Unknown part in my boot

Smudgemanuk

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British Zeds
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Dec 1, 2024
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Bicester, Oxford
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2.8l TU pre-facelift
Having only recently bought my z3 I am keen to learn more about it

I came across this part in my boot

Could someone please let me know what it is?
IMG_6444 (1)-2.png

Thanks Chris
 

Stevo7682

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Maybole , South Ayrshire
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If your electric roof fails your can turn the t piece to release the pump internal valve and allow the roof to be operated in manual mode.
Stephen.
 

ExMX5owner

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And that little T valve on the side of it is your manual override, in case of emergency...
 

ExMX5owner

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If your electric roof fails your can turn the t piece to release the pump internal valve and allow the roof to be operated in manual mode.
Stephen.
You type faster than me clearly ...LOL
 

ExMX5owner

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But that being said, I found out about that little T valve on the side of the pump, when of all things my brake switch failed. Now BMW in their herculean attempts to make everything idiot proof, put the roof switch behind you so its difficult to raise the roof doing 90 down the freeway, which of course would be disastrous for anyone behind you..So you have to have your foot on the brake as well, because obviously someone had tried it...BUT, its not completely idiot proof, because you can still attempt to put the roof up with the tonneau cover fitted. Not that I ever attempted it...:whistle:. So the little T valve turns the roof from Hydraulic power , to Weetbix assisted...;)
 

Smudgemanuk

Zorg Addict
British Zeds
Joined
Dec 1, 2024
Points
53
Location
Bicester, Oxford
Model of Z
2.8l TU pre-facelift
Thanks for your help everyone

Good to know if /when my electric roof packs in

Much appreciated Chris
 

Smudgemanuk

Zorg Addict
British Zeds
Joined
Dec 1, 2024
Points
53
Location
Bicester, Oxford
Model of Z
2.8l TU pre-facelift
But that being said, I found out about that little T valve on the side of the pump, when of all things my brake switch failed. Now BMW in their herculean attempts to make everything idiot proof, put the roof switch behind you so its difficult to raise the roof doing 90 down the freeway, which of course would be disastrous for anyone behind you..So you have to have your foot on the brake as well, because obviously someone had tried it...BUT, its not completely idiot proof, because you can still attempt to put the roof up with the tonneau cover fitted. Not that I ever attempted it...:whistle:. So the little T valve turns the roof from Hydraulic power , to Weetbix assisted...;)
I am a fan of the term "weetbix assisted"

I might need to add that to my vocab!

Thanks for your help
 

t-tony

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Torksey Lock,Lincoln, England
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E89 Z4 23i Auto
If you can t undo the valve you may need 3 wheatabix for your breakfast!

Tony.
 
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