986 seat bottom repair “band”
 

So today i went out in the 04 Boxster and heard (and felt) a pop under the seat. I then felt and heard a second pop. I noticed when I got ihad t to f the car that the seat bottom cushion did not return to text normal position. It was sagging.
I took the seat out and it doesn’t look like the diagrams I have seen online. It has a kind of “band” from front to back with a rubber piece that I assume carries the weight of the cushion. That has snapped. Has anyone wv r had to repair this?

1997-2000 have a much more durable metal spring setup. 2001-04 have a plastic mesh spring. The 01-04 mesh or the plastic frame will eventually break. It's easy to retrofit the earlier frame and springs into your 04 seat cushion

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THanks Woody. I actually found a write up on another site with the part number from the band ( it is 99652150702, btw) which is called an "Absorber Mat". I already ordered one on ebay so I will try the swap out and, if that doesn't work, my fallback will be to replace the bottom completely.

A couple years ago I repaired one and started making a DIY ...and never posted. Here's the pics I still have:
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I actually tried that...it lasted about 10 minutes. The rubber part of thof band as just too dried out.
The good news is I found a replacement band on eBay for about $45. The bad news is when I got it I realize the ends of it or frayed even more than my original band from 2004. I then found out you have to pretty much disassemble the entire bottom of the seat to get the band swapped out. I did eventually get it swapped out but after sitting in it the first time as a test and looking under again I see that the foam is still pushing out of the plastic frame. The band is in place but whatever kept the foam inside the frame has weakened to the point where all of my weight is riding on that band.

It looks like I might have to find an older frame.

My pictures may be hard to completely follow along without a description. I did not attempt to repair the band; I completely replaced it.

1. remove the old band completely.
2. Cut a heavy material to replace the band. I used a scrap of trunk liner (grab one for a couple $ at a junk yard if you don't have a suitable material) cut to about 11 x 13 inches.
3. Insert heavy duty zip-ties in all of the attachment points (around the metal rod).
4. Line up the material with the seat frame, mark then drill holes for the zip ties to secure it.
5. Put the material in place, insert zip-ties and tighten.

***note: I did add two additional holes for zip ties on the left and right side of the plastic frame.
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Mine has held up well for 2 years and is a little more firm than the original.

I could send you a seat base from a '99 if Woody doesn't have one available. Good, but looks like partial cracking in the leather along the stitching in one part.

Here's pics of the one I will sell: https://www.flickr.com/photos/126478035@N08/shares/768jf7

Thanks for the great tips. The driver seat in my 2003 boxster has the same issue. Where did you source the heavy material? Any hints would be helpful.

Thanks for the great tips. The driver seat in my 2003 boxster has the same issue. Where did you source the heavy material? Any hints would be helpful.

Do you still have it for sale?

Did my driver seat today
 

Now that track season is over until next spring, it's time for me to remove my track seats and put my standard seats back in. The band on the bottom of my driver's seat hasn't broke, but the cushion is definitely a little saggy. I didn't have access to any trunk liner material, but my wife is a real estate agent and she recently got new signs, leaving me the old signs for various projects. They are some kind of heavy duty PVC plastic sheet, about 3/16" thick. So I cut a piece about 12"x8.5" and attached it with zip ties. The hardest part was threading the zip ties around the steel rod. I used a flat blade screwdriver to easily pierce the webbing on both sides of the band material, inserted the zip tie and then stuck a needle nose plier into the foam and under the steel bar to grab the end of the zip tie and pull it through. Once I was satisfied that the zip ties were tight enough, by sitting on the seat on the garage floor, I cut off the excess ends of them. Some time this week I will install the seats in the car and take a test drive. If I'm not happy with the results then I'll do something else when the seats come out next spring and the race seats go back in.

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I DIY’d the bottom webbing of the driver’s seat in my ‘03. Used anything I could find laying around, but basically a sheet of plexiglass with thin foam held in place by para-cord. Looked a mess, but actually worked pretty well. However, I later decided to get the seats professionally reupholstered with new foam and skins. The installer had a nice solution for the sagging bottom - heavy duty canvas, stretched pretty tightly. Been good for about 2 years.
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Torn seat bottom mesh zip tie fix
 

I ran into the same issue as others have, that sinking feeling and the feel of ripped material under the bottom of the seat. I decided that since the time is also coming where I’ll need new leather covers, but not now, to perform a support and zip tie operation. I cut an plastic lawn sign it to fit under the seat foam and secured it as others have with zip ties. I added a few side support points. Feeling certain that both my 200 lbs weight and my driving style would cause those zip ties to pull through the plastic sign, I decided to weave zip ties across the bottom of the plastic support piece in a zip tie webbing fashion. It should hold up for a while. Also, no need to disconnect the battery to avoid an air bag warning light. Just take the key out of the ignition before you disconnect the wiring harness under the seat. That can be easily accomplished by using a 6” piece of 2x4 lumber to prop up the seat (after unbolting) twisting the connector counter-clockwise 45 degrees to detach from the frame and on the passenger side of the connector, pulling a clip on the connector in the direction of the passenger side of the car thus freeing the plug which then easily pulls out.http://986forum.com/forums/uploads02...1669530620.jpg

My 03 manual seat is stuck in the raised position with the hydraulic cylinder extended as as in the photos.
I’ve tried everything except taking it out. Afraid I’ll wreck the bottom like this if I thrash any harder.
Any idea how to lower?