41A3589-3 41A3589-12 Garage Door Openers Belt, 7ft Height Garage Door Belt Length 233" Can Replaces Chamberlain 41A3589-12 Belt Assembly, liftmaster Belt

And when I say it does not fit.... it does, it fits the drive plate, it is the correct length, but... the teeth / grooves are just a fraction wrong, hence it does not engage fully with the cogs and then, once the door is half up, it slips.

right size. worked well definitely watch a video before installing, if original belt is broken very important to get in opened position before installing . you must go and put the door in the closed position and while doing that wave your foot in front of the sensor so the door opens back up to the open position then you can put the belt on. if you just try to put the belt on without getting it in the home position, the door will not be synced properly. Definitely do some research. Other than that. It’s a simple easy job.

Perfect fit. Installed in 15 minutes. Whisper quiet again.

All hardware matched the old belt. Length was maybe 1/4" shorter than the 25 year old original belt. Ribs are correctly spaced. Build quality seems decent. No issues whatsoever with installation on an Anaheim (Chamberlain Group) 1600AD opener. Far too early to know about longevity, but hopefully this belt will last at least as long as the original.

works as original parts.