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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design91.uk/images/schemaLogo.png https://www.design91.uk/images/schemaLogo.png +443456003478 https://www.design91.uk Facebook Instagram
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Porsche > 996 (911) (1997-2005) > 996 TURBO 2000-05 > Incar / Multimedia >

Add-on AUX interface

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MOST Aux Adapter. Porsche 911 (996/997) / 986/987 Boxster / Cayenne
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MOST Aux Adapter. Porsche 911 (996/997) / 986/987 Boxster / Cayenne
CTVPO001
Product Information
Product Information
MOST Aux Adapter.
Vehicles with PCM 2.0/2.1. MOST ring requires activating if not already enabled.

Fits:
Porsche 911 (996/997)
Porsche 986 / 987 Boxster
Porsche 987 Cayman
Porsche 955 Cayenne

Features & Benefits:
• Plug and play, no cutting of wires required
• Allows connection of any audio device with 3.5mm headphone or RCA socket
• Please check the connections in the vehicle match the harness you are purchasing

For Installation Instructions CLICK HERE
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About Add-on AUX interface

Porsche Add-On AUX Interfaces - Simple Audio Input for Factory Multimedia Systems

Porsche Add-On AUX interfaces allow external audio devices—such as smartphones, MP3 players, or portable media sources—to connect directly to the factory infotainment system via a 3.5mm auxiliary input. Designed to retain the original head unit and interior appearance, AUX interfaces provide a straightforward, reliable solution for adding external audio playback to Porsche multimedia systems.

Available from Design911, Add-On AUX interfaces are ideal for restoring lost connectivity or upgrading older Porsche audio systems without replacing factory components.

What Do Porsche Add-On AUX Interfaces Do?

Add-On AUX interfaces enable analogue audio input through the factory sound system.

Core Functions:

  • Connect external audio devices via AUX input
  • Play music through factory speakers
  • Retain OEM head unit and controls
  • Provide a simple, plug-and-play audio solution
  • Preserve factory interior appearance

They offer an easy way to expand audio functionality in vehicles without Bluetooth or USB support.

Why Do Add-On AUX Interfaces Fail?

AUX interfaces rely on wiring, connectors, and analogue signal paths that can degrade over time.

Common Causes of Failure:

  • Worn or damaged AUX cables or connectors
  • Internal wiring fatigue from vibration
  • Oxidation or corrosion at connection points
  • Compatibility issues with updated infotainment systems
  • Damage during previous audio installations

Failure may result in crackling audio, intermittent sound, or complete loss of input.

When Should an Add-On AUX Interface Be Replaced?

  • Porsche Add-On AUX interfaces should be replaced when:
  • Audio signal becomes intermittent or distorted
  • External devices are no longer recognised
  • AUX input stops producing sound
  • Upgrading to improved audio integration solutions
  • Diagnosing unexplained sound input faults

Replacing a faulty interface restores clean, reliable external audio playback.

Highlights

  • OEM-style Porsche audio input solutions
  • Enables external audio playback via AUX
  • Retains factory head unit and appearance
  • Simple, reliable plug-and-play installation
  • Ideal for audio system refresh or repair       

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