Ford Mondeo Mk4 Door Lock Keyless Power Lock Latch Front Left N/S 8S7AA21813FA

Ford Mondeo Mk4 Door Lock Keyless Power Lock Latch Front Left N/S is an original locking system component designed for installation on the driver's side. Thanks to its integration with the central locking and keyless system, it ensures consistent mechanical and electrical operation, which translates into user convenience and proper cooperation with the vehicle's electronics.

Specifications and technical data

• SKU: RHD-8S7AA21813FA
• Mark: Ford
• Condition: Used
• OEM Part Number: 8S7AA21813FA
• Substitutable numbers: 8S7A-A21813-FA, 8S7AA21813FA, 1791400, 8S7A-A21813-FB, 8S7AA21813FB
• Location on the vehicle: Front, Left
• Category: Interior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock is dedicated to the front left door of the Ford Mondeo Mk4 and operates within the factory central locking and comfort system. The component is responsible for:

• mechanical locking and unlocking of the driver's side door,
• cooperation with the keyless entry system,
• transmitting signals to the vehicle's control modules,
• maintaining proper door positioning relative to the body.

Thanks to its precise fit to the door structure, the lock ensures stable closing and predictable operation of handles and internal mechanisms.

Construction and integration with the keyless system

The discussed lock belongs to the Internal locks and latches group, which means it combines a mechanical part with elements that work with the vehicle's electrical installation. The design is intended for installation in the front left door, maintaining factory mounting points and routing of cables and wiring harnesses.

Integration with the keyless system allows for opening and closing the vehicle without using a traditional key, while maintaining appropriate feedback signals for the comfort module. Using an original lock allows for maintaining proper communication with the body electronics and reduces the risk of diagnostic errors.

Benefits of using an original Ford lock

Using an original Ford brand component in the door locking system brings a number of practical benefits:

• factory fit to the door and body structure,
• compliance with the operating parameters of the central locking and keyless system,
• proper cooperation with the vehicle's control modules,
• reduction of the need for installation modifications.

The used OEM component is a solution that allows you to maintain the original operating characteristics of the mechanism while optimizing repair costs.

Selection, installation, and technical fitment

Before installation, it is recommended to verify the compatibility of the lock with the specific body version and equipment of the Ford Mondeo Mk4, especially regarding the presence of the keyless system. Proper component selection facilitates subsequent installation and minimizes the risk of problems with door closing or communication with electronics.

During installation, it is important to maintain proper cable routing, correct seating of the lock in the door structure, and to check the operation of internal and external handles after completing the work. Thanks to this, the locking system remains tight, and the doors maintain a stable position relative to the bodywork.

Expanding the locking system in the Ford Mondeo Mk4

If you are planning a comprehensive repair or modernization of the door and lock zone in your Ford and need other elements from the same group, such as locking mechanisms, cylinders, or additional lock modules, check the available parts in the Ford internal locks and latches category.

If you are considering whether a new replacement or a used OEM element would be a better choice in your case, comparing costs and durability may be helpful – you can find a detailed discussion in the article New or used? A comparison of costs and quality of car parts.