A B C D E F G H I J 30 49 Ø8X9 Ø8 Ø10 Ø10 63 63 63 63 Suited for: Manufacturer Model Engine Engine code Series Model type Type description Year Technical info BMW Z4 23i 2.5 (2497ccm) Petrol N52B25A/N52B25BF E89 sDrive Roadster 2009 - 2011 AMP: 170 Volt: for vehicles with 12V main current Pulley Type: with freewheel belt pulley Pulley Dia.: 49,0mm Pulley Grooves: 6 BMW Z4 30i 3.0 (2996ccm) Petrol N52B30A/N52B30B/N52B30BF E89 sDrive Roadster 2009 - 2011 AMP: 170 Volt: for vehicles with 12V main current Pulley Type: with freewheel belt pulley Pulley Dia.: 49,0mm Pulley Grooves: 6