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2003 BMW M3

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Get all the stereo installation accessories for your 2003 BMW M3 so you can install your new stereo like a pro.

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

Stereo Installation Accessories for 2003 BMW M3

If you are looking to buy a stereo, then you've come to the right place. We guarantee fitment and we offer free/discounted install accessories on nearly all our stereos for nearly all vehicles! Look at each product tile in the category listing or visit the car stereo product pages for more details.

Stereo Install Dash Kit

Stereo Install Dash Kit

Dash kits let you install and mount an aftermarket stereo receiver in your BMW M3.

Wiring Harness Interface to Install New Car Stereo

Wiring Harness Radio Interface to Install a New Stereo

Install a new stereo receiver in your 2003 M3 with a wiring harness radio replacement interface.

Antenna Adapters to Install a New Stereo

Antenna Adapters to Install a New Stereo

Your vehicle requires an radio antenna adapter to retain AM/FM signal with your new stereo.

Retain your Factory OEM USB Port

Retain your Factory OEM USB Port

Lets you use your BMW M3 factory OEM USB port when installing an aftermarket stereo.

Aftermarket car stereo installation

All Stereo Installation Accessories

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Metra 40-UV44 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for

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Metra 40-UV44 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for

• Universal antenna adapter
• Vehicles
• Female to two male cable

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Universal – fits most vehicles.
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List price $16.99
-53% $7.99

In stock

Only 3 Left!

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• Universal antenna adapter
• Vehicles
• Female to two male cable

Metra 40-UV42 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for

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Metra 40-UV42 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for

• Universal antenna adapter
• Vehicles
• Male to male cable

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Universal Icon
Universal – fits most vehicles.
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2
List price $14.99
-13% $12.99

In stock

Only 1 Left!

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• Universal antenna adapter
• Vehicles
• Male to male cable

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Metra 40-UV41 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for

40-UV41 big
Go to item page Right Arrow Icon of Right Arrow

Metra 40-UV41 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for

• Universal Antenna Adapter
• Vehicles
• Female to female cable

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Universal Icon
Universal – fits most vehicles.
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6
List price $14.99
-13% $12.99

In stock

Only 2 Left!

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• Universal Antenna Adapter
• Vehicles
• Female to female cable

PAC XC024

24" Antenna Extension Cable

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PAC XC024

24" Antenna Extension Cable

• 24" antenna extension cable

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Universal – fits most vehicles.
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List price $24.00
-79% $5.00

Available

Ships in 10-14 days

Add to Cart

• 24" antenna extension cable

Metra 40-VW18 Antenna Adapter

Connect Aftermarket Antenna to Factory Stereo with Flat Connector

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Metra 40-VW18 Antenna Adapter

Connect Aftermarket Antenna to Factory Stereo with Flat Connector

• Universal Antenna Adapter
• Adapts vehicle's factory stereo to use with an aftermarket antenna
• Easy installation, no major modification required

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Universal Icon
Universal – fits most vehicles.
Shop similar products or Update vehicle
1
List price $24.99
-36% $15.99

Available

Ships in 10-14 days

Add to Cart

• Universal Antenna Adapter
• Adapts vehicle's factory stereo to use with an aftermarket antenna
• Easy installation, no major modification required

PAC XC036

36" Antenna Extension Cable

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PAC XC036

36" Antenna Extension Cable

• 36" antenna extension cable

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Universal Icon
Universal – fits most vehicles.
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List price $24.00
-75% $6.00

Available

Ships in 10-14 days

Add to Cart

• 36" antenna extension cable

NVX - Worth the Envy - Direct to Consumer Car Audio
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    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
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    FAQ for Aftermarket Stereo Installation Accessories in 2003 M3

    Q: Can I upgrade or change the Aftermarket Stereo Installation Accessories in 2003 BMW M3?

    A: Yes this page includes all the best Aftermarket Stereo Installation Accessories that work in your M3.

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

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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