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Car Stereo Installation & Accessories for your 2004 325Ci

Finally getting that car stereo that you have always wanted? In this category you will find everything that you need to install your new stereo, as well as items that you can use enhance the sound from the new head unit. Some of these products include installation dash kits, wiring harnesses, iPod adapters, connectors, noise filters, Bluetooth handsfree kits, and more.

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Metra 40-EU55 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, GMC

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Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, GMC

• Antenna Adapter Cable
• Compatible with select 1998-2024 vehicles from BMW, Chevrolet, GMC Vehicles
• Powered antenna and newer "FACRA" style connector to aftermarket radio

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

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found car based on your search
This product fits your 2004 325Ci
30
Was $27.99 Details
$13.99

In stock

• Antenna Adapter Cable
• Compatible with select 1998-2024 vehicles from BMW, Chevrolet, GMC Vehicles
• Powered antenna and newer "FACRA" style connector to aftermarket radio

Metra 40-EU10 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

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Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

• Antenna to Radio Adapter Cable
• This adapter works with 2000 and up Volkswagen, BMW, and European factory antenna connectors with the mini-style plug
• Factory antenna with mini-style plug to aftermarket radio

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

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found car based on your search
This product fits your 2004 325Ci
30
Was $19.99 Details
$7.99

In stock

• Antenna to Radio Adapter Cable
• This adapter works with 2000 and up Volkswagen, BMW, and European factory antenna connectors with the mini-style plug
• Factory antenna with mini-style plug to aftermarket radio

Metra 40-VW10 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2019 vehicles from Mercedes-Benz, Audi, Volkswagen

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Connect your factory antenna to a new aftermarket radio for select 1973-2019 vehicles from Mercedes-Benz, Audi, Volkswagen

• Factory Antenna to Aftermarket Radio Adapter
• Compatible with select 1973-2019 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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Fast 3-day shipping to VA. Get it Wed, Apr. 3

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found car based on your search
This product fits your 2004 325Ci
14
Was $19.99 Details
$7.99

In stock

• Factory Antenna to Aftermarket Radio Adapter
• Compatible with select 1973-2019 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Factory antenna with flat plug to aftermarket radio
• A capacitor is included to match the impedance

Crux SWR-A

Steering Wheel Control Retention Interface for Analog SWC

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Steering Wheel Control Retention Interface for Analog SWC

• Retains Steering Wheel Controls
• Retains VR Command
• Works with Sony Radio with CarPlay Function
• Dimension: 3.5" L x 2.5" W x 7" H

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

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found car based on your search
This product fits your 2004 325Ci
Was $69.95 Details
$43.95

In stock

Only 1 Left!

• Retains Steering Wheel Controls
• Retains VR Command
• Works with Sony Radio with CarPlay Function
• Dimension: 3.5" L x 2.5" W x 7" H

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Item added to your cart.

Price: $43.95

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Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Scosche VWA3B Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

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Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

• select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz Vehicles
• Aftermarket Antenna Male (Motorola Plug) to Factory Radio Female (Proprietary Plug)

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

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found car based on your search
This product fits your 2004 325Ci
52
Was $9.44 Details
$8.95

In stock

Only 3 Left!

• select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz Vehicles
• Aftermarket Antenna Male (Motorola Plug) to Factory Radio Female (Proprietary Plug)

Scosche VWA2B 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

• VW Amplified Antenna Adapter
• select 1973-2017 vehicles from BMW, Audi, Volkswagen Vehicles

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

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22
Was $14.95 Details
$12.99

In stock

Only 3 Left!

• VW Amplified Antenna Adapter
• select 1973-2017 vehicles from BMW, Audi, Volkswagen Vehicles

Scosche VW03B Wiring Harness

Install a new car stereo in select 2000-2009 vehicles from BMW, MINI, Pontiac

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Install a new car stereo in select 2000-2009 vehicles from BMW, MINI, Pontiac

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

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

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23
Was $10.95 Details
$7.95

In stock

Only 3 Left!

