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Kenwood eXcelon DMX709S

6.8" Double-DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto (Sirius XM Ready)

18

$499.99

List price $600.00

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Shop all 2003 Audi A4 Car Audio, Speakers, & Electronics

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Race Sport Accessories H11TLED

H11 Terminator Series Fan-less Shallow-mount LED Conversion Headlight Kit with Pinpoint Projection Optical Aims

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H11 Terminator Series Fan-less Shallow-mount LED Conversion Headlight Kit with Pinpoint Projection Optical Aims

• H11 Fan-less LED Conversion Headlight Kit
• IP67 waterproof rating
• 2000 lux / 2250 lumens per bulb
• See 2-3 times further than stock lighting systems
• Low-mounting depth base design

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This product fits your 2003 A4
Was $89.00 Details
$69.00

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• H11 Fan-less LED Conversion Headlight Kit
• IP67 waterproof rating
• 2000 lux / 2250 lumens per bulb
• See 2-3 times further than stock lighting systems
• Low-mounting depth base design

Metra 86-9001

1998-2006 Volkswagen/Audi/Mercedes Radio Removal Tool

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1998-2006 Volkswagen/Audi/Mercedes Radio Removal Tool

• Radio removal tool for select 1998-2006 Volkswagen, Audi, and Mercedes vehicles

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• Radio removal tool for select 1998-2006 Volkswagen, Audi, and Mercedes vehicles

GROM Audio AUDA1

Auxillary Cable Input Car Stereo Kit with 3.5mm Cable for select 1998-2008 vehicles from Audi

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Auxillary Cable Input Car Stereo Kit with 3.5mm Cable for select 1998-2008 vehicles from Audi

• Auxillary Cable Input Car Stereo Kit for select 1998-2008 vehicles from Audi
• Easy connection between the car stereo and MP3/smartphone/iPod
• Includes a 5 ft. 3.5mm audio phone jack cable

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$96.99

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• Auxillary Cable Input Car Stereo Kit for select 1998-2008 vehicles from Audi
• Easy connection between the car stereo and MP3/smartphone/iPod
• Includes a 5 ft. 3.5mm audio phone jack cable

Race Sport Accessories H7TLED

H7 Terminator Series Fan-less Shallow-mount LED Conversion Headlight Kit with Pinpoint Projection Optical Aims

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H7 Terminator Series Fan-less Shallow-mount LED Conversion Headlight Kit with Pinpoint Projection Optical Aims

• H7 Fan-less LED Conversion Headlight Kit
• IP67 waterproof rating
• 2000 lux / 2250 lumens per bulb
• See 2-3 times further than stock lighting systems
• Low-mounting depth base design

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Was $89.00 Details
$69.00

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• H7 Fan-less LED Conversion Headlight Kit
• IP67 waterproof rating
• 2000 lux / 2250 lumens per bulb
• See 2-3 times further than stock lighting systems
• Low-mounting depth base design

Crux BTS-VW1

Bluetooth Audio Streaming, USB Connectivity & Line Input Interface for Select 1999 - 2008 Volkswagen & Audi Vehicles

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Bluetooth Audio Streaming, USB Connectivity & Line Input Interface for Select 1999 - 2008 Volkswagen & Audi Vehicles

• Adds Bluetooth Music Streaming
• For Select Audi & Volkswagen Vehicles
• Adds an AUX Input
• Navigation App Voice through Factory Speakers
• Dimension: 3.5" L x 2.5" W x 7" H

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• Adds Bluetooth Music Streaming
• For Select Audi & Volkswagen Vehicles
• Adds an AUX Input
• Navigation App Voice through Factory Speakers
• Dimension: 3.5" L x 2.5" W x 7" H

Metra 82-9101

6" to 6 3/4" Speaker Adapter for select 1998-2016 vehicles from Audi

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6" to 6 3/4" Speaker Adapter for select 1998-2016 vehicles from Audi

• Adapters for 6" - 6-3/4" Speakers
• Fits Select 2000-2010 Audi A3 and A4 Vehicles
• Break-Away Tab Design
• Fits Front or Rear Doors

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  • Lower Front Door 6.5" Full-Range
  • Lower Rear Door 6.5" Full-Range
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$27.99

In stock

• Adapters for 6" - 6-3/4" Speakers
• Fits Select 2000-2010 Audi A3 and A4 Vehicles
• Break-Away Tab Design
• Fits Front or Rear Doors

Metra 40-VW10 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

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Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

• Factory Antenna to Aftermarket Radio Adapter
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Factory antenna with flat plug to aftermarket radio
• A capacitor is included to match the impedance

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• Factory Antenna to Aftermarket Radio Adapter
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Factory antenna with flat plug to aftermarket radio
• A capacitor is included to match the impedance

Scosche SAAI651

select 1996-2008 vehicles from Audi Multi 6.5" Speaker Adapter

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select 1996-2008 vehicles from Audi Multi 6.5" Speaker Adapter

• 6.5" Multi Speaker Adapter
• Compatible with select 1996-2008 vehicles from Audi Vehicles

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  • Lower Front Door 6.5" Full-Range
  • Lower Rear Door 6.5" Full-Range
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$10.95

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Only 3 Left!

