rattle tagged posts

BMW X3 fan noise fix

The BMW X3 fan blower separated from the white mounting plate

I’m happy to say the most annoying sound in the world is finally fixed. If you had the same problem as me, your interior HVAC fan would make a tiny, annoying squeal or squeak or cricket sound or noise or whatever you want to call it when on the lowest two or three speeds. It wouldn’t always squeak, but when it did it was annoying, especially since the car is usually so quiet and refined. All good news here, it was a quick fix and I did it for free. You’ll be happy once you too eliminate your BMW X3 fan noise.

Update:
Unfortunately – I still have the issue. It turns out the true fix for this issue is photo documented here. Some threads talk about servicing the CPU fan located behind the driver’s side footwell, but this is not the noisy fan...

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BMW X3 muffler rattle fix for no cost

BMW X3 E83 muffler

For about 6 months now I’ve been experiencing a BMW X3 muffler rattle. At first I ignored it but as it became more persistent and embarrassing, I decided to get under the car and troubleshoot it. All the connections under the car were firm and in good condition. What was causing the muffler rattle that sort of sounded like an aluminum can in my exhaust? I also noted, it only seemed to happen on start up, idle, and when the car was under no load decelerating.

I took a video and pasted it below with more details. Basically, there is a baffle in the right exhaust pipe that opens and closes based on a vacuum line. At idle and no load, the baffle closes and it opens once the engine starts winding up. It’s also closed when the car is off...

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