Originally Posted by phillipyang2

Hey guys!

So im in need of a new AC belt and tensioner for my 04 545i. I could not find a place online or local (Los Angeles Area) where they would sell them for cheap/ good price. I was wondering if anyone knew a supplier or a website i could order from.

thanks again guys

Originally Posted by Cypo545i

Hey this is very helpful to me as I am trying to replace my ac belt as well because it's worn out and I can't use my ac as whenever I turn it on the belt just screeches and smokes and I don't want it to snap cus that's an unnecessary hassle. Anyway I would like to add the tensioner option to my car as it makes my life so much easier because if I ever need to replace it again I'll easily be able to do it. The thing is though I looked up those part numbers and a few websites came up and they say this tensioner won't fit my car, the 04 545i. Should I disregard that and just order the tensioner anyway? Can you confirm that this will for sure fit?

Originally Posted by Cypo545i

Hey this is very helpful to me as I am trying to replace my ac belt as well because it's worn out and I can't use my ac as whenever I turn it on the belt just screeches and smokes and I don't want it to snap cus that's an unnecessary hassle. Anyway I would like to add the tensioner option to my car as it makes my life so much easier because if I ever need to replace it again I'll easily be able to do it. The thing is though I looked up those part numbers and a few websites came up and they say this tensioner won't fit my car, the 04 545i. Should I disregard that and just order the tensioner anyway? Can you confirm that this will for sure fit?

Originally Posted by jfife83

Yes they will fit....I used the AC belt and tensioner for the 745i and they do fit...the engine block is the same for both 545i and 745i. The block is precast with the mounting hole for the AC tensioner. If you look and feel you will find the mounting hole below and between the crank pulley and the AC. My AC works great.