• 6.5" Multi Speaker Adapter
• Compatible with select 1996-2008 vehicles from Audi Vehicles

Metra 70-1784 Wiring Harness

Install a new car stereo in select 1980-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

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Install a new car stereo in select 1980-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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$12.99

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• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

GROM Audio AUDU3 (GROM-USB3-AUD)

Android and iOS Smartphone Integration for Select 1998-2009 Audi Vehicles

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Android and iOS Smartphone Integration for Select 1998-2009 Audi Vehicles

• Android, Bluetooth, iPhone, iPod Integration Kit
• Compatible With Select 1998-2009 Audi Stereos
• Optional 3.5mm AUX and Bluetooth
• Streaming Audio for Android 4.1 and Above

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$174.99

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Metra 44-PW530 Antenna

Universal Fully Automatic Power Antenna

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Universal Fully Automatic Power Antenna

• Replacement Power Antenna for Select Vehicles
• Replaceable Mast
• Fully Automatic

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• Replacement Power Antenna for Select Vehicles
• Replaceable Mast
• Fully Automatic

GROM Audio Audi Smartphone Music Streaming Kit (GROM-USB3-AUD BTD)

Control Your Streaming Music from an Android or iOS Smartphone on Select 1998-2009 Audi Factory Radios

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Control Your Streaming Music from an Android or iOS Smartphone on Select 1998-2009 Audi Factory Radios

• Android, Bluetooth, iPhone, iPod Integration Kit
• Compatible With Select 1998-2009 Audi Stereos
• Optional 3.5mm AUX and Bluetooth
• Streaming Audio for Android 4.1 and Above

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• Android, Bluetooth, iPhone, iPod Integration Kit
• Compatible With Select 1998-2009 Audi Stereos
• Optional 3.5mm AUX and Bluetooth
• Streaming Audio for Android 4.1 and Above

Metra 99-9107B Dash Kit

Install a new Single-DIN or Double-DIN car stereo in select 2002-2009 vehicles from Audi (Matte Black)

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Install a new Single-DIN or Double-DIN car stereo in select 2002-2009 vehicles from Audi (Matte Black)

• Single-DIN or Double-DIN Dash Kit
• Painted scratch-resistant matte black
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

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• Single-DIN or Double-DIN Dash Kit
• Painted scratch-resistant matte black
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

Scosche VWA3RB Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1998-2025 vehicles from Ford, BMW, Chevrolet

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Connect your factory antenna to a new aftermarket radio for select 1998-2025 vehicles from Ford, BMW, Chevrolet

• select 1998-2025 vehicles from Ford, BMW, Chevrolet Vehicles
• Aftermarket Antenna Female (Motorola Plug) to Factory Radio Male (Proprietary Plug)

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• select 1998-2025 vehicles from Ford, BMW, Chevrolet Vehicles
• Aftermarket Antenna Female (Motorola Plug) to Factory Radio Male (Proprietary Plug)

Metra 72-9002

Speaker Harness for select 1996-2025 vehicles from Mercedes-Benz, Audi, Chevrolet

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Speaker Harness for select 1996-2025 vehicles from Mercedes-Benz, Audi, Chevrolet

• Compatible with select 1996-2025 vehicles from Mercedes-Benz, Audi, Chevrolet Vehicles
• For European Vehicles
• Plugs Directly into Vehicles Harness
• Durable Plastic and Metal Materials

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• Compatible with select 1996-2025 vehicles from Mercedes-Benz, Audi, Chevrolet Vehicles
• For European Vehicles
• Plugs Directly into Vehicles Harness
• Durable Plastic and Metal Materials

Scosche VW01B Wiring Harness

Install a new car stereo in select 1975-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

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Install a new car stereo in select 1975-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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$7.99

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• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

Metra 70-1787 Wiring Harness

Install a new car stereo and retain factory amplifier in select 1996-2006 vehicles from Audi, Porsche

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Install a new car stereo and retain factory amplifier in select 1996-2006 vehicles from Audi, Porsche

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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$29.99

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• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

iDataLink Maestro HRN-RR-AU1 Wiring Harness

Install a New Car Stereo in select 2002-2015 vehicles from Audi (Requires ADS-MRR or ADS-MRR2 Module)

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Install a New Car Stereo in select 2002-2015 vehicles from Audi (Requires ADS-MRR or ADS-MRR2 Module)

• Fits select 2002-2015 vehicles from Audi
• Designed for use with iDataLink ADS-MRR or iDataLink ADS-MRR2 module (Sold separately)
• Retains select factory features
• Provides accessory power, navigation and illumination outputs

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• Fits select 2002-2015 vehicles from Audi
• Designed for use with iDataLink ADS-MRR or iDataLink ADS-MRR2 module (Sold separately)
• Retains select factory features
• Provides accessory power, navigation and illumination outputs

Metra 40-VW53 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

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Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

• Aftermarket Radio To Factory Antenna Adapter (Amplified)
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Includes Power Wire For Antenna Booster
• Can Be Used In Place Of 40-VW54

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$15.99

Available

Ships in 10-14 days

• Aftermarket Radio To Factory Antenna Adapter (Amplified)
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Includes Power Wire For Antenna Booster
• Can Be Used In Place Of 40-VW54

Metra 40-VW54 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2017 vehicles from BMW, Audi, Volkswagen

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Connect your factory antenna to a new aftermarket radio for select 1973-2017 vehicles from BMW, Audi, Volkswagen

• Volkswagen Aftermarket Antenna Adapter
• Compatible with select 1973-2017 vehicles from BMW, Audi, Volkswagen Vehicles
• Coax cable powered amplified antenna

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• Volkswagen Aftermarket Antenna Adapter
• Compatible with select 1973-2017 vehicles from BMW, Audi, Volkswagen Vehicles
• Coax cable powered amplified antenna

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    FAQ for your 2003 A4

    Q: Can I upgrade the factory stereo system in my 2003 Audi A4?

    A: Yes you can improve your sound in your A4 by upgrading your speakers and/or adding an amplifier. You may also be able to update the stereo and main display in your 2003 A4 if there is a dash kit and harness solution available.

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