WARNING: This page is about a different car, the 2009 Audi A4, 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Reconditioning dimension in mm
Piston diameter
Cylinder bore diameter
Basic dimension
84.49 1)
84.51
1)
Measurement with coating (thickness = 0.02 mm). The coating wears off.