E90 trunk not staying open

zack9r · 08-17-2019, 05:14 AM

The trunk seems to have lost pressure in the (hydraulic or pneumatic) support struts. The trunk doesnt seem to want to come open without any help when opening, and slams shut when i let go. I dont know if this is with a lot of e90's but my dad's f30 328 seems to swing open when he presses the button to open the trunk

Could it need new support struts? Any fixes?

TheMidnightNarwhal · 08-17-2019, 06:08 AM

E9X don't swing open. Unless probably the wagon hatch I think.

zack9r · 08-17-2019, 06:12 AM

Quote:

Originally Posted by TheMidnightNarwhal

E9X don't swing open. Unless probably the wagon hatch I think.

Sedan

zack9r · 08-17-2019, 06:12 AM

Quote:

Originally Posted by TheMidnightNarwhal

E9X don't swing open. Unless probably the wagon hatch I think.

They swing up, didnt know what other word to use

Fredo · 08-17-2019, 11:15 AM

I say you need new trunk struts. My 2006 e90 had the same symptoms, new struts was the fix.

colorado.e9x · 08-17-2019, 11:43 AM

Quote:

Originally Posted by Fredo

I say you need new trunk struts. My 2006 e90 had the same symptoms, new struts was the fix.

+1 My 06 E90 did the same thing. Nearly chopped my fingers off once. You'll never realize how nice of an upgrade new trunk struts are until you have them

zack9r · 08-17-2019, 02:02 PM

Quote:

Originally Posted by colorado.e9x

Quote:

Originally Posted by Fredo

I say you need new trunk struts. My 2006 e90 had the same symptoms, new struts was the fix.

+1 My 06 E90 did the same thing. Nearly chopped my fingers off once. You'll never realize how nice of an upgrade new trunk struts are until you have them

Thank you

macheff03 · 08-17-2019, 06:14 PM

Get new struts
Many diys on YouTube and super cheap to buy the struts and the new struts will make it pop right open
I need to do mine too

dorupausan · 08-17-2019, 06:20 PM

hey bro, check this out

Fritzer · 08-17-2019, 08:03 PM

https://www.fcpeuro.com/products/bmw...r-stb-sg302066

10 minute replacement and your trunk will feel brand new.

Efthreeoh · 08-17-2019, 08:28 PM

The gas springs in the hood are probably close behind the ones for the trunk lid. Just replace all 4 of them.

Fritzer · 08-17-2019, 08:49 PM

Quote:

Originally Posted by Efthreeoh

The gas springs in the hood are probably close behind the ones for the trunk lid. Just replace all 4 of them.

Good point Ef! Considering how cheap they are to replace, and how easy it is to install, might as well knock them all out.

colorado.e9x · 08-17-2019, 11:17 PM

Quote:

Originally Posted by Efthreeoh

The gas springs in the hood are probably close behind the ones for the trunk lid. Just replace all 4 of them.

Yep, definitely. Happened to me as well

e90yyc · 08-18-2019, 01:30 PM

FWIW I replaced both my hood and trunk struts recently.

OE hood struts are Stabilus and the replacements work great.

For some reason, OE trunk struts are Suspa, and I couldn’t find them as a non BMW-branded part. Mucho expensive, so I went with Stabilus instead... They’re just okay. It’s still necessary to give the trunk a helping hand to open it, but it doesn’t take too much effort. My biggest complaint is that they aren’t damped well at the end of their travel, so instead of the lid slowing down as it approaches the end/bump stops, it hits them with enough force that it bounces a bit. Perhaps I didn’t look hard enough to find an OE (Suspa) non genuine-BMW replacement. If anyone knows where to find this, I’m interested.

From what I’ve read, others have had this same issue with these struts. But, they cost about 1/4 of what the OE ones do...

My solution has been to use one new strut and one old strut, because it bothers me more to see/hear my trunk bouncing at the end of its travel more than it bothers me having to give it a little lift.

