What is the life expectancy of a belt drive garage door opener?

A belt drive garage door opener typically lasts 10 to 15 years in residential use, with the motor being the limiting component. The belt itself is rated for 100,000 to 150,000 cycles, which is well over 25 years for a typical family. Quality units from LiftMaster and Chamberlain often run for 15 to 20 years with no major service needed. Belts can stretch in extreme heat or stiffen in extreme cold, but actual belt failure is rare. Lifespan shortens in unconditioned garages with wide temperature swings or heavy daily use. The most common failure modes are circuit board issues, the gear inside the motor wearing out, or remote and sensor electronics dying. Battery backup batteries inside newer models need replacement every 3 to 5 years.