LiftMaster 2500, 2500B, 2500D, 3500 DC Belt Parts
LiftMaster 2500, 2500B, 2500D and 3500 Replacement Parts
These are the DC belt drive openers. Unlike the AC models, most of their electrical parts are specific to the variant — the motor, logic board, power supply, transformer and wire harnesses all differ between a 2500, a 2500B, a 2500D and a 3500. Check the Fits column before you order. Your model number is on the label under the light lens.
Ordering a belt? The belt is sized to your door height, not your rail, and all four models use the same 20 rib 41A5434 belt. See the belt table below, or use the full LiftMaster belt selector if you are not sure which you need.
1. Motor Unit
First part of number below corresponds to diagram number above:
| Ref | Part # | Description | Fits |
|---|---|---|---|
| 01 | 041C0076 | Belt cap retainer and cog | All |
| 02 | 041B4245-1 | Line cord, 6 ft | All |
| 03 | 41B4375-2 | Terminal block with screws | All |
| 04 | 41C53 | Belt cog | 2500 |
| 05 | 041C5317 | Wire harness | All |
| 05 | 041C5317-1 | Wire harness, logic | 2500D, 3500 |
| 05 | 041C5418 | Light socket wire harness | All |
| 05 | 041B5405 | DC motor wire harness | 2500, 3500 |
| 05 | 041C5511 | High voltage wire harness | 2500 |
| 05 | 041C5839 | High voltage wire harness | 2500B, 2500D, 3500 |
| 06 | 041D0605-5 | Motor, 80kg / 100kg | 2500B |
| 06 | 041D0605-1 | Motor, 80kg / 100kg | 2500D, 3500 |
| 07 | 041DB001-1C | Receiver logic board assembly | 3500 |
| 07 | 41D183 | End panel | 2500 |
| 07 | 41D182-1 | End panel | 2500B, 2500D, 3500 |
| 08 | 041B5351-6 | Power supply | 2500B |
| 08 | 041B5351-7 | Power supply | 2500D, 3500 |
| 09 | 041C0153 | Transformer | 2500 |
| 09 | 041C0168 | Transformer | 2500B, 2500D, 3500 |
| 10 | 41D630-2 | Bracket — light socket and limit switch | All |
| 12 | K175C0147 | Light socket | All |
| 13 | K108D0078 | Light lens | All |
| — | 041A4371 | Belt cap retainer — not shown on the diagram | All |
If you have the original 2500, read this first. Its logic board is no longer manufactured and we do not stock a replacement, and its power supply (041B5351-4) is also discontinued. The 2500's transformer, end panel, high voltage harness and all mechanical parts are still available. If your 2500 has a dead board, call (866) 965-5599 before ordering anything else — a full opener replacement is usually the better spend. The 041A5507-6C board for the 2500B and 2500D is also discontinued, and ref 11, the 41A5490-10 cover, is no longer available.
2. Belts
All four models take the 20 rib 41A5434 belt. Measure your door opening height, not the rail. We stock the genuine LiftMaster belt and a lower cost aftermarket belt built to the same length, rib pitch and end fittings — the aftermarket belt typically runs about a third of the factory price and installs identically.
| Door Height | Belt | Factory (OEM) | Aftermarket |
|---|---|---|---|
| 7 ft | 41A5434-11 | Factory belt | Aftermarket belt |
| 8 ft | 41A5434-13 | Factory belt | Aftermarket belt |
| 10 ft | 41A5434-14 | Factory belt | Aftermarket belt |
A belt rarely fails on its own. Check the belt pulley bracket, trolley and tensioner while the rail is apart — see all belt drive rail parts.
3. Battery Backup and Bulbs
| Ref | Part # | Description | Fits |
|---|---|---|---|
| — | G485LM | 12V replacement battery for the backup system | 2500D, 3500 |
| — | LMLED1 | Universal replacement LED bulb, vibration rated | All |
A battery backup that no longer holds charge is usually just the battery — the G485LM is the part. The 475LM EverCharge unit and the 041A5893 housing are both discontinued.
4. Safety Sensors and Brackets
First part of number below corresponds to diagram number above:
Current parts — order these
| Ref | Part # | Description | Fits |
|---|---|---|---|
| S1–S2 | 041-0136 | Safety sensor eye kit — sending and receiving eyes, matched pair | All |
| S3–S4 | 041A5281-1 | Sensor extension brackets | All |
| — | 041-0155-000 | Safety sensor brackets, 2021 to present | All |
| — | 041B0873 | Sunblocker bracket — stops sunlight false-tripping the eye | All |
| — | Sensor Guards | Protective guards, sensors not included | All |
| — | 041B4494-1 | 2 conductor bell wire, 26 ft | All |
Superseded part numbers
The current eyes and brackets replace every earlier version, so there is no need to match your old part number — order the current part.
| Old Part # | Order Instead | Notes |
|---|---|---|
| 41A5034 | 041-0136 | Eye kit used 1997 onward, now superseded |
| 12B484 | 041A5281-1 | Square holed mounting bracket, discontinued |
| 12B485 | 041A5281-1 | Slotted mounting bracket, discontinued |
| 041A5266-1 | 041-0155-000 | Sensor mounting bracket, no longer available |
5. Remotes, Wall Controls and Door Hardware
First part of number below corresponds to diagram number above:
| Ref | Part # | Description |
|---|---|---|
| 01–02 | 893MAX | 3 button visor remote — universal replacement for all older remotes |
| 03 | 10A20 | 3V coin battery for the remote |
| 05 | 10A14 | 12V battery — 61LM series remotes |
| 06 | 041B4494-1 | 2 conductor bell wire, 26 ft |
| 07 | 041A4353 | Header bracket, 1993 to current |
| 07 | 041A4353-1 | Header bracket, black — belt drive units |
| 08 | 041A5047 | Door bracket |
| 08 | 041A5047-1 | Door bracket, black — belt drive units |
| 09 | 041A2828 | Manual release rope and handle assembly |
| 10 | 29C128 | Remote visor clip |
| 11 | 29B137 | Remote visor clip — 700 and 800 series remotes |
| 12 | 041A4166 | Lighted pushbutton, two wire |
| 13–15 | 889LM | MyQ control panel — the replacement on 1998 and newer openers, which includes all four models on this page |
| 16 | 041B0035B | Curved door arm |
| 17 | 4178B0034B | Straight door arm section |
| — | 041A4202-6B | Wall control panel, two wire |
| — | 041A8094 | Door arm kit — curved and straight sections together |
| — | 041A2770-17 | Installation hardware kit — bolts, staples, grease, release cord |
| — | 041A3504 | Antenna extender kit |
| — | 041A3504-1 | Antenna extender kit with adapter |
| — | L6950 | Multi purpose spray lube, green |
| — | L6960 | Multi purpose spray lube, blue |
Remote controls
The original remotes for these openers are discontinued. The 893MAX is the universal replacement and works with all the older LiftMaster, Chamberlain and Craftsman openers. It covers 371LM, 971LM, 973LM and 893LM, and is the listed substitute for 81LM, 83LM, 63LM, 753CB, 850CB, 853CB, 953CB, 953EV and Craftsman 53680, 53859 and 53879. Browse all LiftMaster remote controls.
Wall controls — superseded part numbers
| Old Part # | Order Instead | Notes |
|---|---|---|
| 98LM | 889LM | Motion detecting control panel, discontinued |
| 398LM | 889LM | Control panel, discontinued |
| 888LM | 889LM | Control panel, discontinued |
More LiftMaster Parts
Belt drive rail and belt parts · All LiftMaster opener parts · LiftMaster remote controls