🔧 Highlander - Rear Turn Signal Bulb Replacement

Your Highlander’s rear turn signals are inside the rear tail lamp assemblies. The job is mostly trim removal, unbolting the lamp, swapping the bulb, then reassembling and testing.

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

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⚠️ Safety & Precautions

• ⚠️ Turn the ignition OFF and remove the key/fob from the vehicle.
• ⚠️ Let the bulbs cool before touching (they can get hot).
• ⚠️ Wear safety glasses when popping trim clips.
• ⚠️ Do not touch the new bulb glass with bare fingers; skin oils can shorten bulb life.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" ratchet
• 6" socket extension
• Trim clip removal tool
• Inch-pound torque wrench (0–100 in-lb range)
• Nitrile gloves
• Safety glasses
• Clean shop towel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear turn signal bulb (amber, 7440 type) - Qty: 2
• Rear combination lamp assembly - Qty: 1 (only if your turn signal is LED/non-serviceable)

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Open the rear hatch for access.
• Lay a clean shop towel nearby to set the lamp on (prevents paint scratches).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm which side and function you’re replacing

• Turn the ignition ON and switch on the turn signal (or hazards), then walk behind the vehicle.
• Turn ignition OFF once you confirm the failed side.

Step 2: Remove the interior access cover (cargo area)

• Open the hatch and locate the access panel/cover behind the tail lamp on the side you’re working on.
• Use a trim clip removal tool to gently pry the cover/clip(s) free. (A trim clip tool is a forked pry tool that pops plastic fasteners without breaking them.)

Step 3: Unbolt the tail lamp

• Use a 10mm socket, 6" socket extension, and 1/4" ratchet to remove the lamp retaining nuts.
• Place the nuts somewhere safe so they don’t drop into the body cavity.

Step 4: Pull the tail lamp housing straight back

• Support the lamp with both hands and pull it straight rearward to release the alignment pins/clips.
• If it feels stuck, wiggle gently—don’t pry against the painted body.
• Set the lamp on the clean shop towel.

Step 5: Remove the rear turn signal bulb socket

• Find the turn-signal socket on the back of the lamp (look for the socket that matches the bulb you confirmed earlier).
• Twist the socket counterclockwise by hand and pull it out.

Step 6: Replace the bulb

• Wear nitrile gloves.
• Pull the old bulb straight out of the socket.
• Push the new amber 7440-type bulb straight into the socket until fully seated.
• If touched, clean with alcohol and towel.

Step 7: Quick function test before reassembly

• Reinstall the bulb socket into the lamp and twist clockwise to lock.
• Turn ignition ON and test the turn signal/hazards.
• If it doesn’t light: turn ignition OFF, remove the socket, re-seat the bulb, and re-test.

Step 8: Reinstall the tail lamp

• Align the lamp’s guide pins with the body holes, then press the lamp straight in until it sits flush.
• Thread the nuts by hand first to avoid cross-threading.
• Use the inch-pound torque wrench with a 10mm socket to tighten the nuts: Torque to 5.4 Nm (48 in-lb).

Step 9: Reinstall the interior access cover

• Snap the access cover/trim clips back in place by hand.

Step 10: Repeat for the other side (recommended)

• Replace bulbs in pairs so color and brightness match left-to-right.

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✅ After Repair

• Test left turn, right turn, hazards, brake lights, and reverse lights.
• Confirm the lamp sits flush and there are no gaps (helps prevent water leaks).

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💰 DIY vs Shop Cost

Shop Cost: $120-$250 (parts + labor) (more if LED lamp assembly is required)

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

You Save: $90-$220 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.