Internal boot release button retrofit

SSF · Post by **SSF** » Fri Nov 18, 2022 10:36 am

I understand the missing internal boot release button is a "feature" of all European E89s, and I'd like to correct this. Can anyone tell me the (at least approximate) procedure? I have the place for the button (a nice depression where it shoud be, probably covered by a cap), so I guess I need the button itself (61319200316, if I understand correctly) and maybe some wiring (or is it already there)? Is the wiring somethig I shoud buy, or is it something simple I can make by myself? Is it difficult to wire, like a DIY job? I'm not experienced at fiddling with cars, but maybe this part is not more compicated than computers, which I have assembled and repaired a lot of?

Thanks in advance!

wanderer · Post by **wanderer** » Fri Nov 18, 2022 10:41 am

This is an interesting one.
Is it an electronic release or mechanical (i.e. Pull to release).
A mechanical release would make more sense in case of emergency.

It's something that I've been thinking about as well.

AnubisZed · Post by **AnubisZed** » Fri Nov 18, 2022 11:05 am

Here is the wiring diagram for the boot release button...

obewan · Post by **obewan** » Fri Nov 18, 2022 11:07 am

Looks like it can be done easily enough

viewtopic.php?p=1432953#p1432953

obewan · Post by **obewan** » Fri Nov 18, 2022 11:09 am

Switch part number appears correct
viewtopic.php?p=1813224&hilit=internal+ ... e#p1813224

AnubisZed · Post by **AnubisZed** » Fri Nov 18, 2022 11:19 am

AnubisZed wrote: ↑Fri Nov 18, 2022 11:05 am Here is the wiring diagram for the boot release button...

Sorry forgot this bit...

B21 · Post by **B21** » Fri Nov 18, 2022 12:11 pm

I assume this doesn't get around the problem of a failed normal boot release mechanism in any way?

AnubisZed · Post by **AnubisZed** » Fri Nov 18, 2022 12:37 pm

B21 wrote: ↑Fri Nov 18, 2022 12:11 pm I assume this doesn't get around the problem of a failed normal boot release mechanism in any way?

No it doesn't

B21 · Post by **B21** » Fri Nov 18, 2022 1:14 pm

AnubisZed wrote: ↑Fri Nov 18, 2022 12:37 pm
B21 wrote: ↑Fri Nov 18, 2022 12:11 pm I assume this doesn't get around the problem of a failed normal boot release mechanism in any way?
No it doesn't

Ah well..just need to make sure I have you and Robbi on speed dial!

Smartbear · Post by **Smartbear** » Fri Nov 18, 2022 6:04 pm

B21 wrote: ↑Fri Nov 18, 2022 1:14 pm
AnubisZed wrote: ↑Fri Nov 18, 2022 12:37 pm
B21 wrote: ↑Fri Nov 18, 2022 12:11 pm I assume this doesn't get around the problem of a failed normal boot release mechanism in any way?
No it doesn't
Ah well..just need to make sure I have you and Robbi on speed dial!

Here you go

: 0E5A0294-1375-4555-9E0F-D4C0F71681B1.jpeg (125.52 KiB) Viewed 685 times

: 14CA9649-BBC8-4C0C-868C-44B925FEA5A5.png (619.82 KiB) Viewed 685 times

: 088D5F91-8409-473C-AC72-FF4BBD73450B.jpeg (88.97 KiB) Viewed 685 times

Rob

flybobbie · Post by **flybobbie** » Fri Nov 18, 2022 6:39 pm

Well if you do my mod, you can open the boot with roof in any position. You could fit a switch in that blank to do the job.
viewtopic.php?t=136430

RobbiZ4 · Post by **RobbiZ4** » Sun Nov 20, 2022 11:07 am

SSF wrote: ↑Fri Nov 18, 2022 10:36 am I understand the missing internal boot release button is a "feature" of all European E89s, and I'd like to correct this.

AFAIK it is not. Even my full equipped German E89 lacks of this button.
And I've stopped retrofitting it years ago when I realized, that even the driver seat has to be taken out of the car to get access to the internal ground connector below a styrol plate on the floor.

RobbiZ4 · Post by **RobbiZ4** » Sun Nov 20, 2022 11:18 am

B21 wrote: ↑Fri Nov 18, 2022 12:11 pm I assume this doesn't get around the problem of a failed normal boot release mechanism in any way?

It's a bit different.
Yes, the central(!) locking motor will be started by connecting pin12 to +12V. This is always sufficient to open the trunk lid, even if the roof stucks in any position.

But(1), this motor has to be technically ok and connected to the wiring loom.

But(2), till now I've never seen or heard of a non-working central motor. From my experience, the pin12 method is always sufficient, no additional wire/cable is required on the boot locking system. It takes only a max. of 3 minutes to get access to pin12 with the help of a simple screwdriver.

B21 · Post by **B21** » Sun Nov 20, 2022 12:34 pm

RobbiZ4 wrote: ↑Sun Nov 20, 2022 11:18 am
B21 wrote: ↑Fri Nov 18, 2022 12:11 pm I assume this doesn't get around the problem of a failed normal boot release mechanism in any way?
It's a bit different.
Yes, the central(!) locking motor will be started by connecting pin12 to +12V. This is always sufficient to open the trunk lid, even if the roof stucks in any position.

But(1), this motor has to be technically ok and connected to the wiring loom.

But(2), till now I've never seen or heard of a non-working central motor. From my experience, the pin12 method is always sufficient, no additional wire/cable is required on the boot locking system. It takes only a max. of 3 minutes to get access to pin12 with the help of a simple screwdriver.

Splendid..thanks for the clarification and expansion..

Stevo1987 · Post by **Stevo1987** » Mon Nov 21, 2022 12:28 pm

I need to do this as boot is locked

Z4-forum.com

Z4-forum.com