That spring idea is actually pretty good. The F30 trunk is designed differently. I miss how easy it was to open!

gbalthrop · 08-18-2019, 01:45 PM

Quote:

Originally Posted by e90yyc

...Stabilus instead...they aren’t damped well at the end of their travel, so instead of the lid slowing down as it approaches the end/bump stops, it hits them with enough force that it bounces a bit. From what I’ve read, others have had this same issue with these struts. But, they cost about 1/4 of what the OE ones do...

Snapping the wiring harness at the hinge plane is NOT a good thing.

This is an E91 photo, but similar things can happen to the other E9x models with less wires to the lid:
https://www.e90post.com/forums/showp...97&postcount=5

George

colorado.e9x · 08-18-2019, 02:13 PM

Quote:

Originally Posted by e90yyc

FWIW I replaced both my hood and trunk struts recently.

OE hood struts are Stabilus and the replacements work great.

For some reason, OE trunk struts are Suspa, and I couldn't find them as a non BMW-branded part. Mucho expensive, so I went with Stabilus instead... They're just okay. It's still necessary to give the trunk a helping hand to open it, but it doesn't take too much effort. My biggest complaint is that they aren't damped well at the end of their travel, so instead of the lid slowing down as it approaches the end/bump stops, it hits them with enough force that it bounces a bit. Perhaps I didn't look hard enough to find an OE (Suspa) non genuine-BMW replacement. If anyone knows where to find this, I'm interested.

From what I've read, others have had this same issue with these struts. But, they cost about 1/4 of what the OE ones do...

My solution has been to use one new strut and one old strut, because it bothers me more to see/hear my trunk bouncing at the end of its travel more than it bothers me having to give it a little lift.

That spring idea is actually pretty good. The F30 trunk is designed differently. I miss how easy it was to open!

I have new Stabilus struts on all four corners of mine and they open and close as smooth as butter (with zero bounce). Odd?

e90yyc · 08-18-2019, 05:26 PM

Quote:

Originally Posted by colorado.e9x

I have new Stabilus struts on all four corners of mine and they open and close as smooth as butter (with zero bounce). Odd?

Hmm, yeah... That’s strange. I spent an inordinate amount of time x-ref’ing part numbers and all sorts of other shit when I was having that problem, but it seemed like I had the correct parts.

I know this might be a pointless ask, but any way you can take a short vid showing me the operation of your trunk? I’d like to see what mine SHOULD be like... Thanks!

e90yyc · 08-18-2019, 05:29 PM

Quote:

Originally Posted by gbalthrop

Snapping the wiring harness at the hinge plane is NOT a good thing.

This is an E91 photo, but similar things can happen to the other E9x models with less wires to the lid:
https://www.e90post.com/forums/showp...97&postcount=5

George

I agree, but perhaps I didn’t explain well. I’m not too worried about that happening, it’s just more a nuisance and “not very BMW-like.” It doesn’t blast open with massive force, it just bumps into the same rubber stops that exist for that reason, but with a bit more force than it should. If anyone is curious I can take a video. Maybe it’s a bigger deal than I think??

colorado.e9x · 08-18-2019, 05:31 PM

Quote:

Originally Posted by e90yyc

Quote:

Originally Posted by colorado.e9x

I have new Stabilus struts on all four corners of mine and they open and close as smooth as butter (with zero bounce). Odd?

Hmm, yeah... That's strange. I spent an inordinate amount of time x-ref'ing part numbers and all sorts of other shit when I was having that problem, but it seemed like I had the correct parts.

I know this might be a pointless ask, but any way you can take a short vid showing me the operation of your trunk? I'd like to see what mine SHOULD be like... Thanks!

I can send you one in about an hour. Do you have Instagram?

e90yyc · 08-18-2019, 08:51 PM

Quote:

Originally Posted by colorado.e9x

I can send you one in about an hour. Do you have Instagram?

I don’t haha. YouTube?

colorado.e9x · 08-18-2019, 09:22 PM

Quote:

Originally Posted by e90yyc

Quote:

Originally Posted by colorado.e9x

I can send you one in about an hour. Do you have Instagram?

I don’t haha. YouTube?

