Buy 2005 Audi S4 Differential. A4, S4; 8 Cylinder; Manual Trans. W/QUATTRO, manual trans, 4.2 liter - OEM Audi Part # 01R500046M (01R-500-046-M, 01R500044M)

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

Differential

Fits RS4, S4

A4, S4; 8 Cylinder; Manual Trans. W/QUATTRO, manual trans, 4.2 liter, code EXZ. W/QUATTRO, manual trans, 4.2 liter, code HWC.
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 2005 Audi S4 to determine the best course of action.