🔧 Highlander - Taillight Bulb Replacement

Replacing both rear taillight bulbs on your Highlander is a beginner-friendly repair. The rear lamp assemblies are removed from the outside of the body, then the bulb sockets twist out from the back of each lamp.

Difficulty Level: Beginner | Estimated Time: 20-40 minutes

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⚠️ Safety & Precautions

• 🛑 Turn the ignition off and remove the key/fob from the vehicle before starting.
• ⚠️ Let the bulbs cool if the lights were recently on; bulbs can get hot.
• 🧤 Wear gloves. Skin oil can shorten bulb life if it gets on the glass.
• 🔋 Battery disconnect is not normally required for this bulb replacement.
• 💡 Do not force the lamp assembly. The rear locating pins can crack if pulled at an angle.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4-inch ratchet
• Plastic trim removal tool
• Clean nitrile gloves
• Safety glasses
• Microfiber towel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear taillight / stoplight bulb, 7443 clear - Qty: 2

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📋 Before You Begin

• Park your Highlander on level ground.
• Shift to Park and set the parking brake.
• Turn all exterior lights off.
• Open the liftgate fully so you can reach the inner edge of each taillight assembly.
• A plastic trim removal tool is a non-metal pry tool that helps release panels or lamp clips without scratching paint.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Liftgate

• Open the liftgate and stand behind the Highlander.
• Look at the inner edge of the taillight assembly, next to the liftgate opening.
• You will see the mounting bolts that hold the lamp to the body.

Step 2: Remove the Taillight Bolts

• Use a 10mm socket and 1/4-inch ratchet to remove the taillight mounting bolts.
• Place the bolts somewhere safe so they do not fall into the liftgate opening.
• Tip: Use a towel below the lamp.

Step 3: Release the Taillight Assembly

• Hold the taillight assembly with both hands.
• Pull it straight rearward, away from the vehicle.
• If it feels stuck, use a plastic trim removal tool carefully between the lamp and body to help release the locating pins.
• Do not twist the lamp sideways. Pulling straight back protects the guide pins.

Step 4: Find the Taillight Bulb Socket

• Look at the back of the taillight assembly.
• The taillight / stoplight bulb socket is the socket for the red rear running light and brake light.
• A bulb socket is the plastic holder that locks the bulb into the lamp housing.

Step 5: Remove the Old Bulb

• Use your hand to turn the bulb socket counterclockwise about a quarter turn.
• Pull the socket straight out of the lamp housing.
• Wear clean nitrile gloves, then pull the old bulb straight out of the socket.
• If the bulb is tight, gently wiggle it while pulling straight out.

Step 6: Install the New Bulb

• Push the new 7443 clear taillight / stoplight bulb straight into the socket until it seats fully.
• Use a microfiber towel to wipe the bulb glass if it was touched.
• Insert the socket back into the lamp housing.
• Turn the socket clockwise until it locks.

Step 7: Reinstall the Taillight Assembly

• Line up the taillight locating pins with the holes in the body.
• Push the lamp straight forward until it sits flush with the body panel.
• Use the 10mm socket and 1/4-inch ratchet to reinstall the mounting bolts.
• Tighten the bolts evenly. Torque to 5.4 Nm (48 in-lbs).
• Tip: Snug, not muscle-tight.

Step 8: Repeat on the Other Side

• Move to the opposite taillight assembly.
• Use the same 10mm socket, 1/4-inch ratchet, and plastic trim removal tool.
• Repeat the removal, bulb replacement, and installation steps.
• Torque the opposite taillight bolts to 5.4 Nm (48 in-lbs).

Step 9: Test the Lights

• Turn the parking lights on and check that both taillights glow red.
• Press the brake pedal and check that both lights get brighter.
• If working alone, use a safe reflection, garage door, or have someone stand behind the vehicle.

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✅ After Repair

• Make sure both taillight assemblies sit flush against the body.
• Check that no gap is visible around the lamp seals.
• Confirm the parking lights and brake lights both work on the left and right sides.
• If one bulb does not work, remove it and rotate it 180 degrees in the socket, then test again.
• No scan tool reset or infotainment reset is required for this repair.

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💰 DIY vs Shop Cost

Shop Cost: $90-$180 (parts + labor)

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

You Save: $80-$150 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.6 hours.

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🎯 Ready to get started?

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