Ridiculous water under the driver seat 2016 z4

Portisz4 · Post by **Portisz4** » Tue Dec 26, 2023 6:19 pm

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

Pondrew · Post by **Pondrew** » Tue Dec 26, 2023 8:32 pm

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!

Portisz4 · Post by **Portisz4** » Tue Dec 26, 2023 9:58 pm

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 ?

RobbiZ4 · Post by **RobbiZ4** » Tue Dec 26, 2023 10:35 pm

There might get water from the climate drain onto the floor/carpet.

It's an open topic since years:
https://www-zroadster-com.translate.goo ... st-3410411

I'm not sure, if that might be similiar to your issue.

flybobbie · Post by **flybobbie** » Wed Dec 27, 2023 1:34 pm

Also under carpet is an accelarometer with wiring. Don't want to ruin that.

Portisz4 · Post by **Portisz4** » Thu Dec 28, 2023 5:52 pm

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 ??

B21 · Post by **B21** » Thu Dec 28, 2023 6:00 pm

Portisz4 wrote: ↑Thu Dec 28, 2023 5:52 pm 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 ??

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..

RobbiZ4 · Post by **RobbiZ4** » Thu Dec 28, 2023 7:23 pm

Portisz4 wrote: ↑Thu Dec 28, 2023 5:52 pm Is it possible for water to get from the back left light cluster area to the front driver footwell of the car ??

Absolutely not from the rear lightclusters except you are using it as a Yellow Submarine.

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

Are you sure, the backlight seals are mounted correctly (carefully pulled into the boot)?

Portisz4 · Post by **Portisz4** » Thu Dec 28, 2023 7:26 pm

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.

Portisz4 · Post by **Portisz4** » Fri Dec 29, 2023 12:09 pm

Anyone else got a wet carpet in the e89 z4

Pondrew · Post by **Pondrew** » Fri Dec 29, 2023 12:35 pm

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!

flybobbie · Post by **flybobbie** » Fri Dec 29, 2023 1:36 pm

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.

RAYK47 · Post by **RAYK47** » Sat Dec 30, 2023 3:37 pm

Portisz4 wrote: ↑Fri Dec 29, 2023 12:09 pm Anyone else got a wet carpet in the e89 z4

Got in the car today and noticed the seat belt was wet. Checked under the seat and it was soaking.

RAYK47 · Post by **RAYK47** » Sat Dec 30, 2023 4:39 pm

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.

Portisz4 · Post by **Portisz4** » Sun Dec 31, 2023 2:45 pm

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

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