You will not find any brand vehicle that does not have a problem or two. Such a small problem and you are ready to turn on it.

 

Dreaming if you think any manufacturer can guarantee 100% there will never be a single defect with any vehicle.

 

Could be black mold forming (which is toxic). Having a similar issue with my 2017 RX. The dealer claims there was a spider infestation that blocked a drain plug causing water to backup into the cabin. They didn't even look at the car when I brought it in because they have had other cars come in with the same issue. Battling with the dealership because they won't cover it under warranty, they had me put a claim in through my comprehensive coverage. I'd like to know how many other owners have had "spider infestations".

 

i did in my 13 ES, but after a couple years. Dealer said it was spider infestation. I’m worried, because it seems like there are more and more reports of this happening in the 4RX, even vehicles that have only been on the road for a short time. Mb a design issue.

 

My friend had the same problem and the dealership (Serramonte Lexus) asked for $8,000 to repair it (which Lexus Corp also sided with). My friend took them to court and now they are asking him to sign a paper that they did not sell him a lemon. If these problems are occurring on more RX's, then Lexus should get it fixed. It is clearly a manufacture defect and they cannot 'hide' behind 'spiders.'

 

I had this problem on my 2016 F Sport when driving in heavy rain. Took it in and they thought it was a drain but it was not. They decided to replace the sunroof glass, which took 3 weeks for the part to come in, etc. It hasn't leaked since. Another dealership told me they have a bunch of RXs come in with this problem and they believe there's not enough sunroof depth to allow the water to drain out and pool up for the drain before the whole area is flooded and water penetrates inside. Not sure the whole story but I got a sunroof replacement out of it under warranty.

 

It would be great if someone can post before and after pics of the sunroof if they had it replaced. I am wondering if Lexus installed the re-designed part in RX450h which I received two weeks ago.

 

After reading all the posts, I'm starting to have doubts on Dealership claims cause is with "spider infestation". This is really doubtful especially those brand new cars less than 4 months old and not to mention most of these reported cars are garaged.

 

Yeah, the spider infestation reason sounds far fetched.

No problems here yet but I've not driven it much. Once it gets the attention for DOT, it will change things. I can't imagine a car accident due to distraction or temporary "blindless" from water dripping down the mic and onto the driver wouldn't go over very well.

 

Talk about far fetched!

 

 

I notice water also from my Lexus RX 300 whenever it rains the car will always be flooded with water especially the passenger side and over flow to the back sit .

 

I watched a video about the manufacturing process in Cambridge about the RX models. They are supposed to be water leak tested at the end of the assembly line with high pressure water. Why would the water leak not be corrected at the factory?

 

The problem with the leak is that it's not constant on all vehicles and there's a time delay in detecting it. The water leak test at the factory is too miniscule of a time exposure to rain to detect such leaks especially one that is caused by the AC evaporator coils. No amount of rain can detect this type of leak. On the otherhand, the roof leak from the sun roof, takes a while before the leak can be detected since it has to puddle first in the roofing before leaking. I wish Lexus is reading this forum and come up with a correct fix rather than blaming it on something that is not.

 

Hi, I have also wet caper issue.

I notified LX about wet carpet on 01/27/2018 for my 1 year complementary service call in.
They got diagnosis as AC drain line clog after 6-7 hours inspection and told me that it caused by spider web. They failed to provide any photo or evidence spider web can cause the water clog in the line.
Request proper photo from the incident date, but they always use other 350 model photo not directly from my vehicle.
The repair is not covered by Warranty since LX claimed the root cause as "spider web" (nature or God). But this is conflict to the root cause of 2013 Toyota Voluntary Recall (also caused by "spider web")
My entire carpet/liner/sound proof materials in vehicles are wet and I also see some Mold developed in the bottom of vehicle (inside of car) after they tear out all seats and carpets and materials.
Lexus quotes on this repair is over $9K and they recommend me to file my insurance. Estimated repair duration is given about 4-6 weeks.
Multiple times I complained. I asked them to provide me proper prevention user manual section or that proof of this is not caused by manufacturing defect or design flaw, but so forth, I don't get any of them.
Corporate office customer center is responding as similar as service center. Even they claimed that Toyota Warranty is different from Lexus since I ever mention the 2013 Toyota recall. (but service manual words and page print is identical to Lexus warranty page)
Since this is rare happening case such like Toyota Recall 2013, I am so unhappy why they treat the warranty coverage differently.
If this is owner's responsibility then, they should address a proper maintenance procedure for "spider web" on the owner's manual. (Example, tire is not cover by LX warranty, but they addressed on user manual)
I requested to the LX corporate office to show me the similar cases for 2017 RX model water damage by spider web, they resist to share the info as it is a company secrete.
I also request them to explain how they ensure the line is not clog from the manufacturing or even before manufacturing. No proper explanation yet. I don't know how Lexus is shining for Good Reliability and Quality Control.

I believe, with proper seal of AC evaporate box / unit + small filter install on the end of the drain line (exterior side), this problem can be simply prevented.
Since shop manager has been aware of this type of clogging issue and told me that they had been talking to LX factory multiple times, it's more like design defect/reliability issue to me.
I think that it is not fair to cover all the cost on me (my insurance). Why do I need to be responsible for this issue? Is it because it happens so rarely?
Please, be aware of my case and hopefully this can be help to other future victims.