text.skipToContent text.skipToNavigation

LiftMaster’s response to COVID-19 click here to learn more

Home > Accessories and Parts > Parts > 4178B0034B


Straight Door Arm

4178B0034B is a straight door arm replacement kit. The straight arm when paired with the curved arm, connect the garage door to the garage door opener trolley. This straight door arm section is compatible with most residential garage door openers. Check the manual for model number before ordering to ensure compatibility.

CAD $10.01


Control Panels

Program Easily

Directly controls Wi-Fi garage door openers and myQ-enabled accessories.

Automatic lighting

Motion-detecting control panel turns on the opener's lights.

Adjustable Light Timer

Sets the amount of time before the light turns off after use.

Setup & Support

Replacement Parts


info California Residents: Proposition 65 WARNING