I appear to have an interior water leak on my 2017 XF. Every time it rains the interior windows fog up. Without digging further I can not find any interior water leaks. What are the common points on this car that are known to leak water so I can focus my search there?

Thanks,
Chris

 

Update: The rain just stopped. I found water at the rear interior C pillar cover. So, fin antenna on the roof, sunroof drains or the CHMSL. Trunk is dry, carpet is dry. Where do the rear sunroof drains exit? Also, best way to drop the headliner down enough to access the antenna?

Thanks,
Chris

 

Tips from members at the XJ forum https://www.jaguarforums.com/forum/x...-lines-169307/

 

If I'm not mistaken, the "antenna" doesn't have a hole in the roof if it's like other roof fin "antennas", it's just glued on (I knocked one off once). Also, I believe the drain holes are in the front corners of the sunroof opening. There has been reports of the drain hole exit tubes being routed incorrectly but that usually causes puddles in the front foot wells. One area that is problematic is the rear door rubber seals with holes that don't line up with the holes in the door so water collects in the door. Open the door and pull the seal away at the bottom and I bet water will run out. Enlarge the hole in the seal.

 

The antenna wouldn't be able to connect to the cables with out a through hole.

I've dealt with that issue on my rear passenger door. That was odd to say the least. Opening a door and it sounds like a fish tank. I'm surprised that no water was able to get around the plastic membrane on the door and int the interior when that happened.

 

I did find this about a leak from the 3rd brake light: https://static.nhtsa.gov/odi/tsbs/20...42401-9999.pdf

Since I need to take the head liner down I'll replace that part. The antenna does appear to be a bit on the lose side, but the gasket appears to be built in and not a separate item.

 

It's not a physical connection antenna. It's more of a 'collector' that then transmits an increased signal through the roof to an amplifier. There's coils at the base. At least that's the way I've seen it on several of them and I don't see why Jaguar would do it any differently. Anyone know for sure with the Jag?.

 

There are a few cable connected to the antenna.

 

Or to a signal amplifier? Did you see a hole going through the roof? I'm curious. The 'shark fins' I've seen are flat on the bottom, no holes, I could see coils beneath clear, and they just glued to the roof.

 

It definitely has cables and a through hole in the roof. What vehicle did you have that had a wireless antenna? Every shark fine I've seen had wires going to the antenna. I don't see the 'wireless' ones working well on a metal roof. Maybe glass.

Here are a few images of the XF antenna:
https://www.prestigecarpartsuk.com/p...9-fw9319c089db
https://www.ebay.com/itm/365022667462

 

One was on a MB and the other a BMW. There were no components visible in either one like with the Jag pictures you included, just bare coiled wire under clear silicone. Yes, I would say the XF definitely would have holes in the roof, especially seeing those nuts and bolts! Mine were knocked off by a garage door closing prematurely and the other by some vandals. I assumed all were all like that. Learn something new every day. Find the source of water ingress?

 

Not yet. I ordered that part mentioned in the third brake light TSB. I'll wait until that comes in then drop the head liner. I'm betting it is the antenna as I can move it a bit by hand, but since I am in there I'll address the TSB as well.

 

Mine is loose as well. I'm guessing it's just the cover/fin that's moving.

 

I dropped the headliner down and forward enough to see the rear area. The grommet mentioned in the TSB is in fact leaking. However, the parts schematic only showed one, when there are two. One on each side. I only ordered one. I'll also have to order 3 of the plastic clips above where the front lights are as those broke when removing the headliner. The way they are installed looks like there is a specific thin tool to release them and the standard trim tools won't work.
The antenna appears to be tight to the body, but I still might see if I can just nip the nuts down a bit more.

I also found text from another TSB that mentions this grommet, but that also indicates TCU damage from the leak!

XE
XF
16-17MY
A customer may express a no start concern.
Upon investigation a technician may find that the Telematics Control Module
(TCU) is not reporting on the network. Further investigation into the TCU may
reveal water intrusion as the root cause of the failure. Through water testing
vehicles, the source of the water intrusion has been found to be from the
grommet behind the Center High Mount Stop Lamp (CHMSL). There is a new
part number for the grommet, T2R14098.On the flip side, if a vehicle has a
water leak from this area, but not a no start concern, the TCU should still be
checked for water intrusion to prevent future failures of the module.
SSM 73814
SSM 73854

Hopefully I caught it early enough that there isn't any damage. to the TCU.

There also do not appear to be any sunroof drains.

You can see the grommet in the mirror in the image below:



Water dripping down from the leak:


Discolored headliner from the leak:

 

FYI ..... I've been told that the fins that were knocked off my cars were not radio antennas They contained the GPS locating hardware, which is basically not much, like an air tag. Sounds like you are getting closer to resolution.

 

Between waiting for parts and all the rain I wasn't able to fully put it back together until this evening. That light is such a poor design for a few reasons.

The main gaskets for where the studs pass through the roof are single use foam gaskets with adhesive to hold them to the body and light body. When you remove the brake light they are destroyed. There are no replacements for them, at least no individual part numbers. They come with a new light. While the price of the light isn't that bad (around $120), it shouldn't be necessary to purchase a light just to replace the gaskets. There are also channels where they sit in the light so a simple flat gasket wouldn't work. Maybe a thick soft rubber may work there.

The grommets, the initial leak point aren't really firmly in the hole in the roof. They go in firmly enough, but obviously they don't make a good seal. Jaguar's TSB fix was a joke. It is the same grommet with a soft foam washer/o-ring added. I initially tried them with the foam gasket they came with. The side that was leaking didn't leak. However, the other side (which I also put the new grommet in) started leaking. I pulled the light out again and used non-hardening RTV sealant on the grommets. I also replaced the foam gaskets with a thick bead of RTV. I did that about a week ago before all the rain came. It didn't leak with all the rain and it didn't leak today when I tested it with a hose.

A few tips. The bulb stud that fits into the grommet is mean to slid in the light housing to adjust to variations. I greased those with some silicon grease so they would slide better and not push the grommet. One the rubber seal on the back side of the light I used a coating of soap so it would slide past the glass. I had noticed it watch catching on a test fit and made installing the light again a bit difficult.

A simple light behind the glass would have been much better instead of this stupid design.

A few images of the foam gaskets:



The old leaking grommet:


So many holes for a brake light.