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Car Stereo Installation & Accessories for your 2018 Impreza

Installing an aftermarket head unit involves more than just choosing a screen; it's about building a bridge between new technology and your vehicle's factory architecture. Without the right installation accessories, a high-end receiver can't provide the seamless look or the integrated functionality your car was designed with. From dash kits that match your interior texture to complex digital interfaces that talk to your vehicle's computer, these components are what make a professional-grade installation possible.

Whether you're looking to retain your steering wheel controls, adapt a proprietary antenna plug, or ensure your new Double-DIN screen sits flush in the dash, we carry a comprehensive selection of gear from industry leaders like Metra, Scosche, PAC, and iDatalink.

Use our FitFinder to find the exact parts required for your specific year, make, and model. It's the most reliable way to ensure your DIY project results in a factory-finished look.

It's a no-brainer. Get your installation gear here.

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Metra 70-1761 Wiring Harness

Install a new car stereo in select 1984-2022 vehicles from Toyota, Subaru, Scion

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Install a new car stereo in select 1984-2022 vehicles from Toyota, Subaru, Scion

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

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97
List price $6.99
-14% $5.99

In stock

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

Axxess AXABH-LX1

Amplifier Bypass Harness for select 2012-2025 vehicles from Subaru, Lexus, Toyota

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Amplifier Bypass Harness for select 2012-2025 vehicles from Subaru, Lexus, Toyota

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

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1
List price $33.99
-12% $29.99

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Only 2 Left!

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

iDataLink Maestro ACC-USB2 USB Adapter

Connect Converted Factory USB Port to Aftermarket Car Stereo in select 2012-2025 vehicles from Toyota, Subaru, Honda

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Connect Converted Factory USB Port to Aftermarket Car Stereo in select 2012-2025 vehicles from Toyota, Subaru, Honda

• USB adapter for select 2012-2025 vehicles from Toyota, Subaru, Honda
• Retains vehicle's factory USB port
• Converts factory USB port cable to full size male USB
• Male USB can be plugged into aftermarket radio

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List price $21.99
-23% $16.99

In stock

Only 2 Left!

• USB adapter for select 2012-2025 vehicles from Toyota, Subaru, Honda
• Retains vehicle's factory USB port
• Converts factory USB port cable to full size male USB
• Male USB can be plugged into aftermarket radio

Metra 40-LX11

Connect your factory antenna to a new aftermarket radio for select 2006-2025 vehicles from Toyota, Subaru, Lexus

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Connect your factory antenna to a new aftermarket radio for select 2006-2025 vehicles from Toyota, Subaru, Lexus

• Antenna adapter for select 2006-2025 vehicles from Toyota, Subaru, Lexus
• Use for replacing vehicle radio
• Male Motorola connector on one end
• Female Molex connector on other end

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35
List price $17.99
-17% $14.99

In stock

• Antenna adapter for select 2006-2025 vehicles from Toyota, Subaru, Lexus
• Use for replacing vehicle radio
• Male Motorola connector on one end
• Female Molex connector on other end

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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1
List price $90.30
-36% $58.05

In stock

• 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

Metra 40-SB10

Antenna Adapter for select 2005-2025 vehicles from Subaru

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Antenna Adapter for select 2005-2025 vehicles from Subaru

• Antenna adapter
• For select 2005-2025 vehicles from Subaru
• Use for replacing vehicle radio
• Male Motorola connector on one end
• Female Subaru-style antenna connector on the other end

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7
List price $14.99
-27% $10.99

In stock

• Antenna adapter
• For select 2005-2025 vehicles from Subaru
• Use for replacing vehicle radio
• Male Motorola connector on one end
• Female Subaru-style antenna connector on the other end

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

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29
List price $11.95
-33% $7.99

In stock

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

PAC USB-SB1

OEM USB Port Retention Cable for Select Subaru Vehicles

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OEM USB Port Retention Cable for Select Subaru Vehicles

• OEM USB Port
• Plug and Play
• Retains the Factory USB Port when Installing New Radio
• For Select Subaru Vehicles

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List price $16.00
-25% $11.99

Available

Ships in 10-14 days

• OEM USB Port
• Plug and Play
• Retains the Factory USB Port when Installing New Radio
• For Select Subaru Vehicles

iDataLink ADS-MIC1

Factory Microphone Retention Interface Module for select 2010-2024 vehicles from Ford, Subaru, Toyota (Requires ADS-MSR, MRR, or MR2 Module)

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Factory Microphone Retention Interface Module for select 2010-2024 vehicles from Ford, Subaru, Toyota (Requires ADS-MSR, MRR, or MR2 Module)

