Fluid Leak Behind Drivers Side Rear Wheel

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Aug 11, 2020
NH and RI
I have been a long time lurker on the forum, having bought my 2011 LX570 about 5 years ago.

I have had no issues with it up until this past week when I noticed a damp patch on the ground under the rear drivers side mudflap. The following morning the patch had disappeared. The same thing happened the following day so got under the truck to have a look. The leak only happens when the vehicle is moving.

There is a square hole in the body behind the mudflap and I took this photo looking straight up. It looks like the pipes with the foam protection are leaking from the connection.

Can anyone tell me which system the pipes are part of?

Rear leak.jpg
It is your rear air conditioning drain. Supposed to do that. No need to worry
Just to be clear, the leak is coming from the connections with the 2 nuts at the bottom of the pic. The fluid seems to be some kind of oil, not water from the drain.
Looks like your orings on the rear AC lines need to be replaced. It’s refrigerant oil.
Anyone know the part# to replace the O-rings here? I can't find it in the service manual.

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