PMed

TheMidnightNarwhal · 08-18-2019, 09:25 PM

Quote:

Originally Posted by e90yyc

I agree, but perhaps I didn’t explain well. I’m not too worried about that happening, it’s just more a nuisance and “not very BMW-like.” It doesn’t blast open with massive force, it just bumps into the same rubber stops that exist for that reason, but with a bit more force than it should. If anyone is curious I can take a video. Maybe it’s a bigger deal than I think??

What do you mean? Do all your trunks swing open?

08-17-2019, 05:14 AM	#1
zack9r Private First Class 24 Rep 192 Posts Drives: bmw 335i Join Date: Jun 2019 Location: michigan iTrader: (1)	E90 trunk not staying open The trunk seems to have lost pressure in the (hydraulic or pneumatic) support struts. The trunk doesnt seem to want to come open without any help when opening, and slams shut when i let go. I dont know if this is with a lot of e90's but my dad's f30 328 seems to swing open when he presses the button to open the trunk Could it need new support struts? Any fixes? __________________ N54 e90 335i
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08-17-2019, 06:08 AM	#2
TheMidnightNarwhal Major General 2657 Rep 6,290 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	E9X don't swing open. Unless probably the wagon hatch I think.
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08-17-2019, 11:15 AM	#5
Fredo Lieutenant 191 Rep 538 Posts Drives: 2012 335i Join Date: Mar 2011 Location: Austin TX iTrader: (3)	I say you need new trunk struts. My 2006 e90 had the same symptoms, new struts was the fix.
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08-17-2019, 06:14 PM	#8
macheff03 Second Lieutenant 63 Rep 268 Posts Drives: 2006 BMW 325i Join Date: Mar 2019 Location: South Carolina Coast iTrader: (0)	Get new struts Many diys on YouTube and super cheap to buy the struts and the new struts will make it pop right open I need to do mine too __________________ ‘06 325i
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08-17-2019, 06:20 PM	#9
dorupausan Registered 2 Rep 2 Posts Drives: BMW E90 2011 Join Date: Aug 2019 Location: Bucharest/Romania / London/UK iTrader: (0)	check it out hey bro, check this out
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08-17-2019, 08:03 PM	#10
Fritzer No one sleep in Tokyo 945 Rep 1,507 Posts Drives: 2011 E90 328i//1995 E34 530i Join Date: Oct 2018 Location: San Diego, California -> Austin, Texas iTrader: (3)	https://www.fcpeuro.com/products/bmw...r-stb-sg302066 10 minute replacement and your trunk will feel brand new. __________________ 2011 E90 328i, 1995 E34 530i, 1992 E32 740i, 1991 E34 525i
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08-17-2019, 08:28 PM	#11
Efthreeoh General 17309 Rep 18,733 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	The gas springs in the hood are probably close behind the ones for the trunk lid. Just replace all 4 of them. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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08-18-2019, 01:30 PM	#14
e90yyc Art Collector 2425 Rep 3,448 Posts Drives: 2007 328xi (GM-delete 6MT) Join Date: Feb 2018 Location: Canada iTrader: (0)	FWIW I replaced both my hood and trunk struts recently. OE hood struts are Stabilus and the replacements work great. For some reason, OE trunk struts are Suspa, and I couldn’t find them as a non BMW-branded part. Mucho expensive, so I went with Stabilus instead... They’re just okay. It’s still necessary to give the trunk a helping hand to open it, but it doesn’t take too much effort. My biggest complaint is that they aren’t damped well at the end of their travel, so instead of the lid slowing down as it approaches the end/bump stops, it hits them with enough force that it bounces a bit. Perhaps I didn’t look hard enough to find an OE (Suspa) non genuine-BMW replacement. If anyone knows where to find this, I’m interested. From what I’ve read, others have had this same issue with these struts. But, they cost about 1/4 of what the OE ones do... My solution has been to use one new strut and one old strut, because it bothers me more to see/hear my trunk bouncing at the end of its travel more than it bothers me having to give it a little lift. That spring idea is actually pretty good. The F30 trunk is designed differently. I miss how easy it was to open! __________________ When I'm dead, just throw me in the trash.
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