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

Metra 40-VW30 Antenna Adapter

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

40-VW30 big
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Connect your factory antenna to a new aftermarket radio for select 1973-2017 vehicles from BMW, Volkswagen, Audi

• Antenna Adapter Kit
• Compatible with select 1973-2017 vehicles from BMW, Volkswagen, Audi Vehicles
• For adding source units with FM modulator

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2004 325Ci
2
Was $29.99 Details
$19.99

In stock

Only 3 Left!

• Antenna Adapter Kit
• Compatible with select 1973-2017 vehicles from BMW, Volkswagen, Audi Vehicles
• For adding source units with FM modulator

Scosche VWA3RB Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

VWA3RB big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

• select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz Vehicles
• Aftermarket Antenna Female (Motorola Plug) to Factory Radio Male (Proprietary Plug)

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2004 325Ci
1
Was $19.99 Details
$9.95

In stock

• select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz Vehicles
• Aftermarket Antenna Female (Motorola Plug) to Factory Radio Male (Proprietary Plug)

Scosche VWARB Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1975-2015 vehicles from Mercedes-Benz, Volkswagen, BMW

VWARB big
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Connect your factory antenna to a new aftermarket radio for select 1975-2015 vehicles from Mercedes-Benz, Volkswagen, BMW

• Converts standard Motorola female to OEM antenna male
• Use when replacing factory non-amplified antenna
• VW Reverse Antenna Converter
• Aftermarket Antenna Female (Standard Motorola Plug) to Factory Radio Male (OEM Original Proprietary Plug)
• select 1975-2015 vehicles from Mercedes-Benz, Volkswagen, BMW Vehicles

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Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2004 325Ci
$8.95

In stock

Only 1 Left!

• Converts standard Motorola female to OEM antenna male
• Use when replacing factory non-amplified antenna
• VW Reverse Antenna Converter
• Aftermarket Antenna Female (Standard Motorola Plug) to Factory Radio Male (OEM Original Proprietary Plug)
• select 1975-2015 vehicles from Mercedes-Benz, Volkswagen, BMW Vehicles

Metra 40-EU20 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, Ford

40-EU20 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1998-2024 vehicles from BMW, Chevrolet, Ford

• Radio to Antenna Adapter
• select 1998-2024 vehicles from BMW, Chevrolet, Ford Vehicles
• Factory radio with mini-style plug to universal antenna

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2004 325Ci
Was $29.99 Details
$8.99

In stock

Only 3 Left!

• Radio to Antenna Adapter
• select 1998-2024 vehicles from BMW, Chevrolet, Ford Vehicles
• Factory radio with mini-style plug to universal antenna

Metra 40-VW53 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2019 vehicles from Mercedes-Benz, Audi, Volkswagen

40-VW53 big
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Connect your factory antenna to a new aftermarket radio for select 1973-2019 vehicles from Mercedes-Benz, Audi, Volkswagen

• Aftermarket Radio To Factory Antenna Adapter (Amplified)
• Compatible with select 1973-2019 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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Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2004 325Ci
3
$12.99

In stock

Only 3 Left!

• Aftermarket Radio To Factory Antenna Adapter (Amplified)
• Compatible with select 1973-2019 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Includes Power Wire For Antenna Booster
• Can Be Used In Place Of 40-VW54

Metra 40-VW20 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1982-2019 vehicles from Mercedes-Benz, Audi, Volkswagen

40-VW20 big
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Connect your factory antenna to a new aftermarket radio for select 1982-2019 vehicles from Mercedes-Benz, Audi, Volkswagen

• Factory Radio to Aftermarket Antenna Adapter
• Compatible with select 1982-2019 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2004 325Ci
Was $29.99 Details
$4.99

In stock

• Factory Radio to Aftermarket Antenna Adapter
• Compatible with select 1982-2019 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles

