Radio/Head Unit

This procedure covers the removal and replacement of the factory radio/head unit (infotainment display) in a 2018-2024 Honda Accord with the 1.5L turbo engine.

Warnings

Tools required

Parts

• Replacement radio/head unit (aftermarket or OEM) × 1 — Use OEM specification or compatible aftermarket unit
• Wiring harness adapter (if using aftermarket radio) × 1 — Vehicle-specific harness adapter
• Antenna adapter (if using aftermarket radio) × 1 — Honda to aftermarket antenna adapter
• Dash kit or trim bezel (if using aftermarket radio) × 1 — 2018-2024 Accord specific dash kit

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition off and remove key fob from vehicle
3. Disconnect negative battery terminal and wait 3 minutes to allow airbag system to discharge
4. Gather all replacement parts and verify compatibility with vehicle model year
5. If replacing with aftermarket unit, verify wiring harness adapter and dash kit are correct for your specific trim level (LX, Sport, EX, EX-L, Touring)

Procedure

1. 1

   Remove center console trim panels
   Using plastic trim tools, carefully pry out the lower console trim panel below the radio/HVAC controls. Start from the bottom edge and work upward, releasing the retaining clips. Remove the panel and set aside in a safe location to prevent scratches.
2. 2

   Remove climate control panel trim
   Gently pull the climate control trim bezel forward from the bottom edge using trim tools. This panel surrounds the temperature controls and radio. Work carefully around the perimeter to release all clips without breaking them. On models with integrated climate controls in the touchscreen, this step may differ - verify your configuration before proceeding.
3. 3

   Access radio mounting bolts
   With trim panels removed, locate the four radio mounting bolts (two on each side of the head unit). These are typically 10mm bolts. If present, disconnect any electrical connectors to trim panels or hazard switch that may restrict access.
4. 4

   Remove radio mounting bolts
   Using a 10mm socket with extension, remove all four mounting bolts securing the radio chassis to the dash framework. Keep bolts organized for reinstallation. Support the radio unit with one hand as you remove the final bolts to prevent it from falling.
5. 5

   Pull radio unit forward
   Carefully pull the radio assembly straight out from the dash approximately 4-6 inches. Do not pull too far as wiring harnesses are still connected to the rear. Use a flashlight to inspect the rear connections before proceeding.
6. 6

   Disconnect primary wiring harness
   Locate the main wiring harness connector on the back of the radio unit. Press the locking tab and pull the connector straight out. This connector typically has a sliding lock or tab that must be depressed before removal. Do not pull on wires, only on the connector body.
7. 7

   Disconnect antenna and auxiliary connections
   Disconnect the antenna cable by pulling straight out on the connector (do not twist). Disconnect any additional connectors including USB ports, auxiliary inputs, or secondary harnesses depending on trim level. Note the position and orientation of each connector for reinstallation.
8. 8

   Remove factory radio unit
   With all connections disconnected, remove the factory radio unit completely from the vehicle. If retaining the factory unit, place it in a safe location with connectors facing up to prevent damage.
9. 9

   Install wiring adapters (if using aftermarket radio)
   If installing an aftermarket radio, connect the wiring harness adapter to the factory harness. Connect the antenna adapter to the factory antenna cable. Verify all connections are fully seated and secure. Test fit any dash kit or mounting brackets before final installation.
10. 10

    Connect new radio unit
    Connect all wiring harnesses, antenna cable, and auxiliary connections to the new radio unit. Ensure each connector clicks into place and is fully seated. Route wiring neatly to prevent pinching when radio is installed into dash.
11. 11

    Test radio function before final installation
    Reconnect negative battery terminal temporarily. Turn ignition to accessory mode and verify radio powers on, all speakers function, and all features operate correctly. Test AM/FM reception, Bluetooth connectivity, and USB ports if equipped. If any issues are present, resolve before final installation.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
12. 12

    Install and secure radio unit
    Once function is verified, disconnect battery again. Carefully slide the radio unit back into the dash opening, ensuring no wires are pinched. Align mounting holes and install all four mounting bolts. Tighten bolts in a cross pattern to 8.0 Nm (6.0 lb-ft) to ensure even pressure and proper alignment.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
13. 13

    Reinstall trim panels
    Reinstall the climate control trim bezel by aligning all clips and pressing firmly around the perimeter until all clips seat. Reinstall lower console trim panel in the same manner. Verify all panels are flush and gaps are even around all edges.
14. 14

    Reconnect battery and finalize
    Reconnect the negative battery terminal and tighten to 6.0 Nm (4.0 lb-ft). Do not overtighten as this can damage the terminal or cable. Turn ignition to accessory mode and verify radio operation.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Verify all trim panels are securely clipped and flush with surrounding surfaces
2. Check that all radio functions including steering wheel controls operate correctly
3. If OEM radio was reinstalled, enter radio security code if prompted
4. Reset clock and restore radio presets as needed

Verification

• Turn ignition to accessory mode and verify radio powers on and displays correctly
• Test all audio sources: AM, FM, SiriusXM (if equipped), Bluetooth, USB, and auxiliary inputs
• Verify all speakers produce sound by adjusting balance and fader settings
• Test steering wheel audio controls for volume, track change, and source selection
• Verify backup camera display functions when vehicle is placed in reverse (if equipped)
• Check that all trim panels are secure with no rattles or loose clips
• Confirm climate controls function properly if integrated with head unit

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