"de Fragile Warrior Sports Supplies" wrote in message
...
Is it worth replacing? Does the door function correctly with replacement
hardware or is it easier/less aggravating in the long run to replace the
whole unit?

You might be able to get replacement parts, but each bifold door system is
different and you'd have to know your brand/model and probably get the parts
from the manufacturer.

You can order a new door it which will pretty much drop right into the door.
This will include the track, rollers, lower pivot, and additional parts.
You may or may not need to replace all those parts to get the door working.

-Tim