Buzzing noise 98 E36 M3/4

[lost1]

When I start my car in the morning there is this buzzing noise, it goes away in a like a minute. I think it's because the car need to warm up...? Does anyone know what the problem might be? Thanks.

[thekid]

Buzzing like vibration? like electric motor? from the dash? from the door? from your cell phone? Little more info and we can make at least make an educated guess.

[bimmerguy82]

Originally Posted by lost1

When I start my car in the morning there is this buzzing noise, it goes away in a like a minute. I think it's because the car need to warm up...? Does anyone know what the problem might be? Thanks.

hydrolic lifters?

[lost1]

sorry, its like a humming buzz coming from the engine when i start my car in the morning to go work and same thing coming back from work. goes away in like a minute or so after the car warms up a little. thanks.

[rbm323]

Mines does the same thing! Also idles higher in drive versus low gear(auto) about 150 to 200 rpm difference.

[CJH]

Secondary air pump. located on passenger side behind shock tower. Common failure on all OBDII cars:

How-To: Replace Your Secondary Air Pump (1996-up E36 6-cylinder cars) - Bimmerforums - The Ultimate BMW Forum

[lost1]

Thank you.