🔧 QX80 - Rear Turn Signal Bulb Replacement

Your QX80’s rear turn signal bulb sits inside the outer tail lamp assembly. The job is mostly trim access + removing the tail lamp so you can twist out the bulb socket and swap the bulb.

Assumption: Your QX80 uses a serviceable amber rear turn bulb (common type: 7440A). If your tail lamp is LED-only, there may be no bulb to replace.

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

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⚠️ Safety & Precautions

• ⚠️ Turn the ignition OFF and lights OFF before starting.
• ⚠️ Let the bulbs cool first; they can be hot.
• ⚠️ Do not touch the glass part of a halogen bulb with bare fingers (skin oils can shorten bulb life).
• ⚠️ Pull the tail lamp straight back; don’t pry hard on the painted body.
• ⚠️ 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" socket extension (1/4" drive)
• Phillips screwdriver #2
• Plastic trim removal tool set
• Torque wrench (inch-pound or low-range) (specialty)
• Nitrile gloves
• Safety glasses
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear turn signal bulb (amber, 7440A equivalent) - Replace in pairs - Qty: 2
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Open the liftgate for access and better lighting.
• Set your flashlight in the cargo area so you can see the access panels clearly.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the tail lamp fasteners

• Open the liftgate and stand at the rear corner on the side you’re replacing.
• Use a flashlight to locate the small interior access cover panel behind the tail lamp area in the cargo trim.
• Use a plastic trim removal tool set to pop off the access cover. A trim tool is a plastic pry tool that helps remove panels without scratching them.

Step 2: Remove the tail lamp retaining nuts/screws

• Use a 10mm socket, 6" socket extension (1/4" drive), and 1/4" drive ratchet to remove the tail lamp retaining nuts (typically 2).
• If your access cover uses screws, remove them with a Phillips screwdriver #2.
• Set the nuts aside where they won’t fall into the trim.

Step 3: Remove the tail lamp assembly

• Put on nitrile gloves and safety glasses.
• Grip the tail lamp and pull it straight rearward (toward you). It is held by alignment pins/clips.
• Wiggle gently; don’t yank.
• If it feels stuck, use a plastic trim removal tool set to gently help it release at the edge—do not pry on painted metal.

Step 4: Remove the turn signal bulb socket

• On the back of the tail lamp, find the turn signal bulb socket (usually the amber bulb position).
• Twist the socket counterclockwise by hand and pull it out of the housing.

Step 5: Replace the bulb

• Pull the old bulb straight out of the socket.
• Install the new rear turn signal bulb (amber, 7440A equivalent) by pushing it straight into the socket until fully seated.
• Apply a very small dab of dielectric grease to the socket seal if it looks dry (keep grease off the bulb glass).

Step 6: Reinstall the socket and tail lamp

• Insert the socket back into the tail lamp and twist clockwise until it locks.
• Line up the tail lamp’s guide pins/clips with the body holes, then push the lamp straight forward until fully seated.
• Reinstall the retaining nuts using a 10mm socket, 6" socket extension (1/4" drive), and 1/4" drive ratchet.
• Final tighten with a torque wrench (inch-pound or low-range) (specialty): Torque to 5 Nm (44 in-lbs).
• Reinstall the access cover using the plastic trim removal tool set (and Phillips screwdriver #2 if equipped with screws).

Step 7: Repeat for the other side (recommended)

• Replace the bulb on the other rear side using the same steps. Bulbs age together, so pairs help prevent another failure soon.

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✅ After Repair

• Turn the ignition ON and test both rear turn signals and the hazard lights.
• If the turn signal “blinks fast,” the bulb may be the wrong type, not seated, or another bulb on that side is out.
• Check that the tail lamp sits flush and even, with no gaps that could let water in.

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💰 DIY vs Shop Cost

Shop Cost: $80-$160 (parts + labor)

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

You Save: $50-$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?

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.