[Matt88]

So i have found the full kit i need to do the alternator belt, tensioner pulley, idler pulley(x2?) and Water pump?.

However im not sure which is needed for my car?

Three options listed

http://www.gatesautocat.com/drive/BMW/123d-Coupe/E82/N47D20B-N47D20D/09-07_02-16/2530

K016DPK1817 - Has Belt, Tensioner pulley & 1 idler pulley -

http://www.gatesautocat.com/kit.aspx?k=K016DPK1817

K036DPK1698 - Has Belt, Tensioner pulley & 2 idler pulleys -

http://www.gatesautocat.com/kit.aspx?k=K036DPK1698

KP36DPK1698 - Has Belt, Tensioner pulley & 2 idler pulleys & Water Pump -

http://www.gatesautocat.com/kit.aspx?k=KP36DPK1698

 

[ste815l]

What year is your car?

 

[Matt88]

2008

 

[ste815l]

2 idler pulleys 1 pulley for steering and 1 pulley for climate.

http://www.realoem.com/bmw/enUS/showparts?id=UR52-EUR-05-2008-E82-BMW-123d&diagId=11_4153

 

[Matt88]

2 idler pulleys 1 pulley for steering and 1 pulley for climate belt.

http://www.realoem.com/bmw/enUS/partgrp?id=UR52-EUR-05-2008-E82-BMW-123d&mg=11&sg=18

Thanks The one with or without the water pump?

 

[ste815l]

Your car has all 3 of these options it just depends how many you want to change. So upto you change just 1 pulley or change 2 or change everything plus waterpump.