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2003 Audi A6

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Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Overview Upgrade your Stereo Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Universal-Fit Audio for 2003 Audi A6

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

Better sound with your factory radio

Better sound with a factory radio

Love your factory look or can't replace the stereo? We got you covered.

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The InstallBay AK4ANL

4 Gauge Complete Amplifier Installation Kit with RCA Interconnect Cables & ANL Fuse Holder

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The InstallBay AK4ANL

4 Gauge Complete Amplifier Installation Kit with RCA Interconnect Cables & ANL Fuse Holder

• Complete 4 Gauge Amplifier Installation Kit with RCA Interconnect Cables
• Perfect for 1800 Watts Amplifier Setup
• 17ft. Blue Power Cable
• 3ft. Black Ground Cable
• 17ft. Blue RCA Cable

2+ offers available
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List price $68.99
-10% $61.99

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Available Offers (2) for The InstallBay AK4ANL
15% off an NVX XCAP10H w/ Select Amp Kits Add a qualifying amplifier to your cart and save 15% on the NVX XCAP10H Capacitor! No code needed — discount applies automatically at checkout.
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15% off an NVX XCAP1F w/ Select Amp Kits Add a qualifying amplifier to your cart and save 15% on the NVX XCAP1F Capacitor! No code needed — discount applies automatically at checkout.
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Install Bay IBR93

In-Dash Voltage and Amperage Meter w/ LED Display

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Install Bay IBR93

In-Dash Voltage and Amperage Meter w/ LED Display

• 12V Voltage Meter
• Monitors Amperage As Well
• Digital Display
• Mounts in Dash

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List price $51.99
-12% $45.99

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• 12V Voltage Meter
• Monitors Amperage As Well
• Digital Display
• Mounts in Dash

NVX - Worth the Envy - Direct to Consumer Car Audio

Install Bay F6N050BK

1/2" Self-Wrapping Split Braid Sleeving, Black - 75FT

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Install Bay F6N050BK

1/2" Self-Wrapping Split Braid Sleeving, Black - 75FT

• 1/2" split-braid sleeving
• Protects wires, cables, hoses and more
• Protects against salt water, solvents, automotive chemicals and more
• More flexible than plastic
• Resists cuts and other abrasions

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List price $152.99
-10% $136.99

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• 1/2" split-braid sleeving
• Protects wires, cables, hoses and more
• Protects against salt water, solvents, automotive chemicals and more
• More flexible than plastic
• Resists cuts and other abrasions

Install Bay 3MBNFD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Female Quick Disconnect

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Install Bay 3MBNFD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Female Quick Disconnect

• Female Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

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• Female Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

Install Bay ATMDT-1

Add-a-Fuse Dual Mini ATM Fuse Tap Kit - 1 PC

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Install Bay ATMDT-1

Add-a-Fuse Dual Mini ATM Fuse Tap Kit - 1 PC

• Dual Mini ATM Fuse Tap Kit
• Add a Fuse

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-15% $10.99

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• Dual Mini ATM Fuse Tap Kit
• Add a Fuse

Install Bay 3MBNMD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Male Quick Disconnect

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Install Bay 3MBNMD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Male Quick Disconnect

• Male Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

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List price $27.99
-11% $24.99

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• Male Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

Install Bay IBR91

In-Dash USB and 3.5mm Aux input Knockout Panel

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Install Bay IBR91

In-Dash USB and 3.5mm Aux input Knockout Panel

• In-Dash Knockout Panel
• Adds 3.5mm Aux and USB Ports
• Installs in Dash

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List price $47.99
-58% $19.99

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• In-Dash Knockout Panel
• Adds 3.5mm Aux and USB Ports
• Installs in Dash

Install Bay 3MHST38

3M Heat Shrink 3/8" Diameter Tubing Black

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Install Bay 3MHST38

3M Heat Shrink 3/8" Diameter Tubing Black

• 3/8 inch heat shrink tubing
• Made with polyoefin (black)
• Length: 4 feet

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List price $9.99
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• 3/8 inch heat shrink tubing
• Made with polyoefin (black)
• Length: 4 feet

The Install Bay IB200

200 Amp Battery Isolator and Relay

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The Install Bay IB200

200 Amp Battery Isolator and Relay

• Battery Isolator and Relay
• 200 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

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Universal Icon Universal – fits most vehicles.

