Aftermarket 041A5250-1 belt assembly for a 8 ft tall garage door. Same length, same groove profile, same fitment as the factory belt — at roughly a third of the price. Fits Chamberlain WD822K, WD822KD, WD822KS, WD912KS, WD922K, LW2000, LW3500, HD520EV and LW3500EV, plus the equivalent Chamberlain and Sears Craftsman openers of that generation.
Aftermarket or genuine — which should you buy?
An honest answer, because both have their place.
| This aftermarket belt | Genuine LiftMaster 041A5250-1 | |
|---|---|---|
| Fitment | Identical — same length, same grooves, same mounting | Identical |
| Price | Roughly a third of the OEM price | Full factory price |
| Made by | Third party to the same specification | LiftMaster / Chamberlain |
| Choose it when | The opener is out of warranty and you want the door working again without paying factory prices. This is what most installers fit. | A warranty, an insurance requirement or a written specification calls for genuine OEM parts |
Want the factory part instead? Genuine LiftMaster 041A5250-1.
Specifications
| Replaces part number | 041A5250-1 (also written 41A5250-1) |
|---|---|
| Door height | 8 ft |
| Belt family | 41A5250 |
| Fits | Chamberlain WD822K, WD822KD, WD822KS, WD912KS, WD922K, LW2000, LW3500, HD520EV and LW3500EV |
| Type | Aftermarket equivalent, not OEM |
Is this the right belt?
Two things must match: the belt family and the door height. Check the number printed on your old belt — if it reads 041A5250-1 or 41A5250-1, this is the one. Otherwise go by your opener model, which should be one of: WD822K, WD912KS, WD922K, LW2000, LW3500.
Measure the door opening, not the old belt — if someone previously fitted the wrong length, measuring it repeats the mistake.
Other lengths, aftermarket
| Door height | Aftermarket | Genuine |
|---|---|---|
| 7 ft | 041A5250 aftermarket | 041A5250 |
| 8 ft — this belt | 041A5250-1 aftermarket | 041A5250-1 |
| 10 ft | 041A5250-2 aftermarket | 041A5250-2 |
Wrong family? The 41A3589 fits 1270, 1280, 1280R. The 41A5434 fits 2500, 2580, 2280, 3280, 3500, 3850, 8550. These are not interchangeable. See the belt and rail selector if you are unsure.
Is the belt actually the problem?
| Symptom | Likely cause |
|---|---|
| Belt frayed, split or snapped | This belt |
| Belt intact but slack, will not hold tension | 41B4103 tensioner — far cheaper, and a common misdiagnosis |
| Belt pulled out of its anchor at the trolley | 041B5669 belt clip & link |
| Door releases on the cord but will not re-engage | 41B3869-1 trolley assembly |
Common questions
Will an aftermarket belt void my warranty? If the opener is still under a manufacturer warranty that specifies OEM parts, fit the genuine belt. On an out-of-warranty opener — which is most of them by the time a belt fails — there is nothing to void.
Does it last as long? Belt life depends far more on tension and rail condition than on brand. A correctly tensioned belt on a greased rail lasts years; a slack belt on a dry rail does not, whoever made it.
Is it exactly the same size? Yes — same length and groove profile as the 041A5250-1. It fits the same pulley and the same trolley.
Is it the same as a Chamberlain or Craftsman belt? Yes. Those openers share the drivetrain with LiftMaster, so this belt fits all three.
Does it come with a trolley? No, this is the belt only.
Related
LiftMaster belt drive belts & rail parts · belt tensioner · rail grease · all garage door opener parts
Not sure which belt you need? Send us a photo of the old belt and your opener’s model number — parts@gatehousesupplies.com or 866-965-5599. Since 1993.