• Factory microphone retention interface module
• Retains the factory microphone when adding an aftermarket stereo
• Compatible with select 2010-2024 vehicles from Ford, Subaru, Toyota

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1
List price $99.99
-20% $79.99

In stock

• Factory microphone retention interface module
• Retains the factory microphone when adding an aftermarket stereo
• Compatible with select 2010-2024 vehicles from Ford, Subaru, Toyota

Metra 40-NI11 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1998-2025 vehicles from Subaru, Nissan

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Connect your factory antenna to a new aftermarket radio for select 1998-2025 vehicles from Subaru, Nissan

• Factory Antenna Adapter to Aftermarket Radio Adapter
• select 1998-2025 vehicles from Subaru, Nissan Vehicles
• Nissan diversity factory antenna with 2-pin plug to aftermarket radio
• Disables diversity functions

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List price $13.99
-7% $12.99

In stock

Only 2 Left!

• Factory Antenna Adapter to Aftermarket Radio Adapter
• select 1998-2025 vehicles from Subaru, Nissan Vehicles
• Nissan diversity factory antenna with 2-pin plug to aftermarket radio
• Disables diversity functions

Metra 95-8908HG

Double DIN Stereo Dash Kit for select 2017-2023 Impreza and Crosstrek

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Double DIN Stereo Dash Kit for select 2017-2023 Impreza and Crosstrek

• Double DIN Install Dash Kit
• Compatible with select 2017-2023 Impreza and Crosstrek
• Accommodates ISO Double DIN mount
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

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List price $51.99
-12% $45.99

In stock

Only 3 Left!

• Double DIN Install Dash Kit
• Compatible with select 2017-2023 Impreza and Crosstrek
• Accommodates ISO Double DIN mount
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

Crux SWRSU-38D

Install a New Car Stereo and Retain Harman Kardon Amplifier, Steering Wheel Controls and Other Factory Features in select 2015-2022 vehicles from Subaru

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Install a New Car Stereo and Retain Harman Kardon Amplifier, Steering Wheel Controls and Other Factory Features in select 2015-2022 vehicles from Subaru

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

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found car based on your search
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1
List price $195.30
-36% $125.55

In stock

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

American International SBK931GB

Single DIN or Double DIN Stereo Dash Kit for select 2017-2023 vehicles from Subaru (Gloss Black)

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Single DIN or Double DIN Stereo Dash Kit for select 2017-2023 vehicles from Subaru (Gloss Black)

• Single & Double DIN Install Dash Kit
• Compatible with select 2017-2023 vehicles from Subaru
• Accommodates ISO Single & Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture

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Fits your Impreza
List price $79.00
-51% $38.99

In stock

• Single & Double DIN Install Dash Kit
• Compatible with select 2017-2023 vehicles from Subaru
• Accommodates ISO Single & Double DIN Mount
• Painted to Match Factory Dash Color
• High-Grade ABS Plastic Construction
• Factory Style Texture

Crux SWRSU-38C

Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2015-2020 vehicles from Subaru

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Install a New Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2015-2020 vehicles from Subaru

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

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List price $168.00
-36% $108.00

In stock

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

iDataLink Maestro HRN-HRR-SU3 Wiring Harness

Install New Car Stereo in select 2017-2024 vehicles from Subaru (Requires ADS-MRR2 Module)

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Install New Car Stereo in select 2017-2024 vehicles from Subaru (Requires ADS-MRR2 Module)

• Fits select 2017-2024 vehicles from Subaru
• Designed for use with iDataLink ADS-MRR2 module (Sold separately)
• Retains select factory features
• Provides navigation and illumination outputs

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List price $83.99
-17% $69.99

In stock

Only 1 Left!

• Fits select 2017-2024 vehicles from Subaru
• Designed for use with iDataLink ADS-MRR2 module (Sold separately)
• Retains select factory features
• Provides navigation and illumination outputs

Metra 99-8908HG

Single DIN Stereo Dash Kit for 2017-2023 Subaru Impreza, Crosstrek

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Single DIN Stereo Dash Kit for 2017-2023 Subaru Impreza, Crosstrek

• Single DIN Install Dash Kit
• Compatible with 2017-2023 Subaru Impreza, Crosstrek
• Accommodates ISO Single DIN mount
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

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Fits your Impreza
List price $38.98
-18% $31.99

Available

Ships in 10-14 days

• Single DIN Install Dash Kit
• Compatible with 2017-2023 Subaru Impreza, Crosstrek
• Accommodates ISO Single DIN mount
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

Metra 40-SB20 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2005-2025 vehicles from Subaru

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Connect your factory antenna to a new aftermarket radio for select 2005-2025 vehicles from Subaru

