BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
Technical Topics Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin Chirping/ Popping/ Electrical wiring like noise coming out of the AC system

Post Reply
Thread Tools Search this Thread
      11-03-2019, 03:01 AM   #1
New Member

Drives: BMW 3 G20
Join Date: Apr 2019
Location: California

iTrader: (0)

Chirping/ Popping/ Electrical wiring like noise coming out of the AC system

I have a G20, about 5 months old now, and I have this high pitched chirping, popping or some electrical wiring like noise that comes intermittently out of the air conditioning system. I was not sure initially where the noise came from when I took it to the dealer last time, and they said they couldn't find the noise from the dash, but I experimented and by turning off the fan to complete off, I noticed that the drive is noise-free.

It also seems like it has to do with the modes that the Air Quality and the other options in the climate control system. For eg: it is more frequent when:
- The Air fans are at higher speeds
- When Air Quality mode is on Auto. (it is least frequent in re circulation mode)
- When the A/C was actually un-checked in the driving system

About when it occurs, I am almost certain that it occurs mostly when there is an acceleration or breaking (sudden movement perhaps) and when it goes over bumps (I have 19-inch wheels), but sometimes it just happens on its own. Most times this noise comes from the center vents, but sometimes from the passenger and the driver side too.

I would want them to inspect the whole AC system end to end to find the bottleneck, I am not sure if something got into the system or there is some wiring issue because it feels like a high pitched crackle when it happens. Is this a common issue in BMW's that can be fixed?

This is my first car, so I don't have experience. Has anyone faced this kind of issue and how to tell the dealer so that I don't get turned down in a manner that they weren't able to locate the noise? Please help.

Also, another issue that I have been noticing is after parking the car, there is some rattling sound that comes from underneath the car when I turn off, and it stays for a few minutes- Is it an issue?

Last edited by bimmer21k; 11-03-2019 at 03:16 AM.. Reason: Better explaination
Appreciate 0
Post Reply


air conditioner, air conditioning problem, climate control, noise, rattle, service + maintenance, service advisor

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 02:27 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.,,,,,,,,, logo and trademark are properties of BIMMERPOST