Ford Focus Mk3 Door Lock Mechanism Mount Bracket Front Left N/S BM51-A21979-AB

The Ford Focus Mk3 Left Front Door Latch Mechanism Mounting Bracket is a component from the Locks and Latches category, designed for installation on the driver's side. The original Ford design ensures a proper fit to the body and stable seating of the latch mechanism in the door.

Specifications and technical data

• SKU: RHD-1713742
• Mark: Ford
• Condition: Used
• OEM Part Number: BM51-A21979-AB
• Substitutable numbers: BM51-A21979-AB, BM51A21979AB, 1713742, BM51-A21979-AA, BM51A21979AA, BM51-A219A65-DH, BM51A219A65DH
• Location on the vehicle: Front, Left
• Part type: Door Lock
• Category: Exterior Locks & Lock Hardware

Vehicle Application and Placement

The presented latch mechanism mounting bracket has been designed for use in the front left door of the vehicle. Its placement in the latch mounting area allows for secure support of the entire mechanism and maintains the correct geometry for the operation of rods and levers.

This component is dedicated to the third-generation Ford Focus, which translates to:

• factory fit to the door structure – no need for modifications or adjustments to mounting holes,
• stable mounting of the latch mechanism – reduction of play and unwanted vibrations during operation,
• correct cooperation with the original latch and rods – maintaining proper operation of the handle and central locking.

Bracket Design and Function

The bracket plays a crucial role as a load-bearing mounting element for the door latch mechanism. It is responsible for the correct positioning of the latch assembly relative to the door panel and pillar, which directly impacts:

• smooth door locking and unlocking,
• maintaining seal and proper door closure,
• reducing loads transferred to the latch mechanism itself.

Thanks to the use of the original bracket geometry, forces acting during door opening and closing are distributed predictably, contributing to the longer lifespan of the entire locking system.

Product Characteristics and Condition

The offered bracket comes from the Ford line and is a used part. This means it is an original component that has been previously used but retains the functionality required for further use. In practice, this translates to:

• dimensional compatibility with the factory latch mechanism,
• retention of mounting points and guides according to the manufacturer's design,
• possibility of installation as a replacement for a damaged bracket without interfering with the door structure.

The used nature of the part is beneficial for users seeking an economical solution while maintaining the original installation specifications.

Benefits of Using an Original Latch Bracket

Replacing a damaged or deformed latch mechanism mounting bracket with an original part offers a range of practical benefits:

• restoring proper door closure – eliminating problems with doors not closing fully or requiring forceful slamming,
• stable operation of the central locking system – correct positioning of the mechanism reduces the risk of jamming,
• maintaining factory clearances and tolerances – which affects acoustic comfort and the durability of moving parts.

For workshops and individual users, this means easier diagnostics and faster installation, without the need to adapt non-original solutions.

Selection and Additional Information

Before purchasing, it is advisable to compare the bracket's design with the currently installed part in the door, paying attention to the shape, hole arrangement, and method of latch mechanism mounting. Data such as the OEM part number or interchangeable numbers, available in the product's technical specifications, may also be helpful.

If you need other parts from the Ford Locks and Latches category, check out the Ford Locks and Latches available in our store to select a complete solution for your vehicle.

You can find more information on when it's worth choosing a used part versus considering a refurbished one in the article: Refurbished or Used Original – Which Part to Choose for Repairs?