Apologies for bringing this thread back from the dead, but this was extremely helpful. I was able to run the sensor cable for my MTX-L through that rubber grommet after poking a few holes very carefully with a screwdriver and then using some needle nose pliers to slip into the hole and open them to stretch and tear the rubber into the shape that I needed. I was hesitant to cut the rubber with a razor out of fear of hitting one of the wires on the interior side.

Also, taking off the UICP right in front of the grommet helps quite a bit.

 

Sorry for bringing this post back from the dead but would I have to seal the whole in made in the firewall? and if i went through the grommet in the wheel well that wire would come out near my left foot if i was sitting in the drivers seat correct? Thank you for the helpful post. I'm trying to run the wire for foglights

 

No, not if you make a small cut in the grommet. Sfter you stick your wire through it the rubber will compress very snugly around the wire u shouldnt have any issues.

 

Hi, sorry for bringing this thread from the dead again and again lol.
Would any of you know if there is a similar grommet behind the driver side fender on a 2015 outlander sport that I can feel couple wires from the engine bay to the cabin through there?

I tired to feed 2 10-gauge wires from the battery to the cabin (for an inverter), but finding an unused grommet in an outlander sport engine bay was hopeless.

 

by https://www.flickr.com/photos/140784895@N06/, on Flickr

 

looking clean!