BMW F20 F21 Tail Light Rear Lamp Plug Socket Wiring Left N/S 1-2141397-1

The BMW F20 F21 Rear Left Tail Light Wiring Harness Plug is an original electrical component designed to service the rear left tail light in 1 Series models. Thanks to its factory fit for the F20/F21 body, the harness ensures a secure electrical connection and proper integration with the lighting system. This is a practical solution for collision repairs, tail light replacements, or damage to the original wiring.

Specifications and technical data

• SKU: 1-2141397-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1-2141397-1
• Substitutable numbers: 63217359017, 7359017, 1-2141397
• Location on the vehicle: Rear, Left
• Part type: Rear Light Assembly
• Category: Rear Light Assemblies

Purpose and Fitment for BMW F20/F21

The presented wiring harness is designed for installation in the rear left tail light area of the BMW 1 Series F20/F21 generation. The construction with a precisely shaped plug and appropriate wire length allows for installation in original mounting points without requiring modifications to the existing wiring. This maintains compatibility with the factory electrical system and ensures correct operation of the vehicle's rear lighting functions.

Construction and Function of the Rear Tail Light Harness

The harness connects the vehicle's main electrical system to the left rear tail light. The tail light plug used is designed to fit the socket, minimizing the risk of loose connections, contact overheating, and power supply issues to individual bulbs or LED modules. The wires are routed to allow for safe placement within the trunk area, maintaining appropriate bending radii.

Application in the Rear Lights and Brake Lights Category

This component belongs to the Rear Lights and Brake Lights category, responsible for stable power supply to functions such as the parking light, brake light, turn signal, or reverse light – depending on the specific tail light configuration. A functional harness is crucial for the proper operation of the lighting system, eliminating common faults like flickering, intermittent light failure, or errors reported by the bulb failure monitoring system.

Characteristics of a Used OEM Part

The offered harness is a used original BMW part, meaning it retains factory geometry, correct wire gauge, and compatibility with the vehicle's electrical system. In practice, this translates to:

• a secure connection to the tail light and body wiring,
• no need for soldering or custom connectors,
• compliance with the electrical parameters specified by the manufacturer.

For many users and workshops, this is a convenient solution for post-accident repairs or replacing a damaged tail light when the original harness has been cut, melted, or mechanically damaged.

Benefits of Using an Original BMW Harness

Using an original wiring harness in a BMW F20/F21 minimizes the risk of compatibility issues and helps maintain the integrity of the entire lighting system. This is particularly important in vehicles equipped with advanced light control systems, where incorrect resistance or makeshift connections can generate errors. By choosing this part, you gain stable rear tail light operation and easier diagnostics of potential future faults.

If you are looking for other parts in the BMW Rear Lights and Brake Lights category, check out the BMW Rear Lights and Brake Lights available in our store to find a complete solution for your model.

You can find more practical information on why original, used electrical system components are often a better choice than aftermarket alternatives in the article 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement, which will help you make an informed purchasing decision.