Ridiculous water under the driver seat 2016 z4

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Portisz4

Member
I was wondering before I rip the car apart . I have wet at the back of the cabin floor behind the driver seat.
I reached round to grab something and the floor is soaked.

Is there anything common I need to check before I rip the seats out .....

Actually I've just taken the seat out/up it's soaked.
No idea how to dry this
 
You need to remove the carpets to dry them. They have loads of foam underneath which soaks up water like a.....foam sponge!
Be careful as they will be very heavy and you can rip the carpet material (ask me how I know).

Then you need to find where the water is coming in!
 
I did indeed rip it !! Luckily it won't show. Yes there is a ton of water in there. Will have to try and get in there with a dryer tomorrow .
God knows where it's came from

Is a one piece carpet or a piece each side ?
 
There might get water from the climate drain onto the floor/carpet.

It's an open topic since years:
https://www-zroadster-com.translate.goog/forum/threads/wasser-im-fussraum.114316/page-4?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=de&_x_tr_pto=wapp#post-3410411

I'm not sure, if that might be similiar to your issue.
 
I thought I'd fixed the light cluster rubber. But water is streaming in the back light rubber boot.
So,
Is it possible for water to get from the back left light cluster area to the front driver footwell of the car ??
 
Portisz4 said:
I thought I'd fixed the light cluster rubber. But water is streaming in the back light rubber boot.
So,
Is it possible for water to get from the back left light cluster area to the front driver footwell of the car ??
Click to expand...

If the rear floor of the boot is flooded then there are two ducts for cables to run from the boot to the passenger compartment at boot level…each is about 1.5 by 3 inches..
 
Portisz4 said:
Is it possible for water to get from the back left light cluster area to the front driver footwell of the car ??
Click to expand...
Absolutely not from the rear lightclusters except you are using it as a Yellow Submarine. 8)

@B21 is correct, but that requires tons of water.

Are you sure, the backlight seals are mounted correctly (carefully pulled into the boot)?
 
I have to fiddle with the light boots. Perhaps a little sealant.

So, where can it come from then? There was a lot of water under the carpet. The sponge needed wringing out under the seat.
 
Having just bought a Z3 which had enough water in the carpets to sustain several goldfish, I would say check EVERY rubber seal.
The Z4 is different to a Z3 but the way they seal from the elements is very similar.

The most obvious is the windscreen to roof seal, as if water gets past that it can track down the A pillars and will dump it straight onto the carpets without much sign.

Look for watermarks/ staining around the plastic trims near the floor, then work back from there.

A small leak somewhere can let in a lot of water over time and it has nowhere to go except to soak into the carpet foam. It won't evaporate easily, either, as the carpet acts like a 'non return' barrier.

Good luck! :thumbsup:
 
If you pull off the kick plastic trim, towards it's front edge i noticed some water wetting foam under carpet by a stain.
I think water got under the door rubber seal then runs down to trim.
 
Portisz4 said:
Anyone else got a wet carpet in the e89 z4
Click to expand...

Got in the car today and noticed the seat belt was wet. Checked under the seat and it was soaking.
 
I think I know where mine is coming in. As the seat belt was wet I assumed it's coming in high. Looks like the rear window seal.

Need to keep an eye on it to see what needs to be done about it. Seemed a lot of water for a small leak, but I guess it could have been like that since I have had it and every time it rained there is ingress.
 
I had to take the seat out of mine . Took me a couple of hours to dry out the foam with dryers and such.

Now need the find how it's getting it. I've had the door card off but the membrane is all sealed very well so it isn't that
 
Have you got yours sorted yet portisz4?

Pretty certain mine is coming in though the rear window seal. Does this mean new rubber? If so is this a DIY job (for someone who is simple?)

I put a towel inside the window but today's rain has totally soaked it through. Need to get it sorted asap.
 
No. I haven't. I can't see anything coming in around the rear window though.
Any ideas... I totally dried it out. It's been sat on the drive for a week albeit in the rain . Ive done about 20 miles wet and dry.

I've just driven it now looked under the driver seat and the car driver side is absolutely flooded again . Something is very wrong. Anyone got any ideas.

Between the storms and a few miles driving the floor is flooded again
 

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I wish I could help but I have only had my Z about 3 months so I am a complete noob.

I assume you have no signs of entry across the window rubbers?

I don't know if I can replace the rubbers myself or not, I am not the most mechanically minded and don't have a garage or drive way to work on. Think I might have to find an independent who can do it for me.
 
RAYK47 said:
I don't know if I can replace the rubbers myself or not,
Click to expand...
Unless the rubber seals are perished (cracked or split) you don't need to replace them, just sort them out.
Get some silicone-based rubber and vinyl treatment (Gummi Pflege or similar) and give them a good going over. It may help to do them a few times if they are really dry.
The silicone does several things...it softens and expands the rubber as it soaks in. It also cleans any dried gunk on the surface and it is waterproof.

If the seals are perished then replacing them is simple, as long as you have right ones to replace them with. There are channels in the car's body that the seals push into. A thin film of silicone-based hybrid sealant/ adhesive will help install them and stop them from moving once cured.
 
Portisz4 said:
I've just driven it now looked under the driver seat and the car driver side is absolutely flooded again . Something is very wrong. Anyone got any ideas.
Click to expand...

Only you can see the car, so you need to find where it's coming in. Difficult in this weather at this time of year, granted, but a dry car, a hose pipe and a helper would be my advice.
 
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