Completely functional -- wire guide broken as shown in photos, item is for someone handy who can repair.

Replacement motor assembly for Genie chain drive and belt drive model garage door openers listed below. 

• Motor Assembly includes: (1) Motor, Optical Encoder with the cover (RPM Sensor), the wiring harness, 3 Self Tapping screws
• Genuine Genie replacement part 
• Compatible with models: 1035, 2036, 1028, 2028