Metra 40-EU30 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

40-EU30 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz

• Antenna Adapter Kit
• select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz Vehicles
• Antenna adapters for adding CD changer or other sources with FM modulator

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

found car based on your search
This product fits your 2004 325Ci
Was $49.99 Details
$10.99

In stock

• Antenna Adapter Kit
• select 2001-2020 vehicles from BMW, GMC, Mercedes-Benz Vehicles
• Antenna adapters for adding CD changer or other sources with FM modulator

Metra 40-VW54 Antenna Adapter

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

40-VW54 big
Go to item page Right Arrow Icon of Right Arrow

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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Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

1
Was $29.99 Details
$9.99

In stock

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

Metra 95-9312B Dash Kit

Install a new Double-DIN car stereo in select 1999-2006 vehicles from BMW

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Install a new Double-DIN car stereo in select 1999-2006 vehicles from BMW

• Double-DIN Dash Kit
• Accommodates ISO Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture
• Compatible with select 1999-2006 vehicles from BMW Vehicles

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FREE 2-day shipping to VA. Get it Tue, Apr. 2

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3
Was $89.99 Details
$75.99

In stock

Only 2 Left!

• Double-DIN Dash Kit
• Accommodates ISO Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture
• Compatible with select 1999-2006 vehicles from BMW Vehicles

95-9312B small

Item added to your cart.

Price: $75.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
Essential add-ons
Belva BTK105

5 Piece Installer's Removal Tool Kit

$18.99

$11.99

Add to cart

Metra 70-9003 Wiring Harness

Install a new car stereo in select 2000-2009 vehicles from BMW, MINI, Pontiac

70-9003 big
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Install a new car stereo in select 2000-2009 vehicles from BMW, MINI, Pontiac

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

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

4
Was $19.99 Details
$6.99

In stock

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

Metra 99-9300 Dash Kit

Install a new Single-DIN car stereo in select 1997-2006 vehicles from BMW

99-9300 big
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Install a new Single-DIN car stereo in select 1997-2006 vehicles from BMW

• Single-DIN Dash Kit
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

4
Was $29.99 Details
$11.99

In stock

Only 3 Left!

• Single-DIN Dash Kit
• High-Grade ABS plastic construction
• Original factory-like fit and finish
• Includes installation instructions

99-9300 small

Item added to your cart.

Price: $11.99

Essential add-ons
Belva BTK105

5 Piece Installer's Removal Tool Kit

$18.99

$11.99

Add to cart

Scosche BW01B Wiring Harness

Install a new car stereo in select 1990-2006 vehicles from BMW, Land Rover

BW01B big
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Install a new car stereo in select 1990-2006 vehicles from BMW, Land Rover

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

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

36
Was $19.99 Details
$6.95

In stock

Only 3 Left!

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

Metra 70-8590 Wiring Harness

Install a new car stereo in select 1990-2006 vehicles from BMW, Land Rover

70-8590 big
Go to item page Right Arrow Icon of Right Arrow

Install a new car stereo in select 1990-2006 vehicles from BMW, Land Rover

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

shipping truck icon
Fast 3-day shipping to VA. Get it Wed, Apr. 3

empty

3
Was $29.99 Details
$7.99

In stock

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

Items per page: 20

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FAQ Frequently asked questions in Car Stereo Installation & Accessories


