This procedure covers the removal and replacement of the audio amplifier located in the trunk area of the 2015 Kia Forte.

Warnings

Tools required

Parts

• Audio amplifier assembly × 1 — Use OEM specification
• Trim panel clips (if broken) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Turn ignition off and remove key from vehicle.
3. Open trunk and remove all items for clear access to trunk interior panels.
4. Disconnect battery negative terminal and wait 3 minutes for system discharge.

Procedure

1. 1

   Remove trunk side trim panel
   Locate the left side trunk trim panel where the amplifier is mounted (driver's side in trunk). Use trim panel removal tools to carefully pry out the plastic clips securing the panel. Start from the bottom edge and work upward. Remove any visible screws if present, then pull the panel away from the body to release remaining clips.
2. 2

   Locate the amplifier
   With the trim panel removed, identify the amplifier module mounted to the sheet metal. It will be a rectangular metal box with multiple wiring harness connectors attached. The amplifier is typically mounted on the left side panel near the rear wheel well area.
3. 3

   Disconnect wiring harnesses
   Identify all electrical connectors attached to the amplifier (typically 3-5 connectors including power, ground, and audio signal inputs/outputs). Press the locking tabs on each connector and carefully pull straight out to disconnect. Note the position and orientation of each connector. Check for any secondary locking mechanisms on connectors before pulling.
4. 4

   Remove amplifier mounting bolts
   Using a 10mm socket, remove the mounting bolts securing the amplifier to the body bracket. There are typically 3-4 bolts holding the amplifier. Support the amplifier with one hand while removing the final bolt to prevent it from falling.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
5. 5

   Remove amplifier from vehicle
   Carefully extract the amplifier from its mounting location, ensuring no wires are still connected or snagged. Check for any additional ground wires or straps that may need to be disconnected. Place the old amplifier on a clean, static-free surface if it will be kept for warranty exchange.
6. 6

   Prepare new amplifier
   Remove the new amplifier from its anti-static packaging. Compare it to the old unit to verify correct part. Transfer any mounting brackets if they are not pre-installed on the new unit. Ensure all mounting holes align properly.
7. 7

   Install new amplifier
   Position the new amplifier into the mounting location, aligning the bolt holes with the body bracket. Thread in all mounting bolts by hand first to ensure proper alignment. Once all bolts are started, torque them in a cross pattern to ensure even mounting pressure.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
8. 8

   Reconnect wiring harnesses
   Reconnect all electrical connectors to the new amplifier in their original positions, referring to photos taken during disassembly. Push each connector firmly until you hear and feel a positive click, indicating the locking tab has engaged. Verify each connector is fully seated by gently pulling back on it.
9. 9

   Reinstall trunk trim panel
   Position the trunk side trim panel back into place, aligning all mounting points. Press firmly at each clip location to secure the panel. Install any screws that were removed earlier. Ensure the panel sits flush and all edges are properly secured.
10. 10

    Reconnect battery and test system
    Reconnect the battery negative terminal. Turn the ignition to the ON position without starting the engine. Test the audio system by turning it on and checking all speakers for proper operation. Test various audio sources (radio, USB, Bluetooth) to verify full amplifier functionality. Check for any error messages on the display.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all trim panels are securely fastened with no loose clips or gaps.
2. Verify all electrical connections are fully seated and locked.
3. Check that no tools or parts were left in the trunk area.

Verification

• Turn on audio system and verify sound from all speakers (front left/right, rear left/right, and subwoofer if equipped).
• Test volume control and fade/balance adjustments to confirm amplifier is processing signals correctly.
• Check for any distortion, popping, or cutting out at various volume levels.
• Verify no warning lights or error messages appear on the instrument cluster or infotainment display.
• Confirm trunk trim panel is secure and properly aligned with no rattles.

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