Garage Door Openers · parts
LiftMaster 8165 parts: keep the base AC model separate from 8165W
For the exact base LiftMaster 8165, the OEM parts page identifies a discontinued 1/2-HP AC chain-drive opener and lists 045ACT and 045ACTMC Security+ 2.0 receiver-board entries, safety sensor kit 041A5034 with bracket kit 041A5266-3, and remote controls G893LMMC and G891LMMC. The 045ACT and 045ACTMC part pages separately list 8165, with the 045ACTMC page limiting that replacement board to compatible models manufactured after 2011. The related 8165W page lists Wi-Fi board 050ACTWFMC instead. Verify the complete model string, part label, and manufacture details; do not infer board or radio compatibility from the shared “8165” digits.
Safety boundary
- Read the full opener label and use the exact 8165 owner manual; do not open the powerhead to inspect a board or wiring.
- If safety sensors are damaged or unavailable, do not bypass them or force automatic closing. Contact LiftMaster or a qualified technician for a verified compatible replacement.
- No internal electrical, powerhead, spring, cable, shaft, balance, or door-hardware repair is described.
Compatibility requires a direct model listing, explicit supersession, or equivalent manufacturer evidence.
Models explicitly covered
These model identities have the source evidence listed below. Read the part decision and suffix limits before ordering.
Required identifiers
- Complete opener label exactly 8165, without a trailing W or another suffix
- Visible accessory/remote part label and the opener’s build/serial details for board selection
- Sensor and bracket labels if safely visible without moving door hardware or opening the powerhead
Compatibility rules
- The exact LiftMaster 8165 page lists boards 045ACT and 045ACTMC, sensor kit 041A5034, brackets 041A5266-3, and remotes G893LMMC/G891LMMC under base model 8165.
- The 045ACT OEM part page directly lists 8165 as compatible and states the part is discontinued; the 045ACTMC page also lists 8165 and limits the replacement board to compatible models manufactured after 2011.
- The exact 8165W parts page lists receiver logic board 050ACTWFMC and identifies a Wi-Fi model; do not transfer that board entry to base 8165.
- The 041A5034 OEM sensor page lists 8165 as compatible, states that the sensor kit is discontinued, and warns it is not a replacement for 041A4373A sensors.
Never assume
- Base model 8165 and Wi-Fi model 8165W share the same receiver board, controls, or remote pairing flow.
- A Learn-button color alone proves a replacement board or remote is suitable for a particular manufacture date.
- 045ACTMC is a universal replacement for every 8165 build; the part page says after 2011 only.
- 041A5034 fits every sensor head that looks similar or replaces older 041A4373A sensors.
Exact 8165 model and listed parts
LiftMaster’s exact parts page displays 8165 as a discontinued 1/2-HP AC chain-drive opener. It lists Security+ 2.0 board IDs 045ACT and 045ACTMC, remote models G893LMMC and G891LMMC, and sensor kit 041A5034 with bracket 041A5266-3.
Board selection is build-sensitive
LiftMaster’s 045ACT and 045ACTMC part pages name model 8165. The 045ACT page marks that part discontinued; the 045ACTMC page describes a replacement board for compatible openers manufactured after 2011. Ask LiftMaster support to verify build details and current replacement applicability before ordering.
Do not transfer the Wi-Fi model’s board
The separate 8165W parts page lists Wi-Fi board 050ACTWFMC. The W suffix indicates a distinct model listing; this record’s base 8165 parts do not establish any 8165W fit.
Sensor part status and boundary
LiftMaster’s 041A5034 page names 8165 as compatible and marks the kit discontinued. It also says 041A5034 is not a replacement for 041A4373A sensors. Never bypass a required safety sensor; have an exact replacement checked by LiftMaster or a qualified technician.