[maverickfp18]

See video please. It generally happens after some spirited driving on my way home from work. I hear it once I pull in garage. As you can hear in the video, it goes away after a restart. Thoughts?

Also. I bought the car about 6 months ago and it's about to cross 50k miles. 2013 e93 335i. Is there a maintenance schedule posted somewhere so I can do at least some of the checks myself? Thanks in advance if there is.

https://youtu.be/gLcS4fLI0c0 You can skip to about 55 sec. to hear the after restart.

[BurrNinja]

Originally Posted by maverickfp18

See video please. It generally happens after some spirited driving on my way home from work. I hear it once I pull in garage. As you can hear in the video, it goes away after a restart. Thoughts?

Also. I bought the car about 6 months ago and it's about to cross 50k miles. 2013 e93 335i. Is there a maintenance schedule posted somewhere so I can do at least some of the checks myself? Thanks in advance if there is.

https://youtu.be/gLcS4fLI0c0 You can skip to about 55 sec. to hear the after restart.

That hum sounds like failing boost solenoid.

[maverickfp18]

Originally Posted by BurrNinja

That hum sounds like failing boost solenoid.

Ok. Thanks. Do you have any info on where to find out how to fix the problem? Thanks.

[Tunafish]

Sound of a failing pcv valve maybe? Does sound go away when you open the oil filler cap while noise is present?

[solidsleeper]

it's the boost solenoid, also known as pressure convertor / wastegate actuator valve.

I had the same noise as your video and it would sometimes go away when restarting the car like it did in your video. noise started on my 2013 n55 x1 @ around 50k miles earlier this year, replaced and haven't heard the humming for since replacing 7 months ago.

check realoem.com to find the latest part # revision.

[maverickfp18]

Originally Posted by solidsleeper

it's the boost solenoid, also known as pressure convertor / wastegate actuator valve.

I had the same noise as your video and it would sometimes go away when restarting the car like it did in your video. noise started on my 2013 n55 x1 @ around 50k miles earlier this year, replaced and haven't heard the humming for since replacing 7 months ago.

check realoem.com to find the latest part # revision.

Perfect. THanks so much for confirming the diagnosis. Buying the solenoid as we speak.