BMW Serpentine & A/C belts : Diagram /// 330i (E46)

[qwerbait5000]

So my serpentine and ac belt came off so did my fan blade break voiding much damage to radiator hood and fan shroud what do u guys think happened this is the second time

[bimmersgarage]

@qwerbait5000

What model year and what's the mileage? Without any videos of your ride (or seeing your vehicle in person), it's a bit difficult to diagnose. However, if this is the second time this has happened, then I would question you on the waterpump (it's bearings in particular) if the waterpump fails, it would allow the fan blade to wobble thus causing it to Shred things in the engine bay.

[pointklikkill]

this is a great diagram. is there anyway you can list the part numbers im getting a little confused between the 4 different pulleys. this is for my 2003 e46 330i

[mrfk86]

great info worked for my 325i thanks again

[harrykhehra]

hi i hace a 2001 bmw 330ci, i was wondering in your drawing are there two belts or 1?

[bimmersgarage]

@harrykhehra

There are two belts - the main Serpentine belt and a separate smaller A/C belt.

[55slice]

Great info. Just did this to my dayghters BMW. Although an E36 this was very helpful. Thanks for posting!

[bimmersgarage]

@55slice

You're most welcome! Glad it helped your daughter's Bimmer.

And, hopefully you did double check those pulleys when the belt was off. It's critical that you make sure those bearings in those pulleys are solid before new belts are installed. Just a heads up.

[rickzu]

thanks for the drawing man~

[bimmersgarage]

@rickzu

Certainly.

I know it's not Picasso...

but, I figured I put my mad drawing skills to some use.

Glad it helps.

[mlivvy]

this just helped me do mine. thanks man

[bimmersgarage]

@mlivvy

Great! Glad to hear this helped you. And, I hope you remembered to check the condition of your pulleys, while you were at it.

[dOlCeCaRaMeLo]

thanks man i appreciate that :)

[dOlCeCaRaMeLo]

hey man do you know if you have to calibrate the serpentine belt

once you install a new one?

i don't know that much about bmw's and i have an 2003 325i

[bimmersgarage]

@dOlCeCaRaMeLo

As far as any adjustment goes for the Serpentine belt, there are None. You just have to make sure you get the correct ribbed belt for your model year and after you release the Tensioner pulley... it will take care of the rest.