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Water Leak under drivers seat

A

Aaron Spackman

New member
Can anyone help!!
I have a 99 Boxster which leaks during heavy rain. There is not sign of entry but the carpet gets very wet under the driver seat, more toward the back not directly under.

I have cleaned and checked the back drain holes (located under the roof panel) which appear to be clear but it is still coming in.

Any advice welcome.

Thanks
Aaron
 
Assuming the carpet is dry in front of the seat:

I would check the seal on the rear of the roof to make sure it is; attached and seals.

Keep an eye on the amount of wetness as the Alarm Control Box sits directly under the seat and water ingress into that is a real pain.
 
Hi Aaron,

I've read other posts on here - that say that if the drainage channels are clear then to check the door membranes - some kind of waterproof membrane within the doors that can break down eventually - I'm sure someone with a better knowledge than me can elaborate further!

Steve H.
 
If it makes you feel any better I've just had the same problem occur with mine; Boxster S 2005.

I think I agree; that it's the membrane in the RH door. I know these things happen,but I'd like to register my disappointment that

its occured. I've owned a lot of cars in my life (5 at the moment) and no other one has ever had such a problem. Excuse my ignorance

but should these not be lifetime items on a vehicle?! So, my 51 thousand quid Boxster is under a tarpaulin tonight whilst

my daughter's 8 grand Toyota of the same vintage carries on coping with the weather. I'll be on the phone on Monday to get it sorted.

My Boxster might be in the departure lounge.
 
Alarm box is under the passenger seat over here nick.

Dry the carpet with a hairdryer, once fully dry put blotting paper over the carpet and hold it all in place with bluetac, either wait until it rains or get someone with a hose to wet the car - simply watch the blotting paper get wet - this will indicate where the wet is comming from and then you will discover the reason for it.

A booring and tedious job but someones got to do it
 
ORIGINAL: Glyn

Alarm box is under the passenger seat over here nick.
Click to expand...

The was I going all LHD again ... next you will be telling me the steering wheel is on the other side!!! [;)]
 
Water under either seat can usually indicate a blocked drainage channel in the front luggage compartment just behind the battery. The drain hole becomes blocked and the water wells up , then finds its way through other openings into the passenger compartment and behind the carpet. Water collects at the lowest point under the seat where the rear control unit/ alarm electronics sit. If you have park distance control it sits under the seat on the other side.
 
Lots of good input here. For my part I can open the driver's door and trickle water down the outside and it reappears inside at the base of the carpet, so something is not right inside the door.

I'm off to get it fixed today at my OPD (who made me pay upfront for the door membrane before they would order it in!)

I'll report back later on what happened,

Cheers,

Buzz.
 
Well I'm back from the OPC and they replaced the door "membrane" and now my door has no leak.

So...........

Imagine how I felt when I got home after several miles in driving rain to find my door carpet nice and dry BUT.....

a good inch deep of water ONLY behind the driver's seat...... :-( Dry in front of the driver too.

No wet above up the sides or in front of this "well" behind the driver's seat at all; just a bit damp towards the rear right hand side

at the very back..... which is possibly just due to the water leeching up into the spongy area there.

So boys and girls any ideas? I'm at a loss now having, at stage one, made sure all the drains are clear both at the front and rear.

Incidentally this door "membrane" is made of solid metal and does not split...... it has a spongy seal around the outside and in

mine the sponge had perished and was leaking.(5 yrs old).

Squelch,

Buzz.
 
Problem now solved, or rather problems......

The door membrane is now done and waterproof and I found the rear RH hood drain part blocked. Hence in a heavy storm it could not cope with the volume. I put a net curtain supporting coil down the drain and then a blast with the hose and the flow rate out under the car increased greatly.

Now all I have to do is dry it all out!

Many thanks for all your inputs,

Cheers,

Buzz.
 
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