LiftMaster 41D4509 Motor and Bracket Assembly
The LiftMaster 41D4509 is a motor and bracket replacement assembly used in select ATS-style residential garage door opener repairs. It is commonly supplied as a complete service package that may include the motor, worm gear, bearing, grease tube, and bracket-mounted hardware needed to restore the main drive section on compatible openers.
This kit is not a universal motor. ATS opener families have specific motor brackets, gear alignment, and internal hardware requirements. Installing a similar motor assembly that does not match the original parts diagram can create gear misalignment, noise, premature wear, or a no-run condition.
Compatible With
Compatibility is commonly associated with LiftMaster ATS211 series applications and related ATS references when the parts diagram confirms 041D4509 / 41D4509.
- LiftMaster ATS211 garage door opener applications when confirmed by parts diagram
- Select ATS-series residential opener motor and bracket repairs
- LiftMaster applications listing 041D4509 or 41D4509
- Related motor/bracket service applications using K75-16424 reference
- Applications using related bracket references 123D0155 or 123D155
Compatibility note: Some online references mention ATS211 while others mention ATS212 in product titles. Match the original motor label and opener parts diagram before upload or fulfillment.
Features and Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Motor and bracket assembly |
| Part Number | 41D4509 |
| Related Number | 041D4509 |
| Application | ATS-series garage door opener motor repair |
| Common Model Reference | ATS211 when confirmed by parts diagram |
| Included Components | Motor/bracket assembly; related references list worm gear, bearing, and grease tube |
| Drive Type | Residential opener internal drive assembly |
| Notes | Verify model number, bracket style, and original part number |
Also Known As / Related Part Numbers
Technician Note
The bracket and drive hardware matter as much as the motor itself. If the motor runs but the opener grinds, chatters, or skips, inspect the gear case and drive parts instead of replacing only the motor section blindly.
Before Ordering Checklist
- Confirm the opener model is ATS211 or another model that lists 041D4509 / 41D4509.
- Compare the old bracket and motor assembly before installation.
- Check whether the old motor label references K75-16424, 123D0155, or 123D155.
- Inspect the gear case, worm gear, and door balance before reusing related parts.
- Do not substitute for unrelated LiftMaster 1/2 HP or 3/4 HP motor kits.
Professional Advisory
Motor replacement involves internal opener wiring, moving drive parts, and door balance checks. Disconnect power before service, do not bypass safety devices, and use a qualified garage door technician if the diagnosis involves overheated wiring, damaged harnesses, unsafe door movement, or a door that will not stay balanced by hand.
Product Questions and Answers
What opener is the 41D4509 commonly used with?
It is commonly associated with LiftMaster ATS211 series garage door openers when the opener parts diagram calls for 041D4509 or 41D4509.
What related numbers should I compare?
Common related references include 041D4509, 41D4509, K75-16424, 123D0155, and 123D155.
Is this only the motor?
No. It is a motor and bracket assembly, and related kit listings may include drive hardware such as a worm gear, bearing, and grease tube.
Can I use this on a different LiftMaster opener?
Only if that opener's parts diagram lists the same replacement part. Other LiftMaster motors may use different brackets, gears, or wiring.
Why is there an ATS211/ATS212 concern?
Some product references online use different ATS wording. The safe way to order is by matching the opener model label and the exact replacement part number in the parts diagram.
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