2012 M37x Water leaking and collecting in cabin

Forum for Infiniti M37, M56 M35h Hybrid and Q70 owners.
bevins2012
Posts: 3
Joined: Mon Jul 12, 2021 3:50 pm
Car: 2012 Infiniti M37x

2012 M37x Water leaking and collecting in cabin

Postby bevins2012 » Sat Jul 17, 2021 8:16 am

I am having an issue where it rains and a lot of water ends up collecting in the rear passenger floorboard. I tried taking it to a mechanic a while back and he couldn't identify the leak. He said he checked all the outside seals with soapy water and may have also checked the sunroof drain. After searching around in general I have found some people with water leaks but none of them in the same spot as mine. I also noticed than when I parked that some water is slowly dripping underneath the car to the ground directly below where the leak is though I don't imagine the source of the leak is underneath the car as the water leaks in from the rain when it is parked.


Yoda's Master
Posts: 331
Joined: Tue Jul 10, 2018 11:26 pm
Car: 2012 M56
2009 370z
Location: Rock in the middle of nowhere

Re: 2012 M37x Water leaking and collecting in cabin

Postby Yoda's Master » Sat Jul 17, 2021 10:43 am

Check the connection of the main harness coming in from the engine bay through the firewall. Someone on FB had a leak and it turned out to be coming from the main harness opening.

bevins2012
Posts: 3
Joined: Mon Jul 12, 2021 3:50 pm
Car: 2012 Infiniti M37x

Re: 2012 M37x Water leaking and collecting in cabin

Postby bevins2012 » Sat Jul 17, 2021 10:54 am

Is there any instructions to access that? I can't find any

Yoda's Master
Posts: 331
Joined: Tue Jul 10, 2018 11:26 pm
Car: 2012 M56
2009 370z
Location: Rock in the middle of nowhere

Re: 2012 M37x Water leaking and collecting in cabin

Postby Yoda's Master » Sat Jul 17, 2021 12:57 pm

take off the trim around the battery.

bevins2012
Posts: 3
Joined: Mon Jul 12, 2021 3:50 pm
Car: 2012 Infiniti M37x

Re: 2012 M37x Water leaking and collecting in cabin

Postby bevins2012 » Thu Sep 02, 2021 9:31 pm

Just wanted to report for the next person who stumbles on this thread. I solved the leak. Turns out the AC output house was completely disconnected. It was undamaged in any way but instead of the water draining through the hose it was pouring straight to the floor.


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