Rain water coming in under passenger seat.

[Eddie Brzoza]

Has any one any idea why water is coming through the air vent on my XJ X350 under the passenger seat . I have cleaned drain holes near cabin filter but still coming in into footwell of back passenger.

[N6 JMX]

Hi Eddie, sounds like you have a blocked drain from the AC system, a known problem especially in the New XK models. There is a modification to the drain that avoids future blockages. Not a big problem, but quite a task to access the drain and make the fix.

N6 JMX

[S collins]

Do you mean xj and not xk?

[N6 JMX]

The problem of the blocked AC drain persists on both the earlier New XK (X-150) and on the XJ (X-350).

N6 JMX

[S collins]

I'm aware of the problem duckbill involving iirc  06/07 and 09 xk however i have never came across the problem involving the 350 model 

[N6 JMX]

If you are sure it is rain water, then it should also come in when you hose / wash the car. Have you confirmed that it only comes in due to rain?

Try turning the AC off for a week and see if there is any improvement. Normally, in hot weather with the AC running, you will find a small puddle under the car when parked. Have you seen the puddle recently, or is the driveway dry under the car at all times?

Do you have a sunroof? There are also drains from the sunroof surround, but I have no idea where they travel through the car, but down an A-post would seem logical, ending up near the footwell.

N6 JMX

[Eddie Brzoza]

On 6/5/2024 at 5:48 PM, N6 JMX said:

Hi Eddie, sounds like you have a blocked drain from the AC system, a known problem especially in the New XK models. There is a modification to the drain that avoids future blockages. Not a big problem, but quite a task to access the drain and make the fix.

N6 JMX

Thanks for taking the time to reply. I must admit that I rarely use my jaguar and I assume that the car needs to be running for the AC system for water to build up and come out of the vents under the passenger seat. But I will check that when I run the engine for a while and let you know.

[Eddie Brzoza]

On 6/8/2024 at 3:52 PM, N6 JMX said:

If you are sure it is rain water, then it should also come in when you hose / wash the car. Have you confirmed that it only comes in due to rain?

Try turning the AC off for a week and see if there is any improvement. Normally, in hot weather with the AC running, you will find a small puddle under the car when parked. Have you seen the puddle recently, or is the driveway dry under the car at all times?

Do you have a sunroof? There are also drains from the sunroof surround, but I have no idea where they travel through the car, but down an A-post would seem logical, ending up near the footwell.

N6 JMX

Thanks for the reply. I am sure it is rain water it only leaks when it rains but don`t know why it comes through the air vents under the passenger seat. I have tried a hose pipe but it does not  leak. I don`t know why. I must admit that I hardly use me jaguar not been in it this year. I run it every month to make sure all is okay. There is no sunroof it`s not that. Will keep looking and let you know if I solve the problem.