Buy 2006 Audi S4 4.2L V8 M/T Base Sedan Differential. A4 Cabriolet; Manual Trans. A4, S4; 8 Cylinder - OEM Audi Part # 0AR500043D (0AR-500-043-D)

Center Differential.
Device connecting Drive Shaft to Axle Shafts that allows for varied speeds of wheel rotation.

Differential

Fits A4, S4

A4 Cabriolet; Manual Trans. A4, S4; 8 Cylinder; Auto Trans. Cabriolet S4; Manual Trans. W/QUATTRO, A4/S4, code HNP.
Differential - Repair or Replace
If you’re hearing gear whine, clunking, or bearing noise from your rear differential, it may be necessary to remove it and have it rebuilt. Have our technicians examine your 2006 Audi S4 to determine the best course of action.