Belt tensioner help.

[BillyB]

Having problems getting the right part/part number for the belt tensioner/pulley assy on the alternator belt on the 99 2.8. Can,t seem to get the right number off oem and there are so many that I keep getting told won,t fit. Its the one with the hex head you put a socket on in order to release the belt. I,m relying on the learned collective for help.

 

[colb]

Is it this one https://www.realoem.com/bmw/en/showparts?id=CH32-EUR-06-1999-Z3-BMW-Z3_28&diagId=11_6226
Ensure you search Realoem using the last seven letters and numbers of your Vin number so it will display parts fitted to your car.

 

[BillyB]

You can see how confusing it gets , yes I think its the one ending in 131 but that run down of parts are not clear. After getting the wrong one from my local bmw dealer they were a bit confused as to which one it should be and kept on about the hydraulic one. Then after asking the technician he told them which set up it was and they wanted to charge me about £200 for the whole lot !!!. So Ive been on to all the usual online suppliers but I,m not getting the part I want

 

[colb]

Using the part numbers off realoem on Autodoc brings these back for just the pully and the complete tensioner with pully

11281748131 https://www.autodoc.co.uk/spares-search?keyword=11281748131
and
11287838797 https://www.autodoc.co.uk/spares-search?keyword=11287838797

 

[BillyB]

Complete tensioner ordered, Thanks for the help, I was not putting the oem number in the top line so that didnt help.