Welcome to the installation guide for your Kicker 6 Speaker Plug & Play Bundle for the 2003–2009 Toyota 4Runner from Trail Grid Pro! This guide walks you through replacing the two front-door 6×9-inch speakers, two front-door 2.75-inch speakers, and two rear-door speakers. Read through the steps before starting and keep removed fasteners organized by location.
Table of Contents
- Important Notes Before You Begin
- Installation Video
- Tools Needed
- Step 1: Check Your Bundle
- Step 2: Remove the Front Door Panel
- Step 3: Remove the Factory Front Door Speakers
- Step 4: Install the Front Door 6×9-Inch Speaker
- Step 5: Install the Front Door 2.75-Inch Speaker
- Step 6: Reinstall the Front Door Panel
- Step 7: Remove the Rear Door Panel
- Step 8: Remove the Factory Rear Door Speaker
- Step 9: Install the Kicker Rear Door Speaker
- Step 10: Reinstall the Rear Door Panel
- Step 11: Test Your Installation
- Common Troubleshooting Solutions
- Contact Us
📢 Important Notes Before You Begin
Speaker bracket update: Kicker has changed the speaker mounting brackets. The brackets supplied with your bundle may look different from those shown in the video. Use the video as a reference for vehicle disassembly and reassembly, and follow the written bracket instructions below. If your supplied parts do not match these instructions, stop and contact us before modifying a bracket or forcing it into place.
Speaker locations: On this installation, the small 2.75-inch speakers are in the front doors. Follow this vehicle-specific guide rather than the dash-speaker instructions for other 4Runner generations.
Rear speaker sizes: This guide applies to both the 6.5-inch and 6.75-inch rear-door options.
⚠️ Important: Protect speakers, connectors, and trim.
Turn the vehicle and audio system off before disconnecting or reconnecting wiring. Handle speakers by their frames, not their cones or surrounds. Press connector release tabs and pull on the housings, not the wires. Photograph door-handle cable positions and support each trim panel while disconnecting it. Do not force a bracket that does not align with the mounting holes.
🎥 Installation Video
🛠️ Tools Needed
- 10mm socket and a compatible ratchet.
- Panel removal tool, preferably plastic.
- Phillips-head and flat-head screwdrivers.
- Side cutters.
- Zip ties.
📝 Step-by-Step Instructions
Step 1: Check Your Bundle
Lay out the parts before taking your doors apart.
- Check the packaging and speakers for shipping damage.
- Locate the two 6×9-inch speakers for the lower front doors.
- Locate the two 2.75-inch speakers for the upper front doors.
- Find the supplied front-speaker wiring adapters and prewired crossovers. A crossover is the component already connected to the supplied front-speaker wiring; keep these assemblies together.
- Locate the two 6.5-inch or 6.75-inch rear-door speakers and their wiring adapters.
- Separate the mounting brackets and screws by speaker location.
If anything is missing or damaged, contact us before starting.
Step 2: Remove the Front Door Panel
Work on one door at a time. Keep the panel close to the door until its cables and wiring are disconnected.
Remove the covers and fasteners:
- Use a panel tool to carefully lift off the small cover behind the interior door handle.
- Remove the Phillips-head fastener behind that cover.
- Lift the armrest pad to expose the second Phillips-head fastener.
- Remove the second fastener. Keep it separate from the handle fastener so each goes back in its original position.
- Find the round push-pin clip near the door hinges. Press the small center pin inward, then lift out the whole clip.
- Pull the triangular trim beside the mirror straight toward you to release it.
Lift off and disconnect the panel:
- Starting at the bottom, gently pull the panel away from the metal door to release its clips. Work along the bottom and up both sides. If it will not release, check for a fastener you missed.
- Once the clips are free, lift the panel straight up to unhook its top edge from the ledge beside the window.
- Hold the panel close to the door. Take a photo of the handle and lock cables before removing them.
- For each cable, lift its outer housing out of the retaining slot. Rotate the cable until the round metal ball at its end can lift out of the handle mechanism.
