Original Volkswagen VW Audi 40-Pin Quadlock Radio Wiring Harness Connector Pigtail RC OEM

$ 29.95

Volkswagen and Audi 40-pin Quadlock radio wiring harness

Replacement OEM Original VW/Audi 40-pin Quadlock radio connector with attached wiring for compatible Volkswagen and Audi factory audio systems.

This connector may be used to repair a damaged or missing factory radio plug, create a test harness, restore a previously modified audio harness or complete a custom factory-radio installation.

This is a wiring pigtail—not a complete plug-and-play aftermarket radio adapter. Installation requires proper wire identification, splicing, soldering or crimping.

Product details

Application: Volkswagen and Audi factory radio wiring
Connector family: VAG/PQ 40-pin Quadlock
Connector configuration: 16-pin main section plus two 12-pin accessory sections
Locking method: Integrated rotating locking lever
Main functions: Power, ground, CAN communication and speaker connections
Accessory sections: Blue and green 12-pin removable inserts
Speaker insert: Beige/yellow 8-pin section
Wiring protection: Factory-style cloth loom
Placement: Behind the dashboard radio or navigation unit
Type: Replacement radio connector and wiring pigtail
Quantity: One harness/connector assembly
Condition: Please refer to the photographs for the exact condition

The Volkswagen Group connector housing commonly associated with this design is from the 3B7 035 444 / 3B7 035 444 A family. These numbers identify the connector-housing family and should not be represented as the complete wiring-harness part number unless they are physically stamped on this item.

The connector-housing documentation identifies:

Main housing: 3B7 035 444
Beige speaker insert: 3B7 035 447
Blue accessory/CD Changer insert: 3B7 035 447 A
Green telephone/line-output insert: 3B7 035 447 B

These are housing-component references rather than a complete harness part number.

Compatible Volkswagen radios

The connector style is commonly used with PQ-generation Volkswagen radios and navigation units, including certain versions of:

RCD 200
RCD 210
RCD 300
RCD 310
RCD 500
RCD 510
RNS 300
RNS 310
RNS 315
RNS 510
MFD2 and RNS2
Premium 7 and Premium 8 radios

Radio model, connector shape and terminal assignment must be compared before installation.

Compatible Audi radios

The connector style is commonly used with Quadlock-equipped versions of:

Audi Chorus II+
Audi Concert II+
Audi Concert III
Audi Symphony II+
Audi Symphony III
Audi RNS-E

It is not automatically compatible with every radio bearing one of these names because Audi changed connectors and audio-system architecture according to model, production date and equipment.

Volkswagen compatibility guide

Common physical-connector applications may include:

Volkswagen Amarok, approximately 2010–2015
Volkswagen Beetle 5C, approximately 2012–2015
Volkswagen Caddy 2K, approximately 2004–2015
Volkswagen CC, approximately 2009–2015
Volkswagen Eos, approximately 2007–2015
Volkswagen Golf, Rabbit and GTI Mk5/Mk6, approximately 2005–2014
Volkswagen Golf/Jetta SportWagen, approximately 2006–2014
Volkswagen Jetta Mk5/Mk6, approximately 2005–2015
Volkswagen Passat B6/B7, approximately 2006–2015
Volkswagen Polo 6R, approximately 2009–2014
Volkswagen Scirocco, approximately 2008–2015
Volkswagen Sharan 7N, approximately 2010–2015
Volkswagen Tiguan 5N, approximately 2008–2015
Volkswagen Touran 1T, approximately 2003–2015
Volkswagen Touareg 7L with a compatible factory radio
Volkswagen Transporter, Caravelle and Multivan T5, approximately 2003–2015

The connector must be compared with the original because radio equipment changed within the listed model years.

Audi compatibility guide

Common physical-connector applications may include:

Audi A1 8X with a compatible Quadlock radio
Audi A3/S3 8P, approximately 2003–2013
Audi A4/S4/RS4 B6/B7 with a Quadlock-equipped radio or RNS-E
Audi A4/S4 B8 with a compatible Concert or Symphony system
Audi A5/S5 8T/8F with a compatible non-MMI radio
Audi Q3 8U with a compatible Quadlock radio
Audi Q5 8R with a compatible non-MMI radio
Audi TT/TTS/TTRS 8J, approximately 2007–2014
Audi R8 Type 42 with a compatible Quadlock radio

Some Audi vehicles use amplified, BOSE or fiber-optic audio systems that require additional wiring or an electronic interface.

Important compatibility information

This connector shell was used with several different pin arrangements. Physical fit does not guarantee electrical compatibility.

Before installation, confirm:

The original vehicle or radio uses the older 40-pin PQ Quadlock connection
The locking lever and connector keying match
Every populated terminal is in the correct position
The speaker system is compatible with the populated speaker terminals
The radio uses the correct CAN-high and CAN-low connections
The vehicle does not require an unsupported factory-amplifier or fiber-optic connection
The radio is not a later 52-pin MQB/MIB unit

Do not connect wires according to color alone. Wire colors and pin assignments can differ between Volkswagen, Audi, vehicle generations and audio packages.

Not compatible with

Later 52-pin MQB/MIB Volkswagen or Audi radios
MIB radios with the main control unit located in the glove compartment
Early vehicles using separate ISO power and speaker plugs
Audi MMI 2G, MMI 3G or other systems that rely on a separate fiber-optic MOST control unit
BOSE, Dynaudio, Fender or other amplified systems unless the necessary line-level, amplifier-activation and CAN connections are present
Radios with a physically different Quadlock keying arrangement

Aftermarket radio installation

When installing an aftermarket radio, additional components may be required:

CAN-bus interface for switched accessory power
Steering-wheel-control interface
Factory-amplifier retention interface
Powered antenna or dual-Fakra antenna adapter
Reverse, speed and illumination signal interface
USB, AUX, microphone or satellite-radio adapter
Dashboard installation kit

This pigtail by itself does not automatically retain steering-wheel controls, factory amplification, navigation, parking-sensor audio, vehicle settings or antenna power.

Package contents

One 40-pin Quadlock radio connector
Attached wiring and cloth-covered loom shown in the photographs
Beige/yellow, blue and green terminal inserts as pictured

Radio, antenna adapters, CAN-bus modules, installation instructions and additional connectors are not included unless separately shown.

Installation

Professional installation is strongly recommended. Disconnect the vehicle battery before working on the radio wiring.

Use the wiring diagram for the specific vehicle and radio. Verify every terminal with the correct service information and electrical test equipment before applying power. Incorrect wiring can damage the radio, amplifier, CAN-bus modules or vehicle electronics.