🔧 4Runner - Taillight Bulb Replacement

You’ll remove each outer taillight housing, twist out the bulb socket, and swap in new bulbs. This fixes a burned-out light and restores safe visibility for braking/parking lights.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

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⚠️ Safety & Precautions

• ⚠️ Turn the light switch OFF and remove the key before starting.
• ⚠️ Let bulbs cool before touching; they can be hot.
• ⚠️ Don’t touch new glass bulbs with bare fingers; oils can shorten bulb life.
• ⚠️ Support the taillight as you remove it so it doesn’t drop and crack.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" ratchet
• 6" socket extension
• Plastic trim removal tool
• Nitrile gloves
• Safety glasses
• Clean shop towel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear stop/taillight bulb (7443) - Qty: 2
• Dielectric grease - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground and set the parking brake.
• 🚪 Open the rear liftgate for access.
• 🧰 A plastic trim removal tool is a pry tool that pops clips without scratching panels.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the taillight mounting nuts (one side)

• Open the liftgate.
• Use a plastic trim removal tool to pop open the small interior access cover behind the taillight area (left or right cargo-side trim).
• Put on nitrile gloves and safety glasses.

Step 2: Remove the taillight housing

• Use a 10mm socket, 6" socket extension, and 1/4" ratchet to remove the two 10mm nuts.
• With both nuts off, hold the taillight and pull it straight rearward to release the locating pins.
• Wiggle gently; don’t pry the paint.

Step 3: Remove the bulb socket

• Find the stop/taillight bulb socket on the back of the housing (usually the larger red-lens bulb position).
• Twist the socket counterclockwise by hand and pull it out.

Step 4: Replace the bulb

• Pull the old bulb straight out of the socket.
• Install the new Rear stop/taillight bulb (7443) by pushing it straight in until fully seated.
• If using dielectric grease, wipe a tiny amount on the socket seal (not the bulb glass) using a clean shop towel. Dielectric grease is a non-conductive grease that helps keep moisture out.

Step 5: Reinstall the socket and taillight

• Insert the socket and twist clockwise until it locks.
• Align the taillight locating pins and press the housing straight into place.
• Reinstall the two nuts using a 10mm socket, 6" socket extension, and 1/4" ratchet.
• Torque to 5.5 Nm (49 in-lbs).
• Snap the interior access cover back in using your hand pressure.

Step 6: Repeat on the other side

• Repeat Steps 1–5 for the opposite taillight.

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✅ After Repair

• 🔦 Turn the headlights ON and confirm both taillights illuminate evenly.
• 🛑 Press the brake pedal (or have a helper press it) and confirm both brake lights brighten.
• 🔍 Make sure the housings sit flush and there are no gaps around the lens.

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💰 DIY vs Shop Cost

Shop Cost: $70-$160 (parts + labor)

DIY Cost: $10-$30 (parts only)

You Save: $60-$130 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

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🎯 Ready to get started?

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