What’s this noise coming from the rear end?

[Frasher4Runner]

My 4Runner is making a noise. I’ve heard this noise before but never could track it down so I just thought it was something outside. Finally, just now, I figured out the noise is coming from the rear end of my truck!

My truck has been parked in my garage for the last 5ish hours. I just happen to be near the rear when it started so I was able to tell that’s where it was coming from. What’s going on?! It almost sounds like some sort of compressor running.

2014 Toyota 4Runner Limited weird noise from rear end - YouTube

 

[Frasher4Runner]

The noise has now stopped. It happened for 5-10 minutes.


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[02SE]

Most likely your Key-Off EVAP system doing it's thing. I couldn't hear the sound on your video, but I'm in a noisy place at the moment.

Communication Is Key: Serial Bus Diagnosis | MOTOR

 

[Pedro367]

It's the evap system as he said. Perfectly normal.