Buy 2004 Audi A4 1.8L M/T FWD Base Sedan Differential. A4, S4; 4 Cylinder; Manual Trans; 5 Speed. A4 - OEM Audi Part # 01R500044A (01R-500-044-A)

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

Differential

Fits A4, S4

A4, S4; 4 Cylinder; Manual Trans; 5 Speed. A4, S4; 6 Cylinder; Manual Trans; 5 Speed. W/QUATTRO, 1.8 liter. W/QUATTRO, manual trans, 2.0 liter.
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 2004 Audi A4 to determine the best course of action.