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Trunk Lock Cylinder and Latch Replacement
 
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Pelican Technical Article:

Trunk Lock Cylinder and Latch Replacement

Nick Czerula

Time:

1 hour1 hr

Tab:

$200

Talent:

***

Tools:

T25, T30 Torx drivers, trim panel tool, small flathead screwdriver

Applicable Models:

BMW E60 5-Series (2004-10)

Parts Required:

Trunk latch, trunk lock cylinder

Hot Tip:

Check trunk latch and button operation before closing trunk

Performance Gain:

Repair broken trunk release button or solenoid

Complementary Modification:

Replace trunk latch

The trunk lock is electrically networked with the central locking system. The trunk lock cylinder and the driver door lock cylinder are the external mechanical means for switching off the alarm system and unlocking the vehicle. The trunk lock cylinder and latch work in conjunction via cables and electrical switches to open your BMW E60 trunk.

The lock cylinder tumbler can wear out or become corroded. The more common issue is the latch itself failing, not holding the trunk shut or the trunk lid rattling. The lock cylinder is equipped with a microswitch that is not serviceable separately. This microswitch sends a ground signal to the Car Access System when the lock cylinder is rotated. Once the latch or lock cylinder is removed, you can replace the cables between the two if needed. Just detach the cables at each end. Then feed it out of the trunk lid and install the new one.

Remember that your car may have been serviced before and had parts 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.

Start by removing the emergency trunk release handle from the trunk lid (red arrow).
Figure 1

Start by removing the emergency trunk release handle from the trunk lid (red arrow). Then press the plastic tab and remove the cable from the handle (inset).

Then, remove the two Phillips head screws (red arrows) from the tool kit.
Figure 2

Then, remove the two Phillips head screws (red arrows) from the tool kit. Then unlock (green arrow) the tool kit and open the door. Support the door while you detach the door strap from the trunk lid (inset). Using a trim panel tool, lever out the center pin on the plastic rivets (yellow arrows) on the trunk carpet trim.

Then pull the carpet trim (red arrow) down and feed the emergency release cable through the trim (yellow arrow).
Figure 3

Then pull the carpet trim (red arrow) down and feed the emergency release cable through the trim (yellow arrow). Then support the carpet trim while you disconnect the trunk light. Pull the electrical connector (green arrow) straight out to remove it.

Lock cylinder: 
Lock cylinder: Next, disconnect the lock cylinder electrical connector (red arrow) by pulling it straight out.
Figure 4

Lock cylinder: Next, disconnect the lock cylinder electrical connector (red arrow) by pulling it straight out.

Lock cylinder: Using a small flathead screwdriver, lever out the cable retaining tabs.
Figure 5

Lock cylinder: Using a small flathead screwdriver, lever out the cable retaining tabs.

Lock cylinder: Then pull the cable mount out of the lock cylinder, by detaching the cable end from the lever (red arrow).
Figure 6

Lock cylinder: Then pull the cable mount out of the lock cylinder, by detaching the cable end from the lever (red arrow).

Lock cylinder: Remove the two T25 Torx trunk lock cylinder fasteners (red arrows).
Figure 7

Lock cylinder: Remove the two T25 Torx trunk lock cylinder fasteners (red arrows).

Lock cylinder: The lock cylinder is mounted via integrated threaded bores (red arrows) that slide behind the trunk sheet metal.
Figure 8

Lock cylinder: The lock cylinder is mounted via integrated threaded bores (red arrows) that slide behind the trunk sheet metal. To remove the lock cylinder, rotate the lock cylinder 45 degrees clockwise and pull it down to remove it. To install, reverse the removal steps. Be sure to check the operation of the trunk latch and lock before closing the trunk. Use a flathead screwdriver to lock the latch (with trunk open). Then unlock it using the key and trunk release handle.

Latch:
Latch: To replace the latch, remove the three T30 Torx fasteners (red arrows).
Figure 9

Latch: To replace the latch, remove the three T30 Torx fasteners (red arrows).

Latch: Then, pull the latch out just enough to access the electrical connector.
Figure 10

Latch: Then, pull the latch out just enough to access the electrical connector. Disconnect the electrical connector (red arrow) by pulling it straight out of the latch.

Latch: Pull the latch further out of the trunk lid.
Figure 11

Latch: Pull the latch further out of the trunk lid. Use a small flathead screwdriver to lever out the plastic center pin (red arrow). This center pin can be tough to get out. At times it is stuck and doesn't want to budge. Be careful not to poke yourself while levering it out. I also find when it is stuck, using a small trim panel tool can get a good bite on it to lever it out. Once out, lever out the cable end from the latch (inset).

Latch: Slide the cables out of the latch and remove the latch from the vehicle.
Figure 12

Latch: Slide the cables out of the latch and remove the latch from the vehicle. To install, reverse the removal steps. Be sure to check the operation of the trunk latch and lock before closing the trunk. Use a flathead screwdriver to lock the latch (with trunk open). Then unlock it using the key and trunk release handle.

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Comments and Suggestions:
Armand Comments: I have a 2004 BMW 530i and I have a problem opening the trunk using my remote and also the button switch.. I can only open it using my key. The button switch though is from time to time works but most of the time it is not working. what could be the problem with my trunk lock?

October 23, 2016
  Followup from the Pelican Staff: The latch is likely faulty.

Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
jackjiang Comments: thanks Nick for reply. how to command switch open? any instruction? there are 3 position from the latch: 1 close can be open use the key; 2 open can latch to close; and 3 open cannot latch to close. when the electrical cable is connect, the latch is always stay position 3 and trunk cannot be close. without cable connected, trunk stay in position 1 and 2, close/open works using key manually
August 4, 2016
  Followup from the Pelican Staff: I don't have the wiring for your vehicle. You will have to grab a wiring diagram, then check which terminals are for the open button. - Nick at Pelican Parts  
jackjiang Comments: Mine is 2006 BMW 525i truck cannot be closed either manually use key or electrically truck button and remote. I managed to replace a new latch. I can close latch manually only when I disconnect electrical cable. If I connect cable, the truck cannot be close. What could be wrong?
July 30, 2016
  Followup from the Pelican Staff: The switch circuit for opening may be stuck in the open position, Commanding the switch open. - Nick at Pelican Parts  
Fish Comments: Hello, i've a problem with the trunk on my E60 05/2006. It's impossible to open with remote key or with the the switch near the pedals. So i opened it manually with the key. The problem is that now is very difficult to close. I can close one time and then i try for many times and it stay open. I check the wiring and it seems good, so I check voltage on the 4 pin connector of the trunk lock and in the yellow one I see that when i push the switch on the remote key, there is a little voltage for 2 seconds. I think that the problem is the lock. Do you agree? Can i check something else?
May 7, 2016
  Followup from the Pelican Staff: It sounds like the latch is faulty. Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
Max M Comments: E60 2007. Hi! I put some stuff to the trunk and drive 10 minutes, ignoring 'Trunk open' alarm. After emptying and closing the trunk, everything came to normal. Same day, after driving and parking in another shop, the trunk is not opened by Remote Control. From the 4th attempt the Lock Latch was released manually, by the key. Now the next trouble: When the wiring is connected energised the strange electro-mechanical sound hearing and the latch doesn't close.. Trunk door is opening
I disconnect wire from the Latch to have possibility lock and drive to home.
Can be mechanical damage in the Latch? If there some one solenoid inside energised in open position? After disconnecting wire from Latch alarms : 'Trunk open' and 'No side light' appear.
Shall I check Latch condition? reset computer? Thanks
April 26, 2016
  Followup from the Pelican Staff: I would assume the latch is faulty. I would replace it. To check it, leave trunk open, shut latch using a screwdriver, then try to electronically release it. - Nick at Pelican Parts  
Bimmer535i Comments: Will the trunk key hole cylinder work for all e60 models or does the 535i e60 have its own key hole?
April 2, 2016
  Followup from the Pelican Staff: If you have the year range mentioned, it should be similar. - Nick at Pelican Parts  
mark Comments: hi i have a 2004 530i, i recently purchased the vehicle and the owner said the latch was sticking, he unpluged the latch and it would work manually, recently the lock cylinder stopped working as well, so i cannot open the trunk at all, i cannot gain access into the trunk since it doesnt have a split seat or a pass through, at this point im wondering if i need to drill out the key cylinder and gain access to the cable and pull it open that way, of course then i would need a second key to just open the truck, and suggestions
March 11, 2016
  Followup from the Pelican Staff: This is tough, as with the lock electrically unplugged and the lock cylinder faulty, your only option may be the break into the trunk, via drilling or even worse, damaging the trunk lid.

First I would try lubricating and cleaning the lock, trying another key, etc. Give it a chance before drilling. The only issue with drilling, is you still only have the small hole to work through. Your are better off trying to the the lock cylinder to turn, even if you have to force it. So the rear of it rotates, opening the latch. - Nick at Pelican Parts
 
stitol Comments: Hi i have the sam problem as zulphie, but I replaced the latch and the problem is still there. What can it be?
February 9, 2016
  Followup from the Pelican Staff: Could be jammed linkage or wiring issue. Check latch operation using a BMW scan tool. - Nick at Pelican Parts  
zulphie Comments: My 2004 BMW 530i trunk was working with trunk button; and with the remote key sometime working, sometime not working. Few days ago it was not opening with remote and I opened it manually with the key and tried to close it but could not close. Still in open condition. If I disconnect electrical cable from the latch, and push with the flat head screw driver then latch locks and open with the emergency handle. But when I attach electrical cable to latch, latch does not close with flat head screw driver. What is wrong? Latch or Cylinder ? Now nothing works, trunk button, and not with key manually turning to the right. Another thing, when I turn key to the right there is friction and key does not come back to left automatically. Please help.
October 18, 2015
  Followup from the Pelican Staff: I would guess the issue is with the latch. - Nick at Pelican Parts  
DLE Comments: I have the same problem as kush. I am not sure how the trunk latch can move unless it is bent, but if it can is there an adjustment to move it back in place?
October 8, 2015
  Followup from the Pelican Staff: The latch may be worn, allowing enough movement when closed to trigger the light. - Nick at Pelican Parts  
kush Comments: yes, it opens from the trunk button as well as the key.. i intermittently i get a light on my dash when i'm driving down the road that says my trunk is open.. and it is NOT!
also, my alarm won't work either?
August 28, 2015
  Followup from the Pelican Staff: The latch is probably faulty. - Nick at Pelican Parts  
kush Comments: my 2004 bmw 545i trunk sensor light keeps appearing on my dashboard.. i forced too much luggage into my trunk and tried to shut the lid. now the ligth comes on intermit.

also, my alarm will not arm?
suggestions?
August 22, 2015
  Followup from the Pelican Staff: Check if the trunk latch moved from jamming the lid won. If so, it may not be closing all the way, leaving the trunk switch open. - Nick at Pelican Parts  
nima Comments: MY 2004 bmw 530i trunk dosen't open by remote control
how can i fix it? do I need actuator or what?
with great thanks
March 10, 2015
  Followup from the Pelican Staff: Does it open from the trunk button? Do you have second key to try? - Nick at Pelican Parts  

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Page last updated: Fri 12/9/2016 02:43:12 AM