• Factory Radio to Aftermarket Antenna Adapter
• select 2005-2025 vehicles from Subaru Vehicles

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2
List price $18.99
-47% $9.99

Available

Ships in 10-14 days

• Factory Radio to Aftermarket Antenna Adapter
• select 2005-2025 vehicles from Subaru Vehicles

Scosche SUUSB01B

USB Adapter to Retain Factory USB Port for Select 2011-2013 Subaru Vehicles

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USB Adapter to Retain Factory USB Port for Select 2011-2013 Subaru Vehicles

• USB Adapter for Select 2011-2013 Subaru Vehicles
• Plug and Play Installation
• Retains Factory USB for Use with Aftermarket Stereos

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$15.95

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• USB Adapter for Select 2011-2013 Subaru Vehicles
• Plug and Play Installation
• Retains Factory USB for Use with Aftermarket Stereos

PAC USBDMA3

3 ft USB Extension Cable with Dash Mounting Brackets

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3 ft USB Extension Cable with Dash Mounting Brackets

• 3 ft / 36" USB extension cable
• Connects to the rear-panel USB port
• Flush-mountable or dash-mountable design

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2
List price $49.00
-55% $21.99

In stock

• 3 ft / 36" USB extension cable
• Connects to the rear-panel USB port
• Flush-mountable or dash-mountable design

SiriusXM SXV300v1

Add Satellite Radio to Any SiriusXM-Ready Car Stereo

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Add Satellite Radio to Any SiriusXM-Ready Car Stereo

• Includes Hideaway Tuner and Magnetic Antenna
• Pause, Rewind, and Replay Up To 60 Minutes of Live Radio
• Alert Notification When Favorite Song, Team or Artist is Playing

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153
List price $89.99
-22% $69.99

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    FAQ Frequently asked questions in Car Stereo Installation & Accessories


    In most modern vehicles, the factory radio is part of a larger, integrated dash panel rather than a standardized rectangular box. A vehicle-specific dash kit provides the necessary brackets and trim pieces to adapt the universal ISO-mount of an aftermarket stereo to the unique shape and mounting points of your dashboard.

    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.

    Not if you use a Steering Wheel Control (SWC) interface. These modules translate the signals from your factory buttons into a language your new stereo understands. Many modern integration harnesses, like the iDatalink Maestro, include this functionality along with the ability to display engine data and tire pressure on your new screen.
    We strongly recommend using a wiring harness. Cutting factory wires is permanent, increases the risk of short circuits, and can void your vehicle's electrical warranty. A harness allows you to do all your soldering or crimping on the bench, then simply plug the new assembly into the factory connector without damaging the car's original wiring.

    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

    Navigating the hardware required for a radio swap can be confusing. To get the job done right the first time, it's helpful to understand the specific role each accessory plays in the signal chain and the physical assembly.

    Dash Kits: The Cosmetic Foundation

    The dash kit is what ensures your new stereo doesn't look like an afterthought. These kits are engineered to match the exact color, texture, and contour of your factory dash.

    • Single-DIN Kits: Feature a 2-inch tall opening, often including a storage pocket to fill the extra space.
    • Double-DIN Kits: Feature a 4-inch tall opening designed for large touchscreens and multimedia receivers.
    • Multi-Kits: Versatile designs that can be configured for either size depending on your hardware choice.

    Wiring Harnesses and Data Interfaces

    The wiring harness is the electrical nervous system of your install.

    • Standard Harnesses: Provide basic power, ground, and speaker connections for older vehicles.
    • Data Interfaces: Required for modern vehicles with CAN-bus systems. These modules "talk" to the car’s computer to provide a 12V switched power source (which many new cars lack at the radio) and retain safety features like door chimes, OnStar, or factory amplifiers.

    Steering Wheel and Camera Retention

    Convenience and safety shouldn't be sacrificed for better sound. Dedicated interfaces allow you to keep your hands on the wheel and your eyes on the screen when reversing. If your vehicle has a factory backup camera, a camera retention adapter allows you to feed that video signal directly into your new touchscreen's RCA input.

    Professional Installation Tools

    Using the wrong tools can lead to cracked plastic or scratched leather. A set of nylon trim removal tools is essential for prying off dash panels without leaving permanent pry marks. Additionally, we recommend high-quality crimp connectors or heat-shrink tubing to ensure your electrical connections remain stable through years of vehicle vibration.

    The Sonic Electronix Advantage

    We take the guesswork out of the DIY process. When you use our vehicle selector, we don't just show you parts that "might" work; we curate a list of accessories verified to fit your specific cabin. As an Authorized Online Retailer for reputable brands, every interface and kit we sell is backed by full technical support to help you through the trickiest parts of your installation.

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    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    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.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
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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.