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2018 Kia Optima

Easily improve your factory OEM stereo's sound system

Better sound with a factory radio for 2018 Kia Optima

Some factory stereos do not make it easy to be replaced, but you can still add an amp or sub via an integration harness to improve your sound. Additionally, we have custom speaker solutions to make upgrading your sound easy! Lastly, we also have add-ons to upgrade your factory display to get integrate features from a smartphone (via Apple CarPlay or Android Auto) or a backup camera.

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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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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

PAC HWH1140

Install a New Car Stereo in select 2010-2018 vehicles from Hyundai, Kia

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Install a New Car Stereo in select 2010-2018 vehicles from Hyundai, Kia

• Wiring harness to install a new stereo
• Compatible with select 2010-2018 vehicles from Hyundai, Kia
• Plugs into the factory harness

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List price $24.00
-54% $11.00

In stock

• Wiring harness to install a new stereo
• Compatible with select 2010-2018 vehicles from Hyundai, Kia
• Plugs into the factory harness

Axxess AXSP-HK Wiring Interface

Install a New Car Stereo and Retain Factory Amplifier in select 2012-2025 vehicles from Hyundai, Kia

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Install a New Car Stereo and Retain Factory Amplifier in select 2012-2025 vehicles from Hyundai, Kia

• Amplifier retention interface for select 2012-2025 vehicles from Hyundai, Kia
• Designed for amplified systems only
• Must be used with AXDIS-HK1 or AXDIS-HK2 (sold separately)

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List price $128.99
-10% $115.99

In stock

Only 1 Left!

• Amplifier retention interface for select 2012-2025 vehicles from Hyundai, Kia
• Designed for amplified systems only
• Must be used with AXDIS-HK1 or AXDIS-HK2 (sold separately)

iDataLink Maestro HRN-HRR-HK3 Wiring Harness

Install a New iDataLink Compatible Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2016-2022 vehicles from Kia, Hyundai

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Install a New iDataLink Compatible Car Stereo and Retain Steering Wheel Controls and Other Factory Features in select 2016-2022 vehicles from Kia, Hyundai

• Stereo replacement harness for select 2016-2022 vehicles from Kia, Hyundai
• Designed for use with RR2 module
• Retains use of steering wheel controls and factory amplifier
• Retains factory backup camera, Retained Accessory Power

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List price $94.99
-16% $79.99

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Ships in 10-14 days

• Stereo replacement harness for select 2016-2022 vehicles from Kia, Hyundai
• Designed for use with RR2 module
• Retains use of steering wheel controls and factory amplifier
• Retains factory backup camera, Retained Accessory Power

iDataLink Maestro RR Interface Module

Universal Stereo Replacement Interface Module for iDataLink Maestro Compatible Stereos

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Universal Stereo Replacement Interface Module for iDataLink Maestro Compatible Stereos

• Universal stereo replacement interface module
• Connects to iDataLink-compatible stereos
• Retains SWC, voice commands, etc.
• Enhances multimedia experiences with exclusive gauges, vehicle info, parking assistance, climate control, and radar detection

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Universal – fits most vehicles.
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List price $229.99
-17% $189.99

In stock

• Universal stereo replacement interface module
• Connects to iDataLink-compatible stereos
• Retains SWC, voice commands, etc.
• Enhances multimedia experiences with exclusive gauges, vehicle info, parking assistance, climate control, and radar detection

iDataLink Maestro RR2 Interface Module

Universal Stereo Replacement Interface Module for iDataLink Maestro Compatible Stereos

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Universal Stereo Replacement Interface Module for iDataLink Maestro Compatible Stereos

• Advance stereo replacement interface for select vehicles
• Offers exclusive infotainment retention
• Adds support for additional vehicles
• Enables Bluetooth programming directly from mobile device
• Retains OnStar, SYNC, Uconnect, and more

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List price $319.99
-19% $259.99

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Crux ACP-WLX

Wireless CarPlay and Android Auto Dongle for Select OEM and Aftermarket Stereos with CarPlay or Android Auto

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Wireless CarPlay and Android Auto Dongle for Select OEM and Aftermarket Stereos with CarPlay or Android Auto

• Wireless CarPlay and Android Auto dongle
• Converts wired CarPlay and Android Auto to wireless
• Works on select OEM and aftermarket stereos with CarPlay or Android Auto
• Easy and hassle-free plug and play installation

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List price $357.00
-36% $229.50

In stock.

