Rear Differential Viscous Coupling Assembly KE012797X Fit For Mazda CX-3 CX-5 CX-9 AWD. OEM / Cross Reference Numbers:KE012797X,KEY02797X,KEY02797XA Connect the viscous coupling assembly to the differential housing. Ensure proper alignment with mounting bolts and torque to specified values. Attach driveshaft components as per manufacturer's service manual procedures. With its high-flow design, this differential axle breather boosts air venting efficiency, thus elevating the performance of your 4WD drivetrain to a superior level. This differential axle breather is equipped with a high-flow design that enhances air venting efficiency, resulting in exceptional performance of your 4WD drivetrain., Manufacturer: HAYSXVR