Car Stereo Installation & Accessories Frequently Asked Questions (FAQ)
Car Stereo Installation & Accessories encompass various crucial components. First and foremost is the head unit, which serves as the control center for your car's audio system. It provides radio tuning, CD/DVD playback, Bluetooth connectivity, and more. Additionally, you'll need wiring harnesses and adapters to ensure compatibility between the head unit and your vehicle's wiring. These components make installation easier and minimize the risk of damaging your car's electrical system. To enhance sound quality, consider amplifier installation kits. These kits include power and ground cables, connectors, and fuses, allowing you to connect an external amplifier to boost your audio system's performance. Lastly, don't forget about mounting kits and brackets to securely install your head unit and speakers. These components are vital for a seamless and professional-looking installation.
Choosing the right Car Stereo Installation & Accessories begins with understanding your vehicle's make, model, and year. This information helps you select compatible wiring harnesses and mounting kits. Next, consider your audio preferences. If you're looking to upgrade your car's sound system significantly, opt for an amplifier installation kit that matches your amplifier's power requirements. Additionally, check the head unit's compatibility with your smartphone and other devices. Features like Bluetooth connectivity, Apple CarPlay, or Android Auto can greatly enhance your driving experience. Ensure that the accessories you choose align with your car audio goals, whether it's improved sound quality, convenience, or connectivity.
The need for professional installation depends on your experience with car audio systems and wiring. If you're comfortable working with electronics and have installed car audio equipment before, you may be able to handle the installation yourself. However, professional installation is highly recommended, especially if you're new to car audio. Professional installers have the expertise to ensure a secure and proper installation. They can also troubleshoot any issues that may arise during the process. Furthermore, professional installation often includes a warranty, providing peace of mind that the work is done correctly.
Car Stereo Installation & Accessories offer several ways to enhance your car's audio quality. Start with upgrading your head unit, which can provide better sound processing and connectivity options. Consider adding an amplifier and a subwoofer to improve bass response and overall audio output. Ensure that you use high-quality speaker wiring and cables to minimize signal loss. Additionally, sound deadening materials can reduce road and engine noise, further enhancing audio clarity. Professional tuning and calibration of your audio system can also make a significant difference. It's important to choose accessories that match your specific audio goals, whether it's achieving balanced sound, deep bass, or advanced connectivity options.
Safety is paramount during Car Stereo Installation & Accessories installation. Start by disconnecting the car's battery to avoid electrical accidents. When handling wiring and electrical connections, follow proper insulation techniques to prevent short circuits or fires. Secure all cables and wires away from moving parts like steering columns and pedals. During the installation of amplifiers and subwoofers, ensure that they are securely mounted to prevent movement while driving. Avoid drilling into gas tanks, brake lines, or other sensitive areas when installing components. It's also a good practice to have a fire extinguisher and a first aid kit on hand in case of emergencies.

All About

Car Stereo Installation & Accessories
Adding extra components and upgrading car stereos always requires more accessories than you expect at first. Between making the head fit the dash, preserving the sound quality of your new hardware with the right cables and connectors, or getting all your components optimized and synchronized, car stereo accessories play a vital role in getting you the car audio system you want. We have a range of car stereo adapters to easily integrate new media devices. They offer you a number of ways to connect an iPod to virtually any car stereo, either docked and charging, or just through the aux jack. They also let you run any other auxiliary source into the main receiver, and connect a CD changer from the back. Our car stereo cables offer the best integrity of sound quality to connect your tuner, receiver, amps, and speakers and get the most power from your system. But most importantly, our main car stereo accessories offer the tools you need to have your car stereo upgraded, or even help you establish the capability to upgrade your stereo yourself. We have stereo removal kits, remotes, universal harnesses and car stereo adapters, optimizing and tuning tools, dash kits, and a slew of adapters, connectors, wire terminals, and wiring harnesses. Our selection offers almost everything you need for a do-it-yourself upgrade. That means you can turn your audio technology understanding into savings on labor and more intimate knowledge about the finer details of your system. Lastly, we have a range of car stereo installation accessories to help you put the finishing touches on your dash and car stereo setup. These include noise filters, FM modulators, and steering wheel control adapters and interfaces. Use these to cut ground and amp noise, create and pick up iPod signals through your FM stereo, and put stereo controls safely at your fingertips as you drive. With these final components, your opportunities to make one of the most perfect car stereos are almost limitless.
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2004 BMW 325Ci

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  • Owner’s manual
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  • Vehicle produced after 2005: Inside driver’s side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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