• Wireless CarPlay and Android Auto dongle
• Converts wired CarPlay and Android Auto to wireless
• Works on select OEM and aftermarket stereos with CarPlay or Android Auto
• Easy and hassle-free plug and play installation

iDataLink Maestro SR (ADS-MSR) Interface Module

Universal Stereo Replacement Interface Module for iDataLink Maestro Compatible Stereos

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Universal Stereo Replacement Interface Module for iDataLink Maestro Compatible Stereos

• Universal stereo replacement interface
• Retains factory steering wheel control
• Retains backup camera with any stereos
• Retains digital fade, DSP, gain, camera controls in iDataLink-ready stereos

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List price $169.99
-18% $139.99

In stock

• Universal stereo replacement interface
• Retains factory steering wheel control
• Retains backup camera with any stereos
• Retains digital fade, DSP, gain, camera controls in iDataLink-ready stereos

iDatalink Maestro ADS-MAR Wiring Interface

Factory Amplifier Replacement Interface for

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Factory Amplifier Replacement Interface for

• Factory digital amplifier replacement interface
• Compatible with
• Works with vehicle specific T-harnesses
• Compatible with an iDataLink-ready amplifier
• Supplies control data and audio

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List price $144.99
-17% $119.99

In stock

• Factory digital amplifier replacement interface
• Compatible with
• Works with vehicle specific T-harnesses
• Compatible with an iDataLink-ready amplifier
• Supplies control data and audio

Diamond Audio MSMP692LK24

1000W Peak (500W RMS) 6x9" 2-Way Coaxial Cut In-Speaker Lid Kit for

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1000W Peak (500W RMS) 6x9" 2-Way Coaxial Cut In-Speaker Lid Kit for

• 500 watts Peak Each, 250 watts RMS Each
• Horn Tweeter
• Impedance: 4 ohm
• Sensitivity: 101 dB

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$1,099.99

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• 500 watts Peak Each, 250 watts RMS Each
• Horn Tweeter
• Impedance: 4 ohm
• Sensitivity: 101 dB

Crux WVI-H

Wi-Fi Connectivity Integration and Audio/Video Interface for

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Wi-Fi Connectivity Integration and Audio/Video Interface for

• Enables wireless audio/video mirroring
• Accepts dual band (5GHz and 2.4GHz) Wi-Fi capability
• Uses your smartphone virtual remote control via Wi-Fi
• Provides an AV input which can also be used to add a camera

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List price $275.95
-38% $169.95

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• Enables wireless audio/video mirroring
• Accepts dual band (5GHz and 2.4GHz) Wi-Fi capability
• Uses your smartphone virtual remote control via Wi-Fi
• Provides an AV input which can also be used to add a camera

Crux ACP-WL

Wireless CarPlay Dongle for Select Factory and Aftermarket Stereos with Apple CarPlay

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Wireless CarPlay Dongle for Select Factory and Aftermarket Stereos with Apple CarPlay

• Wireless CarPlay Dongle
• Easily converts wired CarPlay to wireless
• Works with Kenwood, Pioneer, JVC, Sony, and Alpine stereos
• Includes interface and USB-A to USB-C cable
• Plug and play connection

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List price $317.10
-36% $203.85

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• Wireless CarPlay Dongle
• Easily converts wired CarPlay to wireless
• Works with Kenwood, Pioneer, JVC, Sony, and Alpine stereos
• Includes interface and USB-A to USB-C cable
• Plug and play connection

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    FAQ for Better sound with a factory radio in 2018 Optima

    Q: Can I upgrade or change the Better sound with a factory radio in 2018 Kia Optima?

    A: Yes this page includes all the best Better sound with a factory radio that work in your Optima.

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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.