Liftmaster 041A5266-3 , 41A5034 Safety Sensor Brackets Only, 41A5266-1, 12D584-1
The LiftMaster 041A5266-3 safety sensor bracket kit is used to mount and align garage door opener safety reversing sensors at the door opening. These brackets are important because the photo eyes must remain aimed directly at one another for the opener to close normally and reverse if the beam is blocked.
This is a bracket-only kit, not a complete sensor kit. It is commonly connected in parts searches with 41A5034 safety sensor kits and related bracket numbers such as 41A5266-1 and 12D584-1. Customers often need this item when the original sensor brackets are bent, rusted, missing, or will not hold alignment after door track or opener service.
LiftMaster lists 041A5266-3 as discontinued, so the live product should be reviewed for availability and replacement direction. If the customer needs sensors as well as brackets, a complete safety sensor kit may be required instead of this bracket-only item.
Compatible With
Common Compatible Models and Applications
- LiftMaster DDO8900W commercial dock door operator applications where shown in the parts diagram
- LiftMaster 8557 belt drive garage door opener
- LiftMaster 8355 belt drive garage door opener
- LiftMaster 8160 chain drive garage door opener
- LiftMaster 8155 belt drive garage door opener
- LiftMaster 3240 screw drive garage door opener
- LiftMaster 8165 chain drive garage door opener
- LiftMaster 8075 chain drive garage door opener
- Various LiftMaster and Chamberlain residential openers manufactured after the late 1990s when the parts diagram calls for this bracket kit
Additional Model Families to Verify
- Openers using safety reversing sensor kits related to 41A5034
- Installations that reference 041A5266-3, 41A5266-1, or 12D584-1
Important Compatibility Notes
- Discontinued part number; review replacement options before upload
- Bracket kit only; does not include safety sensor eyes or wire
- Not all sensor mounting kits are interchangeable across opener generations
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Safety sensor bracket kit |
| Part Number | 041A5266-3 |
| Application | Mounting and aligning garage door opener safety reversing sensors |
| Compatible Operator Type | Select residential garage door openers and listed dock door applications |
| Related Sensor Reference | 41A5034 safety sensor kit |
| Included Components | Two mounting brackets when supplied as bracket-only kit |
| Status Note | Listed by LiftMaster as discontinued |
Also Known As / Related Part Numbers
- 041A5266-3
- 41A5266-3
- 41A5266-1
- 12D584-1
- 041A5034 - related safety sensor kit reference
- 41A5034 - related safety sensor kit reference
- 041A6569 - related safety sensor mounting kit to verify, not automatic replacement
Technician Note
If the opener closes only when the wall button is held down, the issue may be sensor alignment, sensor wiring, damaged photo eyes, or brackets that will not hold the beam steady. Do not bypass the safety system.
Before Ordering Checklist
- Confirm whether the customer needs brackets only or a complete sensor kit
- Check whether 041A5266-3 is still available or replaced
- Match the opener model and parts diagram
- Inspect sensor LEDs and wiring before replacing only brackets
- Verify that the new brackets allow the sensors to face each other squarely
Professional Advisory
Safety reversing sensors are required protective devices. If a garage door opener will not close because of sensor trouble, correct the sensor problem rather than defeating or bypassing the sensors.
Important Ordering Warnings
- LiftMaster references 041A5266-3 as discontinued
- This kit does not include the sensor transmitter or receiver
- 041A5034 is related to the sensor kit and should not be listed as the bracket-only kit unless confirmed
Product Questions and Answers
Is 041A5266-3 a complete safety sensor kit?
No. 041A5266-3 is a bracket kit. It does not include the sending sensor, receiving sensor, wire, or complete photo eye kit.
Why is 41A5034 mentioned with this item?
41A5034 is a related safety sensor kit reference that often appears with the bracket hardware, but it should be verified before treating it as the same item.
Is this part discontinued?
LiftMaster references 041A5266-3 as discontinued, so availability or replacement options should be reviewed before upload.
Can damaged sensor brackets stop the door from closing?
Yes. If the brackets bend or move, the photo eyes may lose alignment and the opener may reverse or refuse to close.
Can I bypass the safety sensors if the brackets are broken?
No. Safety sensors must remain installed and aligned. Replace or repair the sensor mounting issue instead of bypassing the system.
