📋 Disclosure: As an Amazon Associate, ModifiedLife earns from qualifying purchases. This helps keep our guides free — at no extra cost to you.
2017–2020 Chassis Codes: AD (6th Generation Sedan) | Model Years: 2017, 2018, 2019, and 2020
This page provides the complete 2017–2020 Hyundai Elantra radio wiring diagram for the sixth-generation AD sedan chassis. Use this guide when installing an aftermarket head unit or troubleshooting your factory stereo in a 2017, 2018, 2019, or 2020 Hyundai Elantra sedan.
The AD Elantra introduced a standard touchscreen display audio system across most trims, with Apple CarPlay and Android Auto compatibility added shortly after launch. Limited and Sport trims offered an available Infinity-branded premium audio package that added a factory amplifier and a rear-mounted subwoofer, a first for the Elantra sedan lineup. Hyundai refreshed the sedan’s front and rear styling for the 2019 model year without changing the factory head unit connector. The related Elantra GT hatchback sold during this era is built on a different platform (the PD-generation chassis shared with the Hyundai i30) and is covered in its own dedicated wiring guide rather than on this page.
🔗 In This Guide
2017–2020 Hyundai Elantra Stereo Wiring Diagram
Use the wiring table below for your 2017, 2018, 2019, and 2020 Hyundai Elantra stereo wire color codes, speaker wiring, and harness pinout.
| Wire Function | Wire Color & Location |
|---|---|
| Battery Constant Power Wire (12V+) | Red |
| Accessory Switched Power Wire (12V+) | Blue |
| Ground Wire | Black |
 (Simple Radio Install, Keep Steering Wheel Controls and Use Factory Amplifier) |
|
| Illumination Wire | Blue |
| Dimmer Wire | Gray |
| Antenna Trigger Wire | Red |
| Amplifier Trigger Wire/td> | N/A |
| Factory Amplifier Location | Right Side of Trunk |
| Rear View Camera Video Positive Wire (+) | N/A |
| Rear View Camera Video Negative Wire (–) | N/A |
| Center Speaker Positive Wire (+) | N/A |
| Center Speaker Negative Wire (–) | N/A |
| Front Left Tweeter Positive Wire (+) | Yellow (At Amplifier) |
| Front Left Tweeter Negative Wire (–) | Black (At Amplifier) |
| Front Right Tweeter Positive Wire (+) | Blue (At Amplifier) |
| Front Right Tweeter Negative Wire (–) | Red (At Amplifier) |
| Front Left Speaker Positive Wire (+) | Orange |
| Front Left Speaker Positive Wire (+) | White (At Amplifier) |
| Front Left Speaker Negative Wire (–) | Blue |
| Front Left Speaker Negative Wire (–) | Brown (At Amplifier) |
| Front Right Speaker Positive Wire (+) | Green |
| Front Right Speaker Positive Wire (+) | Yellow (At Amplifier) |
| Front Right Speaker Negative Wire (–) | Black (At Amplifier) |
| Front Right Speaker Negative Wire (–) | Orange |
| Rear Left Tweeter Positive Wire (+) | N/A |
| Rear Left Tweeter Negative Wire (–) | N/A |
| Rear Right Tweeter Positive Wire (+) | N/A |
| Rear Right Tweeter Negative Wire (–) | N/A |
| Rear Left Speaker Positive Wire (+) | Yellow |
| Rear Left Speaker Positive Wire (+) | Orange (At Amplifier) |
| Rear Left Speaker Negative Wire (–) | Black |
| Rear Left Speaker Negative Wire (–) | Green (At Amplifier) |
| Rear Right Speaker Positive Wire (+) | Brown |
| Rear Right Speaker Positive Wire (+) | Yellow (At Amplifier) |
| Rear Right Speaker Negative Wire (–) | White |
| Rear Right Speaker Negative Wire (–) | Black (At Amplifier) |
| Subwoofer Positive Wire (+) | N/A |
| Subwoofer Negative Wire (–) | N/A |
2017–2020 Hyundai Elantra Speaker Sizes and Locations
Use the speaker table below for your 2017, 2018, 2019, and 2020 Hyundai Elantra speaker sizes and locations.
| Speakers | Speaker Size & Location |
|---|---|
| Center Speaker Size | 3-1/2″ Speakers (Infinity Audio) |
| Center Speaker Location | Middle of the Dash (Infinity Audio) |
| Front Tweeter Speaker Size | 1″ Tweeters |
| Front Tweeter Speaker Location | Front Doors |
| Front Speaker Size | 6-3/4″ Speakers |
| Front Speaker Location | Front Doors |
| Rear Tweeter Speaker Size | N/A |
| Rear Tweeter Speaker Location | N/A |
| Rear Speaker Size | 6-3/4″ Speakers |
| Rear Speaker Location | Rear Doors |
| Subwoofer Speaker Size | 8″ Subwoofer (Infinity Audio) |
| Subwoofer Speaker Location | Rear Deck (Infinity Audio) |
Frequently Asked Questions
Does the Infinity premium audio system need an amplifier bypass on the 2017–2020 Elantra?
Limited and Sport trims equipped with the factory Infinity audio package route speaker output through a dedicated amplifier rather than powering speakers directly from the head unit. Installing an aftermarket head unit in one of these vehicles typically requires an amplifier bypass or bypass-and-retain harness so the factory amp continues to receive a proper signal, or a full amp/speaker replacement if you prefer not to retain the factory system. Base and SE trims without this option do not have a factory amplifier and do not require a bypass harness.
What harness adapter fits a 2017–2020 Hyundai Elantra radio installation?
The AD-generation Elantra commonly pairs with the Metra 70-7304 Wire Harness Adapter family, though the exact adapter needed depends on whether your trim has the factory Infinity Amplifier, since amplified systems require an amp-bypass version of the harness rather than the standard non-amplified harness used on base trims.
Will I lose my backup camera if I replace the factory touchscreen on this generation?
Most 2017–2020 Elantra trims include a standard backup camera integrated with the factory touchscreen display. Replacing the factory head unit with an aftermarket touchscreen radio generally requires a camera retention adapter to convert the factory camera’s video signal into a format the new Head Unit can display, since simply splicing the camera wire into an aftermarket Radio without the correct adapter will not produce a usable picture.
Does the 2019 facelift change the radio wiring on the AD Elantra?
The 2019 model year refresh updated the front grille, headlights, and rear taillight design, but Hyundai carried over the same factory Head Unit connector and audio wiring used on 2017–2018 models. A harness adapter or camera retention module that fits a pre-facelift 2017–2018 Elantra will also fit a facelifted 2019–2020 model with the same trim-level audio configuration.
Does the 2017–2020 Hyundai Elantra have steering wheel audio controls?
Steering wheel-mounted audio controls are standard equipment across the entire AD-generation Elantra lineup, including base SE trims. A SWC retention interface is strongly recommended when installing an Aftermarket Head Unit so the factory steering wheel buttons continue to operate volume, track, and voice command functions correctly.
Add Wiring Information
If you have verified 2017–2020 Hyundai Elantra radio wiring data — wire colors, pin locations, harness adapter tips, or speaker sizes — please share it in the comments below. Community-submitted data is reviewed and added to the table above to help other Elantra owners. If you have a question about your Hyundai Elantra stereo installation, post it below and our community will work to find an answer.