blue arrow).

To install the new latch reverse the order of the steps.
Figure 9

To install the new latch reverse the order of the steps. When installing the latch, align the lock cylinder rod (blue arrow) with the door latch (red arrow). If you are having trouble aligning the two, use the key in the lock cylinder to rotate the rod while installing the latch. I find this helps to get them to mate. Remember to check the function of the latch before installing the door panel. I suggest closing the latch with a flathead screwdriver while the door is open. Then open it using the cables once you have attached them. This will ensure it is working.



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Page last updated: Fri 12/2/2016 02:58:23 AM