- Press the release tab on each electrical plug attached to the panel. Pull the plugs out by their plastic bodies, not their wires.
- Set the panel aside. If any panel clips stayed in the metal door, use a panel tool to remove them and put them back in the trim panel.
Step 3: Remove the Factory Front Door Speakers
- Unplug the wiring from the small upper speaker and the larger lower speaker. Press each plug’s release tab before pulling it out.
- Release any clips that hold the speaker wiring to the door, if needed to free the speaker assemblies. Do not pull on the wires.
- Hold the small upper speaker with one hand. Remove its two 10mm-head mounting bolts with the other.
- Lift out the small speaker and save its two bolts.
- Hold the larger 6×9-inch speaker while removing its four 10mm-head mounting bolts.
- Lift out the larger speaker and save its four bolts separately.
Step 4: Install the Front Door 6×9-Inch Speaker
The adapter ring is the supplied bracket that holds the new speaker in the factory opening.
- Place the 6×9-inch adapter ring against the door. Rotate it until its holes line up with the four factory mounting holes.
- Start all four saved bolts by hand. Once they are all threaded, tighten them evenly until the ring is secure. Do not overtighten.
- Find the wiring adapter with inline crossover supplied for the front-door 6×9-inch speaker.
- Push its smaller 1/8-inch connector onto the speaker’s matching small terminal. Push the larger 1/4-inch connector onto the matching large terminal. These flat push-on connections are called spade connectors.
- Plug the other end of the adapter into the factory speaker plug in the door.
- Lay the speaker wire in the channel in the adapter ring. Check that it will not be trapped between the speaker frame and ring or touch moving window parts.
- Set the speaker into the ring and line up the screw holes.
- Start each supplied Phillips screw a few turns before tightening any screw fully.
- Tighten the screws evenly until the speaker is secure. Keep the screwdriver away from the cone and the flexible edge around it.
Step 5: Install the Front Door 2.75-Inch Speaker
- Find the wiring assembly with inline crossover supplied for the small front-door speaker.
- Join the matching spade connectors on the wiring assembly and speaker leads. Make sure the insulating covers slide over the metal connections.
- Pass the speaker and its wiring through the larger mounting plate. Seat the speaker in the adapter.
- Place the smaller top plate over the speaker. Line up the mounting holes without pressing on the speaker’s flexible surround.
- Feed the wiring through the speaker mounting opening in the door.
- Line up the Kicker adapter with the factory speaker mounting bracket.
- Start both saved 10mm-head bolts by hand, then tighten until the assembly is secure. Do not overtighten.
- Plug the adapter harness into the factory small-speaker connector.
- Use zip ties to hold loose wiring away from moving parts and mounting holes. Do not pull the ties so tight that they damage the wires.
⚠️ Important: Check both speakers before replacing the panel.
Confirm that both brackets are secure, every plug is connected, the metal wire connections are insulated, and no wire is trapped under a speaker. If a bracket will not sit correctly, stop rather than tightening the screws harder.
Step 6: Reinstall the Front Door Panel
Reconnect the wiring and handle cables:
- Hold the panel near the door and reconnect the electrical plugs you removed.
- Put each handle or lock cable’s ball-shaped end back into its original slot.
- Rotate each cable housing back into position and secure it in its retainer. The white retainer goes above the green retainer; use your removal photo as a reference.
- Check that the handle and lock move freely. Do not close the door until they work correctly.
Attach the panel:
- Hook the panel’s top edge over the window ledge, then lower it into place.
- Check that the screw holes line up and that no wire or cable is trapped behind the panel.
- Press around the panel’s edges to seat its clips.
- Reinstall the larger Phillips fastener behind the armrest and the smaller one behind the interior handle.
- Press the triangular mirror trim back into place.
- Reset the round push-pin clip by moving its center pin outward. Put the clip body back in the panel hole, then press the center pin until it is flush.
- Replace the armrest pad and the cover behind the handle.
Repeat Steps 2–6 for the other front door.
