Engine Wiring Mercedes W169 W245 Loom Cable Harness Injector Module A6401503733

Engine Wiring Mercedes W169 W245 Loom Cable Harness Injector Module is an original component from the Cables, harnesses and connectors group, designed for use in the engine compartment of A-Class and B-Class models. This used, factory-made harness ensures proper signal and power routing between engine unit components, which translates into stable operation of the engine control system.

Specifications and technical data

• SKU: A6401503733
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401503733
• Substitutable numbers: A6401503733, A 640 150 37 33, KZ
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function of the engine harness

The engine harness in Mercedes W169 and W245 models is responsible for the organized connection of sensors, actuators, and the engine control unit. A properly selected harness enables:

• stable power supply to components in the engine compartment,
• reliable transmission of control and diagnostic signals,
• preservation of the factory electrical system architecture.

By using an original component, compatibility with the factory installation design is maintained, which reduces the risk of electrical faults and communication issues between modules.

Benefits of using an original Mercedes harness

The original Engine Wiring Mercedes W169 W245 Loom Cable Harness Injector Module has been designed specifically for the electrical system of these models, taking into account wire lengths, connector placement, and mounting methods. In practice, this means:

• factory fitment to brackets and guides in the engine compartment,
• appropriate shielding and wire cross-sections selected for specific loads,
• use of connectors compatible with original sensors and modules.

This type of solution is particularly beneficial for repairs following mechanical or thermal damage to the installation, as well as for restoring full engine control system functionality after previous unprofessional modifications.

Characteristics of the Cables, harnesses and connectors category

Elements from the Cables, harnesses and connectors group are responsible for reliable electrical connections in the vehicle, which is why their selection has a direct impact on diagnostics, safety, and operational comfort. In the case of an engine harness, it is crucial to maintain:

• adequate resistance to temperature and vibrations in the engine compartment,
• correct wire routing to avoid chafing and short circuits,
• consistency with the vehicle's factory electrical diagram.

Using an original harness from this category reduces installation time and facilitates subsequent service and diagnostic work.

Condition, fitment, and service application

The presented harness is a used component, which in practice means the possibility of an economical repair while maintaining the original build quality characteristic of the Mercedes brand. This type of part is suitable both for standard replacement of a damaged installation and for comprehensive engine compartment rebuilding after a collision or thermal failure.

To further minimize the risk of error during selection, it is worth verifying compatibility using the OEM number and interchangeable numbers in the vehicle's service documentation or the manufacturer's catalog.

Selection support and additional resources

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional harnesses, wire sections, or compatible connectors, check out the available parts in the Mercedes Cables, harnesses and connectors category.

When selecting electrical installation components, the ability to work with OEM numbers and reference numbers is particularly helpful – you can find practical tips on how to safely buy online and verify component compatibility in the article Buying parts online without risk – 5 proven ways to verify component compatibility using OEM numbers and paint codes.