Kenworth Window Regulators R21-1005 R21-1005R *Please verify your OEM number(s) before purchasing. Replacement Window Regulator OEM Part Number Cross Reference: Driver: R21-1005 Passenger: R21-1005R Fits Kenworth Models: T600 (2004 - 2011) T660 T800 (2004 - 2011) W900 (2004 - 2011) No Wire Splicing ... See More