Door Lock BMW F40 G20 G21 System Latch Rear Left Complete Catch 7445053

Door Lock BMW F40 G20 G21 System Latch Rear Left Complete Catch is an original component from the Locks and latches group, designed for installation in the rear left door of BMW F40, G20, and G21 series vehicles. The lock's design is adapted to factory mounting points, which facilitates installation and ensures proper cooperation with the door handle mechanism, linkages, and the vehicle's electrical system. It is a practical solution for users who want to restore full door functionality while maintaining factory safety standards.

Specifications and technical data

• SKU: 7445053
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7445053
• Substitutable numbers: 7445053, 51227445053, PK
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and vehicle placement

The presented lock is dedicated for installation in the rear left door, which means its geometry, mounting points, and the way it interacts with the locking mechanism are optimized specifically for this part of the body. As a result, the component works correctly with the factory opening mechanism from both the inside and outside, as well as with the vehicle's central locking system.

Such a fit reduces the risk of play, improper closing, or excessive wear of other door components, which is important for both user comfort and the tightness and acoustics of the cabin.

Technical and functional characteristics

The lock belongs to the Locks and latches group, which are components responsible for the mechanical and electrical securing of the doors. The design provides for cooperation with the vehicle's factory locking system, enabling:

• stable door locking in the closed position,
• smooth unlocking using the internal or external handle,
• integration with the central locking system and control from the remote or the vehicle interior.

A properly selected rear left door lock helps maintain the correct closing geometry, which translates into reducing rattles, vibrations, and unwanted noises while driving.

Benefits of using an original BMW lock

Using an original lock dedicated to specific BMW F40, G20, and G21 models provides a number of practical benefits:

• Factory fit – compatibility with the door structure and other locking system components,
• consistent cooperation with the vehicle's electronics, without the need for installation modifications,
• maintenance of original safety and comfort parameters.

The element from this group is particularly useful for repairs after collisions, problems with door closing, or failures of the locking mechanism when maintaining the original vehicle specification is a priority.

Condition and service application

The offered lock comes from the used parts segment, which allows for an economical repair while maintaining the original BMW construction. This is a solution often chosen by workshops specializing in the brand and users who prefer components from dismantling over replacements of unknown origin.

Before installation, it is recommended to perform a standard verification of the mechanism's operation and check the cooperation with the door wiring harness to ensure trouble-free operation after installation.

Expanding repairs within the BMW locking system

If you are planning a comprehensive repair or modernization of the door area in your BMW and need other elements from the same group, such as locking mechanisms, cylinders, or additional mounting elements, check the available parts in the BMW Locks and latches category.

If you are interested in a broader context of using premium-class used components and want to learn about the advantages of using original parts from dismantling in higher-segment vehicles, it is worth reading the article: Used parts for Mercedes – original components from dismantling.