Chrome Kidney Grille , Front Left - E39 M5 (2000-2003)

This part is listed by BMW as BMW part number 51132497261 (51-13-2-497-261) and is described as Grill - M Chrome - Left (driver's side) for E39 M5.  

This grill can also be used on all 1997-2003 non-M model 5 series to fresh the look of your stock hood grills to the nicer / newer M5 style, where the outer edge of the grill lays over the edge, giving more surface area of the chrome to shine. The hole in the hood that this fits into is the same for both M5 and non-M5 model 5 series, making them interchangeable. This is true for all 1997, 1998, 1999, 2000, 2001, 2002 and 2003 E39 5-series sedan and wagon models including 525i, 528i, 530i, 540i and E39 M5. 

This is the LEFT side, which is the driver's side on left hand drive (US) cars. If you are updating the look of your 5 series, or want matching brilliance of the chrome, be sure to buy the matching side.