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LiftMaster/Chamberlain Replacement Model - 4178B0034B Straight Door Arm Kit for arage Door Openers

SKU 712-LMP-4178B0034B
Original price $43.69 - Original price $43.69
Original price $43.69
$99.40
$99.40 - $99.40
Current price $99.40

GarageDoorProject® exclusively partners with US vendors, ensuring 100% OEM parts with all-new production dates. LiftMaster 4178B0034B Straight Door Arm.

COMPLETE REPLACEMENT: This straight door arm replacement kit is designed for seamless compatibility with various LiftMaster and Chamberlain garage door openers.

STURDY CONSTRUCTION: Made from high-quality materials to ensure durability and reliable performance, even under frequent use.

VERSATILE COMPATIBILITY: Works with a wide range of LiftMaster and Chamberlain garage door opener models, including several discontinued models.

SIMPLE INSTALLATION: User-friendly design allows for quick and hassle-free installation, enabling you to restore functionality efficiently.

Product Description

LiftMaster 4178B0034B Professional-Grade Garage Door Arm Kit Black Metal Straight Door Arm For Chamberlain Openers | GarageDoorProject | 100% OEM | US Vendor

The garage door arm kit LiftMaster 4178B0034B Straight Door Arm is a professional-grade replacement designed to restore smooth and reliable operation to your LiftMaster or Chamberlain garage door opener. This durable metal door arm ensures a strong connection between the garage door opener trolley and the door itself, delivering consistent performance and long-lasting durability. Compatible with a wide range of models, including discontinued ones like the 8360W Battery Backup, this replacement garage door arm offers an easy garage door repair solution that saves time and money while maintaining OEM standards.


This straight door arm kit features robust metal construction that withstands daily wear and tear, preventing frequent breakdowns. The black metal door arm is manufactured to precise specifications for seamless compatibility with your existing garage door opener hardware. Installation is straightforward, allowing DIY enthusiasts and professionals alike to quickly replace worn or damaged components and restore full function without hassle. Backed by GarageDoorProject®'s reputation as a trusted US vendor supplying 100% OEM garage door opener parts, this hardware accessories kit guarantees quality and reliability.


Key features include:

- Compatible garage parts designed specifically for LiftMaster replacement arm needs
- OEM garage door components ensuring exact fit and optimal performance
- Durable metal door arm built to resist corrosion and mechanical stress
- Easy installation process reducing downtime for repairs or replacements
- Multiple part numbers (012385041783, 178B33, 178B34) for versatile identification
- Black metal finish matching most standard garage door openers
- Wide compatibility with Chamberlain door arm models and other hardware accessories kit items

Technical specifications:

- Product Name: Straight Door Arm
- Model Number: 4178B0034B
- Construction: Metal
- Color: Black
- Included Component: Straight Door Arm only

Restore your garage’s functionality with this replacement garage door arm that fits perfectly with your existing system. Whether you’re addressing routine maintenance or unexpected damage, this LiftMaster replacement arm provides a durable, compatible solution that keeps your garage door opener hardware operating smoothly. The sturdy design minimizes wear on connected components, extending the life of your entire garage system.


GarageDoorProject® offers this product with confidence backed by customer satisfaction and quality assurance as a leading US vendor of OEM parts. Choosing this replacement garage door arm means investing in a professional-grade component that supports easy garage door repair and reliable daily use. Keep your home secure and your garage functioning optimally by upgrading with this trusted straight door arm kit today.

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