Is Bmw That Ridiculous? Help!?

So my oil filter housing was leaking. Ok. I bought oil filter housing for 2011 M3 E92 cause old one was cracked. Should be the same engine right?! So I put everything on 5 hours later after installing and torqueing everything. Cause vibration damper needs to come off and stuff. Well as I'm trying to put a deflection pulley that goes on a housing from my old housing IT WONT F*****ING FIT! WTF?
I guess they made different pulley for different years!? Anyways. If I order a pulley for 2011 Housing will it fit belt pattern? Or it might be off? Please help someone! Pictures attached bellow.

Two different kinds depending on build...

Different belts too.

This is why you order parts by vin nowadays. Changes can be made mid year of a build. That's BMW for you.

Pretty sure the belt pattern differed from 2008 to 09-11. My buddies 08 was different from my 2010.

Theodore wrote

For compatibility with the 2011 oil filter housing you will need:

1. Deflection (Idler) Pulley - BMW part #11287841531
2. A/C and Power Steering Accessories Belt - BMW part #11287841529
3. Different belt routing - the belt will now need to be routed under the power steering pump and over the deflection/idler pulley.

Check out the details about the differences with pictures in this thread here.

Thanks. I wonder what would of happen if I leave the same belt and same belt pattern?

monterey wrote

This is why you order parts by vin nowadays. Changes can be made mid year of a build. That's BMW for you.

That's not limited to BMW. Pretty much every car I have ever owned has had part revisions (Ford, Acura, Audi, etc). Remember, a ton of parts are not even built by BMW.

ThatWhiteM3 wrote

Thanks. I wonder what would of happen if I leave the same belt and same belt pattern?

Hey how's it going I just ran into the same problem as you what did you end up doing?