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      01-02-2019, 03:21 PM   #1
Mach550
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Lost trunk kick function with diffuser

It seems like ever since I unplugged the system to install a rear diffuser I have lost the kick function. I ensured that everything is plugged in correctly but I still can't get the kick to work. Are there issues with unplugging certain items while the car is unlocked? Physically there isn't much of a difference between where the system was in the OEM position and the new diffuser position. Also not sure if I should unplug the batteries for a couple minutes to clear out whatever bugs are lingering, this cars electronics make me worry about unplugging the battery.

Last edited by Mach550; 01-02-2019 at 03:26 PM.
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      01-02-2019, 07:53 PM   #2
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Originally Posted by Mach550 View Post
It seems like ever since I unplugged the system to install a rear diffuser I have lost the kick function. I ensured that everything is plugged in correctly but I still can't get the kick to work. Are there issues with unplugging certain items while the car is unlocked? Physically there isn't much of a difference between where the system was in the OEM position and the new diffuser position. Also not sure if I should unplug the batteries for a couple minutes to clear out whatever bugs are lingering, this cars electronics make me worry about unplugging the battery.
I've done a lot of research on this. I've talked with a BMW service Foreman and no one can seem to tell me why but installing a rear diffuser disables the kick trunk function.

This is true for the bmw m Performance diffuser and other 3rd party diffusers.

All I can find out is that it happens but not why it how to prevent it from happening.

That's why I decided to wrap the gray part of the rear bumper instead of installing a diffuser. It looks really good (not quite as good as a nice diffuser) and the kick trunk function works.
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      01-02-2019, 08:45 PM   #3
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Quote:
Originally Posted by drjolokia View Post
I've done a lot of research on this. I've talked with a BMW service Foreman and no one can seem to tell me why but installing a rear diffuser disables the kick trunk function.

This is true for the bmw m Performance diffuser and other 3rd party diffusers.

All I can find out is that it happens but not why it how to prevent it from happening.

That's why I decided to wrap the gray part of the rear bumper instead of installing a diffuser. It looks really good (not quite as good as a nice diffuser) and the kick trunk function works.
Only thing I can think of is maybe the way the cables were wrapped behind the oem diffuser was specific to its operation...I'm going to see about playing with it this weekend.
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      01-02-2019, 08:51 PM   #4
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Quote:
Originally Posted by Mach550 View Post
Quote:
Originally Posted by drjolokia View Post
I've done a lot of research on this. I've talked with a BMW service Foreman and no one can seem to tell me why but installing a rear diffuser disables the kick trunk function.

This is true for the bmw m Performance diffuser and other 3rd party diffusers.

All I can find out is that it happens but not why it how to prevent it from happening.

That's why I decided to wrap the gray part of the rear bumper instead of installing a diffuser. It looks really good (not quite as good as a nice diffuser) and the kick trunk function works.
Only thing I can think of is maybe the way the cables were wrapped behind the oem diffuser was specific to its operation...I'm going to see about playing with it this weekend.
Cool. Let us know how it goes.
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      01-08-2019, 10:37 PM   #5
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so I found that if I kick directly where the module is on the right side of the diffuser it seems to work.
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      01-08-2019, 11:36 PM   #6
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so I found that if I kick directly where the module is on the right side of the diffuser it seems to work.
Nice. Glad it's working.
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      01-09-2019, 08:48 PM   #7
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Quote:
Originally Posted by Mach550 View Post
so I found that if I kick directly where the module is on the right side of the diffuser it seems to work.
Strange. I find it that it works intermittently closer to the driver side. It's worked twice. Haven't been able to do it since. I have been using it on my old f10 550i and miss it in the new car. I have the M performance diffuser and i ordered the car with it, so it was installed at vpc by bmw. Hope someone has a fix for it soon.
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      01-13-2019, 07:19 AM   #8
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Quote:
Originally Posted by Mach550 View Post
It seems like ever since I unplugged the system to install a rear diffuser I have lost the kick function. I ensured that everything is plugged in correctly but I still can't get the kick to work. Are there issues with unplugging certain items while the car is unlocked? Physically there isn't much of a difference between where the system was in the OEM position and the new diffuser position. Also not sure if I should unplug the batteries for a couple minutes to clear out whatever bugs are lingering, this cars electronics make me worry about unplugging the battery.
Which diffuser do you have? Mine still works with this one.
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      Yesterday, 02:39 PM   #9
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I have the AC Schnitzer diffuser
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