BMW 1 2 Series F21 F22 Wiring Passenger Side Loom Front Door Left N/S 9340998

BMW F21 F22 Front Left Door Wiring Harness is a factory part from the Cables, Harnesses, and Connectors category, designed for installation in the front left door of BMW F21/F22 vehicles. The original design ensures proper routing of electrical signals within the door, contributing to stable operation of window regulators, the lock, and other components.

Specifications and technical data

• SKU: 9340998
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9340998
• Substitutable numbers: 61129340997, 9340997, 9340998
• Location on the vehicle: Front, Left
• Category: Wiring Harnesses, Cables & Connectors

Vehicle Application and Placement

The presented harness is designed for installation in the front - left side area, specifically in the driver's door of compatible BMW models. The geometry of the wires, segment lengths, and connector placement are adapted to the factory mounting points in the door and the A-pillar, facilitating installation and minimizing the risk of wire strain.

Thanks to its dedicated design for a specific side of the vehicle, the harness maintains the correct electrical installation path, minimizing the possibility of damage caused by improper wire routing through the door grommet between the door and the body.

Door Harness Construction and Function

The door harness is responsible for connecting modules and electrical components located in the door to the vehicle's main wiring system. This includes, but is not limited to:

• powering and controlling electric window regulators,
• operating the central locking system and any sensors in the lock mechanism,
• transmitting signals to control buttons in the door panel,
• communicating with comfort modules and other door equipment.

A properly selected door harness helps maintain signal stability, reduces voltage drops, and supports correct interaction with factory BMW control units. This is particularly important in vehicles equipped with advanced comfort and safety systems.

Benefits of Using an Original BMW Harness

Using a harness specifically designed for a particular BMW model offers a range of practical installation and operational benefits:

• Factory Fitment – connectors, wire lengths, and mounting points match the original installation, making installation easier without modifications.
• Compatibility with Vehicle's Electrical System – maintains compatibility with control modules and the electrical architecture of the F21/F22 series.
• Reduced Electrical Faults – proper wire routing in grommets and clips minimizes the risk of chafing, breaks, and short circuits.
• Professional Service Outcome – repairs performed with an original harness are closer to factory standards than universal solutions.

Product Condition and Service Application

The offered door wiring harness is a used part, making it an attractive cost-effective alternative to new components while retaining the original BMW specification. This is a good solution for post-accident repairs, replacing damaged door wiring, or restoring the functionality of the comfort system after a wiring failure.

Before installation, standard verification of connector condition and wire insulation is recommended, followed by installation according to BMW service procedures, ensuring proper harness routing in factory brackets.

Harness Selection and Additional Materials

To correctly select the harness for a specific equipment version, pay attention to manufacturer markings, connector configuration, and vehicle placement. If in doubt, compare the existing door wiring with the offered part before final installation.

If you are looking for other BMW Cables, Harnesses, and Connectors, check out the BMW Cables, Harnesses, and Connectors available in our store to select parts that match other electrical circuits in your car.

For a comprehensive approach to repairs within the powertrain and associated systems, you can also consult the advice contained in the article Clutch and Dual-Mass Flywheel – Diagnostics and Part Selection for the Powertrain, which helps to better plan service work on your vehicle.