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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 07-16-2009, 05:24 AM
Flabbagasted Flabbagasted is offline
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Location: Carshalton Surrey
Join Date: Jun 2009
Posts: 6
Mein Auto: BMW E46 318i ES
Unhappy Bmw Issue

Hi All

Im wondering if you could help me , my bmw is running fine but when i put the air con on the car jults and then a continous noise is coming from the car its a sort of low tone vibrating noise. then when i switch the air con off all goes back to normal.

If i use the fan normally it works fine the air con works fine too just makes this noise.

Thanks for your help.
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Old 07-16-2009, 06:59 AM
AlboBMW's Avatar
AlboBMW AlboBMW is offline
Location: Norman, OK
Join Date: Feb 2009
Posts: 2,271
Mein Auto: '01 325i
Hopefully it only needs a can of R-134A. If the can doesn't help, the problem could be elsewhere, and somewhat expensive to repair.

It could be your HVAC blower and the DIY is here:

It's it is anything else more serious, you need to let a specialized mechanic to fix it.
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