BMW E90 E90N E91 E92 E93 LCI Wiring Loom AUX 375MM 6940237 9172021

BMW E90 E90N E91 E92 E93 LCI Wiring Loom AUX 375MM is an original BMW audio installation component, designed to route an external signal to the factory multimedia system. Thanks to the precisely selected cable length and the factory AUX socket, this solution allows for an aesthetic and technically correct connection of audio sources without interfering with the electrical harness. It is a practical choice for drivers and workshops that want to maintain installation consistency with manufacturer solutions and keep the vehicle interior in an orderly state.

Specifications and technical data

• SKU: 9172021
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6940237
• Substitutable numbers: 61126940237, 6940237, 61129172021, 9172021
• Category: Other Interior Parts & Accessories

Purpose and function of the AUX cable

The presented cable with an AUX socket has been designed as an audio installation component for BMW E90 and E92 series vehicles, where it enables the routing of a line-level signal from external devices (e.g., a portable player or other audio source) to the factory radio or head unit. Using a dedicated cable with a pre-installed socket allows for a stable connection, reduces interference, and maintains the correct audio path impedance, which translates into predictable sound quality.

The cable length has been selected to allow for convenient routing within the center console or tunnel, without excessive tension or the need to coil excess cable. This ensures a tidy installation and limits the risk of abrasion or accidental damage to the cable during vehicle interior use.

Advantages of using an original BMW cable

Using an original cable with an AUX socket in a BMW brings a number of technical and practical benefits:

• compatibility with the factory audio installation without the need for harness modifications,
• stable signal connection, reducing the risk of crackling and transmission interruptions,
• aesthetic integration of the AUX socket into the interior elements, avoiding makeshift solutions,
• easier diagnostics and future service thanks to the preservation of the original installation architecture.

For workshops and service centers, it is also important that the cable complies with factory specifications, which facilitates part selection by catalog numbers and helps maintain consistent service documentation. This is particularly important for vehicles where the owner expects to maintain a configuration close to the factory state.

Used condition and installation aspects

The item is offered in used condition, which in practice means it has been removed from a vehicle and was previously in operation. For signal cables of this type, it is crucial to ensure electrical continuity and the absence of mechanical insulation damage in areas prone to bending. Before installation, a standard visual inspection and conductivity check are recommended to confirm proper operation in the specific installation.

The installation of the AUX cable in a BMW E90/E92 is typically carried out by routing the harness along existing cable paths in the center tunnel or console, while maintaining factory mounting points. As a result, the cable does not interfere with seat adjustment mechanisms, the handbrake, or tunnel elements, and the AUX socket can be placed in the location intended by the manufacturer, which improves ergonomics.

Part matching and installation compatibility

The cable with an AUX socket is part of the original BMW component group, which facilitates its identification via catalog numbers and integration with the vehicle's existing electrical system. For users and workshops, this means the ability to precisely match the component to a specific equipment configuration without the need for universal adapters or converters. In practice, this translates into a more predictable installation and a lower risk of compatibility issues.

If you are planning a comprehensive repair or upgrade of the electrical and multimedia area in your BMW and need other parts from the same group, such as additional harnesses, connectors, or signal adapters, check out the available parts in the Other BMW category.

Technical support and part selection

Selecting the correct AUX cable for a specific BMW equipment version may require verification via catalog numbers or the audio system configuration. In the case of expanding the installation with additional features, such as integration with other signal sources, it is worth using reliable guide materials. When comparing solutions used by different manufacturers and analyzing the impact of installation components on the operation of drive and braking systems, the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses design differences using sports models as an example, may be helpful.

If you want to approach the purchase of used parts consciously and learn best practices for verifying the condition and compatibility of parts, it is worth reading the guide Safe purchase of used car parts online – a step-by-step guide, which describes, among other things, strategies for selecting components by OEM numbers and practical tips for workshops and individual users.