Step 7: Remove the Rear Door Panel
- Carefully lift off the cover behind the interior handle.
- Remove the Phillips fastener behind the cover.
- Lift the armrest pad and remove the second Phillips fastener.
- Starting at the bottom, gently release the panel clips along the bottom and sides.
- Lift the panel upward to unhook it from the window ledge.
- Support the panel near the door and take a photo of the handle and lock cables.
- Lift each cable housing from its retainer. Rotate the cable and lift its ball-shaped end out of the mechanism.
- Press the release tabs and unplug the electrical connections attached to the panel.
- Set the panel aside. Move any clips left in the metal door back into the trim panel.
Step 8: Remove the Factory Rear Door Speaker
- Press the release tab on the speaker plug and unplug it.
- Hold the speaker while removing its three 10mm-head mounting bolts.
- Lift out the speaker and save all three bolts.
Step 9: Install the Kicker Rear Door Speaker
- Place the supplied rear-speaker adapter ring against the door. Line up its three holes with the factory mounting holes.
- Start all three saved bolts by hand, then tighten them evenly until the ring is secure.
- Find the wiring adapter supplied for the rear-door speaker. Do not use one of the front-door crossover assemblies.
- Push the smaller 1/8-inch connector onto the matching small speaker terminal and the larger 1/4-inch connector onto the matching large terminal.
- Plug the adapter into the factory speaker connector in the door.
- Lay the wire in the adapter ring’s channel so it will not be trapped beneath the speaker. Keep it clear of moving window parts.
- Set the 6.5-inch or 6.75-inch speaker into the ring and line up its screw holes.
- Start all supplied Phillips screws before tightening them evenly. Keep the screwdriver away from the cone and surround.
Step 10: Reinstall the Rear Door Panel
- Hold the panel near the door and reconnect its electrical plugs.
- Put the handle and lock cable ball ends back into their original slots.
- Rotate the cable housings into place and secure their retainers. The white retainer goes above the green retainer.
- Check that the handle and lock move freely before closing the door.
- Hook the panel’s top edge over the window ledge and lower it into place.
- Check that the screw holes line up and that no wiring is trapped.
- Press the panel clips back into place.
- Reinstall the larger Phillips fastener behind the armrest and the smaller one behind the handle.
- Replace the armrest pad and handle cover.
Repeat Steps 7–10 for the other rear door.
Step 11: Test Your Installation
- Remove all tools and loose fasteners from the vehicle.
- Check that the trim panels are secure.
- Turn on the radio at low volume and play a familiar track.
- Use the balance and fader controls, if available, to move the sound between speaker locations.
- Listen near each of the six upgraded speakers to make sure each is playing.
- Check for rattles, buzzing, missing sound, or distortion. Turn the vehicle and audio system off before checking any connections.
- Test the window switches, door locks, lights, and interior handles. Confirm that the handles and locks work before closing each door.
Congratulations on installing your Kicker 6 Speaker Plug & Play Bundle!
If you want to explore another upgrade, view the Kicker 5 Channel Amplifier & Subwoofer Kit.
🛠️ Common Troubleshooting Solutions
No Sound from One Speaker
Check balance and fader settings. With the vehicle and audio system off, confirm that the factory plug, adapter, and speaker terminals are fully connected. Check that each front-door speaker uses its intended crossover wiring assembly. Do not force mismatched plugs.
Buzzing, Rattling, or Bracket Misalignment
Inspect for loose trim clips, trapped wiring, or a speaker that is not seated flush. Confirm bracket orientation and mounting-hole alignment. Do not cut an unfamiliar bracket or overtighten screws to force it into position; contact us if the supplied parts do not fit.
A Window Switch, Door Light, Lock, or Handle Does Not Work
With the vehicle off, inspect the panel’s electrical connectors and compare cable positions with your removal photos. Fully seat cable housings in their retainers. Do not close the door until the handle and lock mechanisms work correctly.
Contact Us
Need help? Use our contact form and include your 4Runner’s model year, the speaker location, and clear photos of the bracket or connector in question.
