🔧 4Runner - Rear Turn Signal Bulb Replacement

This job replaces the rear turn signal bulbs inside the tail lamp assemblies. A burnt bulb (or wrong bulb type) can cause a fast-blink turn signal and reduced visibility.

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

Assumption: factory tail lamps with non-LED rear turn bulbs.

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⚠️ Safety & Precautions

• 🛑 Turn the lights off and remove the key before starting.
• 🔥 Let the tail lamps cool if they were recently on.
• 🧤 Wear gloves; oils from fingers can shorten bulb life.
• ⚡ 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" ratchet
• 6" socket extension (1/4")
• Trim removal tool (plastic) (specialty)
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear turn signal bulb (7440A / amber) - Qty: 2

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📋 Before You Begin

• 🅿️ Park on level ground and shift to Park.
• 🚪 Open the rear liftgate for access to both tail lamps.
• 🧰 Set your trim tool and 10mm tools nearby so you don’t scratch paint reaching for them.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the tail lamp mounting covers

• Use the trim removal tool (plastic) (specialty) to gently pop off the two small interior covers on the inside edge of the tail lamp (they hide the nuts).
• Pry slowly to avoid breaking clips.

Step 2: Remove the tail lamp nuts

• Use a 10mm socket, 1/4" ratchet, and 6" socket extension (1/4") to remove the two 10mm nuts.
• Put the nuts somewhere safe so they don’t fall into the bumper area.

Step 3: Pull the tail lamp assembly outward

• With both nuts removed, grab the tail lamp and pull it straight back (away from the body).
• If it feels stuck, wiggle gently while pulling; alignment pins hold it in place.
• Pull straight back to protect the pins.

Step 4: Remove the rear turn signal bulb socket

• Find the turn signal socket on the back of the tail lamp (the socket that matches the turn signal bulb position).
• Twist the socket counterclockwise by hand and pull it out.
• A “bulb socket” is the plastic holder that locks into the lamp and holds the bulb.

Step 5: Replace the bulb

• Wear nitrile gloves.
• Pull the old bulb straight out of the socket.
• Push the new Rear turn signal bulb (7440A / amber) straight into the socket until fully seated.

Step 6: Reinstall the socket and test

• Insert the socket back into the tail lamp and twist clockwise to lock.
• Before reinstalling the tail lamp, turn the ignition to ON and test the turn signal and hazards.
• If it doesn’t light, turn the ignition off and re-seat the bulb and socket.

Step 7: Reinstall the tail lamp assembly

• Line up the tail lamp’s alignment pins with the body holes and press the lamp straight into place.
• Install the two nuts by hand first (to avoid cross-threading), then tighten with the 10mm socket and 1/4" ratchet.
• Torque to 5.4 Nm (48 in-lbs)
• Snap the two covers back on using firm hand pressure.

Step 8: Repeat on the other side

• Do the same steps on the opposite tail lamp.
• Replace bulbs in pairs for even brightness.

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✅ After Repair

• 🔎 Verify left and right turn signals blink normally (not fast).
• 🚨 Test hazards and brake lights to confirm nothing else was disturbed.
• 💧 After the next car wash or rain, check for any moisture inside the tail lamp (a sign the assembly didn’t seat fully).

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💰 DIY vs Shop Cost

Shop Cost: $70-$150 (parts + labor)

DIY Cost: $6-$20 (parts only)

You Save: $50-$140 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.7 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.