My 2024 Forester sometimes hums while parked in garage. I looked it up in the manual and I guess this is something that the brakes sometimes do, even though the car hasn't been driven for hours. The manual implied this was an ok thing, but I would like to understand it a bit more as it seems like a very strange thing. Its an easily heard hum that sounds like a very small motor perhaps is running. It always comes from my rear passenger side wheel, and it seem to happen fairly often. Today, for example, I returned home from a trip to grocery about 1:00 and at 9:00 I noticed the car was humming away. Anybody have any insight or experience with this ?
Brakes hum when engine is not running
- Thread starter Stormy
- Start date
- Joined
- Jun 25, 2024
- Messages
- 119
- Reaction score
- 37
News to me but it can't be good for the battery to have that kind of drain with the engine off.
- Joined
- Jun 12, 2023
- Messages
- 7
- Reaction score
- 3
Noticed it last night for the first time, i was also concerned with the battery drain because of the cold temperatures, last night it was -20c. Picked up a booster today, merry Christmas to me…
Indeed I do!
- Joined
- Jun 12, 2023
- Messages
- 7
- Reaction score
- 3
Use it or loose it !! I have always used the parking brake and have never had any problems with it seizing
Bmart: you suggest the E-brake as the culprit. I assume you mean the parking brake? I just bought this car new in April, and it has hummed this little tune off and on, so I am guessing its not because something is wrong with the parking brake. I have used my parking brake maybe twice. Are you suggesting that we use our parking brakes more often to keep brakes healthy? Please explain to a novice. Thank you!
As per page 9 in your owners manual - this could be sound that you are hearing.
Noise from under the vehicle
S00AK01
NOTE
You may hear a noise from under the
vehicle approximately 5 to 10 hours
after the ignition switch is turned to the
“LOCK”/“OFF” position. However, this
does not indicate a malfunction. This
noise is caused by the operation of the
fuel evaporation leakage checking system and the operation is normal. The
noise will stop after approximately 15
minutes.
This is likely what I heard. Definitely coming from around the fuel tank. Key cycling the ignition stopped it in my case.
- Joined
- Jun 25, 2024
- Messages
- 119
- Reaction score
- 37
It's part of the smog stuff.
Based on my experience with older toyotas, the sound is coming from a small vacuum pump that pulls a mild vacuum on the fuel tank and associated pipes/hoses to make sure it is well sealed and not leaking air or fuel vapors. If it can't maintain the right level of vacuum for a certain time, the computer activates your check engine light.