🔧 4Runner - Taillight Bulb Replacement

This procedure replaces the left and right rear stop/taillight bulbs. Each rear lamp assembly must be unbolted and pulled straight rearward to reach the bulb socket.

Assumption: “Both” means the stop/taillight bulb on each side.

Difficulty Level: Beginner | Estimated Time: 0.5-1 hour

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⚠️ Safety & Precautions

• ⚠️ Switch all exterior lights off and allow hot bulbs to cool.
• 🧤 Wear gloves and safety glasses because a damaged bulb can break.
• 🔋 Battery disconnection is not required for this repair.
• 💡 Use the specified incandescent bulbs unless compatible LED operation has been verified.
• 🚫 Do not force the lamp sideways; this can break its locating pins.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4-inch drive ratchet
• 3-inch socket extension
• Plastic trim-removal tool
• 1/4-inch drive inch-pound torque wrench
• Nitrile mechanic gloves
• Safety glasses
• Clean microfiber cloth

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 7443 clear dual-filament stop/taillight bulbs - Replace in pairs - Qty: 2

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📋 Before You Begin

• 🅿️ Park your 4Runner on level ground, select Park, apply the parking brake, and switch the ignition off.
• 💡 Confirm the headlight switch and hazard lights are off.
• 🚪 Open the rear liftgate completely to expose the lamp retaining bolts.
• 📦 Remove loose cargo that could interfere with your work.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the left lamp retaining bolts

• Use the 10mm socket, 3-inch socket extension, and 1/4-inch drive ratchet to remove the two bolts along the inside edge of the left rear lamp.
• Place the bolts somewhere safe so they cannot fall behind the bumper.

Step 2: Release the left lamp assembly

• Wear the nitrile mechanic gloves and hold the lamp securely.
• Pull the assembly straight toward the rear of your 4Runner to disengage its locating pins.
• If it is tight, use the plastic trim-removal tool gently between the lamp and body. Do not twist against the painted panel.
• Wiggle rearward gently; never pry sideways.

Step 3: Remove the left stop/taillight bulb

• Identify the stop/taillight socket behind the red lens area. It is the socket for the dual-function running light and brake light.
• Use your nitrile mechanic gloves to turn the socket counterclockwise approximately one-quarter turn, then pull it out.
• Pull the old 7443 bulb straight out of the socket using your gloved fingers.
• Do not pull on the wiring.

Step 4: Install and test the left bulb

• Push one new 7443 clear dual-filament bulb straight into the socket using your nitrile mechanic gloves.
• Temporarily switch on the parking lights and press the brake pedal with an assistant watching the lamp.
• If the bulb does not illuminate, switch the lights off, remove the bulb with your nitrile mechanic gloves, rotate it 180 degrees, and reinstall it.
• Switch the lights off before continuing.

Step 5: Reinstall the left socket and lamp

• Use your nitrile mechanic gloves to insert the socket and turn it clockwise until it locks.
• Align the lamp locating pins with their body grommets, then press the assembly straight forward by hand until fully seated.
• Start both bolts by hand to prevent cross-threading.
• Use the 10mm socket, 3-inch socket extension, and 1/4-inch drive inch-pound torque wrench to tighten both bolts to 5.4 Nm (48 in-lbs).
• Stop tightening as soon as torque is reached.

Step 6: Replace the right stop/taillight bulb

• Use the 10mm socket, 3-inch socket extension, and 1/4-inch drive ratchet to remove the two right lamp bolts.
• Pull the assembly straight rearward by hand. Use the plastic trim-removal tool gently only if needed.
• Using your nitrile mechanic gloves, turn the stop/taillight socket counterclockwise and remove it.
• Pull out the old bulb and push the second new 7443 clear dual-filament bulb straight into the socket.
• Reinstall the socket clockwise, align the locating pins, and press the lamp straight into place.
• Start both bolts by hand. Use the 10mm socket, extension, and torque wrench to tighten them to 5.4 Nm (48 in-lbs).

Step 7: Clean the work area

• Use the clean microfiber cloth to remove fingerprints from both lamp lenses.
• Make sure no tools or old bulbs remain near the liftgate opening before closing it.

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✅ After Repair

• 💡 Turn on the parking lights and verify that both taillights illuminate evenly.
• 🛑 Press the brake pedal and confirm that both bulbs become noticeably brighter.
• 🔍 Check that both lamp assemblies sit flush and do not move when touched gently.
• 🚨 Test the turn signals and hazard lights to ensure no nearby socket was disturbed.
• ♻️ Place the old bulbs in protective packaging before taking them to an appropriate automotive waste collection facility.

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💰 DIY vs Shop Cost

Shop Cost: $60-$130 (parts + labor)

DIY Cost: $8-$25 (parts only)

You Save: $52-$105 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.5 hour.

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🎯 Ready to get started?

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