LiftMaster 041A7920-1 is a residential garage door opener hardware replacement kit for select LiftMaster and Chamberlain opener rail assemblies. It is commonly used when installation or rail assembly hardware is missing, damaged, or lost during service. This is a hardware kit only, not a complete rail system, opener head, trolley, belt, chain, safety sensor kit, or arm kit. Public LiftMaster and Chamberlain references describe it as a replacement installation hardware kit for various residential garage door openers, with rail assembly use noted. Because hardware kits can vary between belt drive, chain drive, square rail, T-rail, and extension rail applications, the safest fitment method is to compare the original manual and parts diagram. Do not assume that 041A7920, 041A7920-1, and 041A7920-2 are the same package.
Product Details
This is a factory-style service part for a specific Chamberlain-built opener platform. For best results, match the part number on the replacement parts diagram and compare the original component before ordering. Small differences in suffix, connector layout, learn button color, drive type, rail design, or opener generation can change fitment even when the product names look similar.
Compatible With
- Various LiftMaster residential garage door openers where 041A7920-1 is listed
- Various Chamberlain residential garage door openers where the installation hardware kit is specified
- Select belt drive residential rail assemblies where public listings connect this part to rail assembly hardware
- Related Chamberlain-built Craftsman openers only when the parts diagram lists 041A7920-1 or 41A7920-1
- May be related to 041A7920 and 041A7920-2 hardware kit families, but suffix must be confirmed
- Not a universal hardware kit for every LiftMaster rail, and not a replacement for rails, belts, chains, trolleys, or motor heads
Also Known As / Related Part Numbers
- 041A7920-1
- 41A7920-1
- LM-041A7920-1
- Residential opener hardware kit
- Installation hardware kit
- Rail assembly hardware kit
- Related hardware references: 041A7920, 041A7920-2, 41A7920, 41A7920-2
Features & Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Part Number | 041A7920-1 |
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| Product Type | Residential opener hardware kit |
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| Application | Installation and rail assembly hardware service |
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| Compatible Operator Type | Select residential garage door openers |
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| Drive Type | Model dependent; check rail diagram |
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| Included Components | Installation/rail hardware based on kit configuration |
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| Notes | Does not include complete opener rail, trolley, belt, chain, or head unit |
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Common Replacement Reasons
- Installation hardware was misplaced
- Rail assembly fasteners were damaged
- Service manual calls for replacement hardware kit
- Customer is reassembling a compatible residential opener rail
- Hardware from a previous opener was mixed with the wrong rail
Technician Note
For LiftMaster and Chamberlain residential opener parts, the printed model number on the opener head and the replacement parts diagram are more reliable than appearance alone. Similar wire harnesses, wall controls, transformers, and travel modules may use different connector ends or programming requirements.
Before Ordering Checklist
- Confirm the opener model number from the motor head label
- Confirm the part number shown in the replacement parts diagram
- Match learn button color or security technology when the part depends on radio/control format
- Compare connector shape, wire routing, rail style, or included hardware to the original part
- Do not bypass safety sensors, cable tension monitors, or required safety devices during service
Professional Advisory
Disconnect power before opening a garage door opener motor head or replacing internal electrical parts. If the opener has burned wiring, repeated fuse failure, damaged logic board connectors, or unsafe door movement, have the unit inspected by a qualified garage door technician.
Important Ordering Warning
Do not order by brand name alone. LiftMaster, Chamberlain, Craftsman, and related private-label units can share families but still use different service parts by year, horsepower, rail type, drive type, board generation, and accessory technology.
Product Questions & Answers
What is 041A7920-1 used for?
It is a replacement installation hardware kit for select LiftMaster and Chamberlain residential garage door openers.
Is this the same as 041A7920?
Not automatically. The suffix matters, and the correct kit should be chosen from the opener or rail parts diagram.
Does it include the rail?
No. It is a hardware kit, not a complete rail assembly.
Can I use it on any residential opener?
No. Hardware varies by rail design, drive type, and opener generation.
What is the best way to confirm fit?
Use the opener model number and installation manual parts list to confirm 041A7920-1.
