Car audio Bluetooth AUX audio cable adapter for Citroen Peugeot vehicles with Blaupunkt VDO Bosch RD4 head units Bluetooth 5.0 compatible cable and microphone kit for streaming music and hands-free calls
Citroen Peugeot RD4 Bluetooth Audio Cable Adapter for Wireless Music and Calls

This car audio Bluetooth AUX cable adapter provides a direct interface solution for upgrading specific Citroen and Peugeot vehicles with older factory-fitted audio systems. It connects to the existing wiring harness designed for the original CD changer, allowing you to stream music wirelessly from your smartphone or other Bluetooth devices and make hands-free calls. The kit uses a modern Bluetooth 5.0 chipset, noted for its improved data transfer speeds and stable connection, which helps maintain audio quality. This product is designed for a practical, do-it-yourself installation that revives the functionality of compatible Blaupunkt, VDO, and Bosch RD4 head units without requiring a full stereo replacement.
Features and Construction

This adapter is engineered to match the electrical specifications and physical connectors of particular factory head units. Its design focuses on compatibility and core functionality, translating a digital Bluetooth signal into an audio format your car's stereo can process.
Material and Build
The product's performance centres on its internal electronic components. It utilises a Jerry Bluetooth main control chip, which forms the core of its operation. This chipset supports the Bluetooth 5.0 standard, facilitating a wireless connection that aims for high-speed transmission to minimise audio lag and potential distortion. The build is tailored to interface precisely with the specific pin configurations found in the RD4 head units from manufacturers Blaupunkt, VDO, and Bosch.
Size and Practical Fit
While exact physical dimensions are not specified, the product is designed as a cable and interface kit that must fit behind the dashboard of your vehicle. Successful installation requires removing the factory stereo to access the correct port for connection. The electrical specification is clearly defined with a product voltage range of 5-12V, aligning with standard automotive electrical systems to ensure safe operation without the need for additional power converters.
Uses and Placement

This adapter serves a clear purpose: to add modern wireless connectivity to vehicles that originally came with a wired-only audio system. It bridges the gap between older car technology and current personal devices.
Event or Professional Use
For professional drivers, ride-share operators, or anyone who spends significant time in their vehicle, the hands-free calling capability facilitated by the included microphone is a key feature. It allows for safer communication by routing call audio through the car's speakers, keeping your hands on the wheel and attention on the road. The stable Bluetooth 5.0 connection is also beneficial for reliable audio streaming during long journeys.
Everyday Home Use
For daily commuting and personal use, the primary benefit is the convenience of wireless music playback. You can easily stream podcasts, navigation instructions, and music playlists directly from your phone to your car's speakers without needing a physical aux cable. This transforms the in-car experience for compatible Citroen and Peugeot models, making the factory stereo feel more contemporary.
Benefits and Buying Value

The value of this product lies in its targeted functionality and cost-effective approach to car audio upgrading. It addresses a specific compatibility need rather than offering a generic solution.
Reuse and Low Maintenance
This solution promotes the reuse of your vehicle's existing, often high-quality, factory stereo and speaker system. There is no need to dispose of the original head unit or wire in a new aftermarket one, which can be a more complex installation. Once fitted, the adapter requires minimal maintenance—it draws power when the car is on and connects automatically to your paired device.
Why Choose This Product
Choose this adapter if you own a listed Citroen or Peugeot model with a confirmed Blaupunkt, VDO, or Bosch RD4 head unit and wish to retain the original stereo's look and integrated controls while adding Bluetooth. Its clear compatibility list helps you assess fitment before purchase. The inclusion of Bluetooth 5.0 technology offers a more reliable and higher bandwidth connection compared to older Bluetooth versions, which is a concrete advantage for audio quality and connection stability during use.


