This oil separator diaphragm membrane is compatible with various models, including A4/S4 B7/B8 (2004–2016), A5/S5 8T/8F (2007–2016), A6/S6 C6 4F (Avant, Allroad, Limousine) (2004–2011), A8/S8 D3 4E and D4 4H (2002–2017), Q5 8R (2008–2017), and Q7 4L (2005–2015).It is designed for use with 2.7L and 3.0L TDI engines.Alternative part numbers include 057103495, 057103495M, 057103495L, 057103495AA, 057103495AB, 057103495C, and 057103495Q.This component replaces OEM number 057103495N and supports proper crankcase ventilation system function.