Toyota highlander water leak passenger side

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Hi, have had wet carpets front and back for a while now. I finally removed carpet to the back seat row to expose bare floor. When sitting level and not driving, even in heavy rain, water does not enter. So I drove the vehicle in a pouring rain and whenever I braked, water was seen oozing from the side floor body wall BEHIND the driver's, and to a lesser extent, the passenger seat as well. I removed the floor side plastic trim at the entrance to the back seat row on both sides. When I injected water into the holes in the frame that the molding fit into, with the car FLAT, level and parked, it just drained out the bottom. BUT, when I put the car into a downward facing slant, with ramps under the back tires and do the same, I reproduce the leakage into the passenger compartment in exactly the same place as seen when driving.

Toyota highlander water leak passenger side

The source of the leak turned out to be missing rubber grommet hole plugs under the rear bumper. Water was flowing into the holes and collecting inside the frame of the car, eventually making its way into the cabin. The same principle can also be applied when troubleshooting water leaks on other models of Toyota or Lexus cars, as they often share similar parts and frame design. A water leak can cause corrosion or some serious damage to the electric system, and in my case to the hybrid battery located on the floor under the rear passenger seat. It can also cause mold and bad smell if the water stays on the carpet for too long. The problem was well hidden from plain sight. I tried many of their suggestions, like cleaning sunroof or AC condenser draining tubes, checking doors and roof racks insulation, door trim and windows weather moldings, etc. Months went by, and I kept dealing with wet carpets and kept checking online forums for the latest updates on this problem. At that point, I was willing to try anything in Florida it rains every single day in summer…. Removing the rear bumper cover was quite easy. There will be two screws under the rear door, three more in the wheel wells on each side, and two screws holding each mudflap. In addition, there will be 5 more screws and 5 push-pin fasteners on the bottom of the bumper cover. Those screws and fasteners come in all sorts of shapes and sizes, so you may want to keep them organized or take notes where everything goes. Also, you are likely going to break some of the push-pin fasteners as they become stuck from the road grime and snap very easily. You will need them to secure the bumper cover back in place.

The source of the leak turned out to be missing rubber grommet hole plugs under the rear bumper. Takes about 5 ft of hose per side.

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Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. I discovered lately that water drips continuously into the driver side floor from the cable hanger clip hole just below the fuse box. I check the drains, it was unclogged. I have checked all the solutions to similar problem but none address this type of issue specifically.

Toyota highlander water leak passenger side

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While this was not a fun job, especially pulling out the wire boxes, but it saved me a lot of money. Sort by Oldest first Oldest first Newest first Most reactions. The drain hole is partially blocked resulting in I found and ordered exact match new rubber plugs and covered the holes. I had the exact issue several years ago. Thanks in advance. Btw today I was in a Toyota shuttle to pickup my car, and the other person had the same problem, same model. Do you still have questions? Then used a wire to dig around the drain and vacuumed up again. I did it on my and am quite happy with it. Here's a video I found which led me to this discovery. I hope this helps someone else find their highlander water problem. A water leak can cause corrosion or some serious damage to the electric system, and in my case to the hybrid battery located on the floor under the rear passenger seat. Michael answered 3 years ago.

If your Toyota Highlander is leaking water, it could mean a few different things are happening. Some water is completely acceptable. It depends on the situation.

A water leak can cause corrosion or some serious damage to the electric system, and in my case to the hybrid battery located on the floor under the rear passenger seat. I ended up jamming a chopstick down the small hole a few times and finally got the funk through for water to flow. Guru9R5B75 answered about a year ago. After a couple days of rain the smell of mildew was unbearable. Still need to get an estimate to fix that. I does not peel off at highway speeds and I no longer have any rain problems. The source of the leak turned out to be missing rubber grommet hole plugs under the rear bumper. I can not find it under my carpet. New front bumper was recently installed, but can't figure how that would be the culprit Mlllie answered 3 years ago. GuruG7BZ5 answered 3 years ago. I finally removed carpet to the back seat row to expose bare floor.