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List price $126.99
-10% $113.99

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• Battery Isolator and Relay
• 200 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

Install Bay 3MHS316

3M Heat Shrink 3/16" Diameter Tubing 10 Pack

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Install Bay 3MHS316

3M Heat Shrink 3/16" Diameter Tubing 10 Pack

• 3/16 inch
• Refill pack of heat shrink
• Pack of 10 < /br>

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$7.99

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Ships in 10-14 days

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• 3/16 inch
• Refill pack of heat shrink
• Pack of 10 < /br>

Install Bay 3MHST14

3M Heat Shrink 1/4" Diameter Tubing Black

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Install Bay 3MHST14

3M Heat Shrink 1/4" Diameter Tubing Black

• 1/4 inch heat shrink tubing
• Made with Polyoefin (black)
• Length: 4 feet

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List price $8.99
-11% $7.99

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• 1/4 inch heat shrink tubing
• Made with Polyoefin (black)
• Length: 4 feet

Install Bay 3MYVBC

3M Yellow 12/10 Gauge Vinyl Butt Connectors

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Install Bay 3MYVBC

3M Yellow 12/10 Gauge Vinyl Butt Connectors

• Butt Connectors
• 12/10 Gauge
• Color: Yellow
• Vinyl Insulated
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires

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List price $37.99
-11% $33.99

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• Butt Connectors
• 12/10 Gauge
• Color: Yellow
• Vinyl Insulated
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires

Install Bay IB5KR

5000 Ohm Load Resistors (Pack of 100)

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Install Bay IB5KR

5000 Ohm Load Resistors (Pack of 100)

• 5000 ohms / 0.05 watts / 5 percent load resistors
• Pack of 100

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List price $4.99
-20% $3.99

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• 5000 ohms / 0.05 watts / 5 percent load resistors
• Pack of 100

Install Bay 3MHST316

3M Heat Shrink 3/16" Diameter Tubing Black

3MHST316 big
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Install Bay 3MHST316

3M Heat Shrink 3/16" Diameter Tubing Black

• 3/16 inch heat shrink tubing
• Made with polyoefin (black)
• Length: 4 feet

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List price $6.99
-14% $5.99

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Ships in 10-14 days

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• 3/16 inch heat shrink tubing
• Made with polyoefin (black)
• Length: 4 feet

Install Bay FMX-40

40 Amp USA Cooper Bussman FMX Fuse

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Install Bay FMX-40

40 Amp USA Cooper Bussman FMX Fuse

• USA Cooper Bussman FMX Fuse
• Universal application
• Fuse Size: 40 amp
• See-Through Windows
• High-Temperature Plastic Casings
• Circuit Protection
• High Conductivity

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List price $9.99
-10% $8.99
Add to Cart

• USA Cooper Bussman FMX Fuse
• Universal application
• Fuse Size: 40 amp
• See-Through Windows
• High-Temperature Plastic Casings
• Circuit Protection
• High Conductivity

Install Bay 3MBNBG

3M Blue 16/14 Gauge Insul-Grip Seamless Butt Connectors

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Install Bay 3MBNBG

3M Blue 16/14 Gauge Insul-Grip Seamless Butt Connectors

• 100 Pack of Seamless Butt Connectors
• 16/14 Gauge
• Color: Blue
• Makes crimping wires fast and easy
• Offers a solid connection of wires

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$34.99

In stock

Only 1 Left!

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• 100 Pack of Seamless Butt Connectors
• 16/14 Gauge
• Color: Blue
• Makes crimping wires fast and easy
• Offers a solid connection of wires

Install Bay IBR65

Bluetooth Audio Receiver Flush Mount

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Install Bay IBR65

Bluetooth Audio Receiver Flush Mount

• Bluetooth Audio Receiver Mount
• 3.5mm auxiliary input
• Independent volume and track controls

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List price $164.99
-10% $147.99

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• Bluetooth Audio Receiver Mount
• 3.5mm auxiliary input
• Independent volume and track controls

Install Bay Dual ATC Fuse Tap Kit (ATCDT-1)

Add-a-Circuit Dual ATC Fuse Tap Kit

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Install Bay Dual ATC Fuse Tap Kit (ATCDT-1)

Add-a-Circuit Dual ATC Fuse Tap Kit

• ATC Dual Add A Fuse
• Add-a-Circuit

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-14% $11.99

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• ATC Dual Add A Fuse
• Add-a-Circuit

Install Bay IBR69

100W 2-Channel Mini Line Output Converter

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Install Bay IBR69

100W 2-Channel Mini Line Output Converter

• 2-Channel mini line output converter
• Auto remote amp turn-on
• 6:1 step down with adjustable output
• Handles up to 50 watts of input power per channel

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• 2-Channel mini line output converter
• Auto remote amp turn-on
• 6:1 step down with adjustable output
• Handles up to 50 watts of input power per channel

Install Bay IBR70

Universal Flush Mount Wired Bass Remote Controller with RCA Connectors

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Install Bay IBR70

Universal Flush Mount Wired Bass Remote Controller with RCA Connectors

• Universal Wired Bass Remote Controller
• Flush or surface-mount installation
• Color: Black

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• Universal Wired Bass Remote Controller
• Flush or surface-mount installation
• Color: Black

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    FAQ for Universal-Fit Audio & Electronics in 2003 A6

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 Audi A6?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your A6.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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