🔧 4Runner - Tail/Stop (Taillight) Bulb Replacement (Left & Right)

You’ll remove each rear taillamp housing, swap the bulb(s), then reinstall the housing. This restores proper rear lighting so other drivers can see you and you stay road-legal.

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

Assumption: your 4Runner uses replaceable tail/stop bulbs (common 7443 type). If your tail lamps are LED and no bulb socket exists, the lamp is not bulb-serviceable and the entire taillamp assembly must be replaced.

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⚠️ Safety & Precautions

• ⚠️ Turn ignition OFF and remove the key before working on exterior lights.
• ⚠️ Let bulbs cool before touching; they can burn you.
• ⚠️ Don’t touch new glass bulbs with bare fingers; skin oil can shorten bulb life.
• ⚠️ Support the taillamp when it pops loose so it doesn’t scratch paint.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 6" extension (1/4" drive)
• Plastic trim removal tool
• Nitrile gloves
• Safety glasses
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Tail/stop light bulb (typically 7443) - Qty: 2
• Dielectric grease (optional) - Qty: 1

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📋 Before You Begin

• Park on level ground and shift to Park.
• Open the rear liftgate and keep it fully supported.
• Set your flashlight nearby so you can see inside the lamp pocket.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the taillamp fasteners (one side)

• Open the liftgate.
• Locate the small interior access cover next to the taillamp (inside the cargo opening).
• Use a plastic trim removal tool to gently pop the cover off. (A trim tool is a plastic pry tool that helps prevent scratches.)

Step 2: Remove the taillamp housing

• Use a 10mm socket, 1/4" drive ratchet, and 6" extension to remove the two 10mm nuts holding the taillamp.
• Hold the taillamp with your other hand as you finish removing the nuts.
• Pull the taillamp straight rearward to release the alignment pins/clips.
• Wiggle gently—don’t pry on painted edges.

Step 3: Remove the tail/stop bulb socket

• Identify the tail/stop socket (commonly the larger dual-filament bulb socket).
• Twist the socket counterclockwise by hand and pull it out of the taillamp.
• If it’s tight, use nitrile gloves for better grip.

Step 4: Replace the bulb

• Pull the old bulb straight out of the socket.
• Install the new bulb by pushing it straight in until fully seated.
• If you have it, apply a tiny amount of dielectric grease to the socket seal (not on the bulb glass).
• Don’t touch the bulb glass.

Step 5: Reinstall the socket and taillamp

• Reinsert the bulb socket into the taillamp and twist clockwise until it locks.
• Line up the taillamp’s alignment pins with the body holes.
• Press the taillamp straight forward until it seats flush.
• Install the two 10mm nuts using a 10mm socket and ratchet: Torque to 5 N·m (44 in-lbs).
• Snap the interior access cover back in using hand pressure.

Step 6: Repeat on the other side

• Repeat Steps 1–5 for the opposite taillamp so both sides match in brightness and color.

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✅ After Repair

• Turn the ignition ON (engine not required) and switch on the parking lights to confirm both taillights illuminate.
• Press the brake pedal (or have a helper press it) to confirm both brake lights are bright.
• Verify the taillamps sit flush and don’t wiggle.
• If a bulb doesn’t work, remove it and re-seat the bulb and socket fully.

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💰 DIY vs Shop Cost

Shop Cost: $80-$180 (parts + labor)

DIY Cost: $10-$40 (parts only)

You Save: $70-$140 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?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.