🔧 Lancer - Rear Turn Signal Bulb Replacement

Your Lancer’s rear turn signal bulbs sit inside the tail lamp assemblies and can be replaced from inside the trunk. You’ll remove a small section of trunk trim, twist out the bulb socket, swap the bulb, and test the signals.

Difficulty Level: Beginner | Estimated Time: 0.3-0.7 hours

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⚠️ Safety & Precautions

• ⚠️ Turn ignition OFF and remove the key before starting.
• ⚠️ Let bulbs cool first; they can get hot.
• ⚠️ Don’t touch the glass bulb with bare fingers; skin oil can shorten bulb life.
• ⚠️ Support trunk trim so you don’t crack plastic clips.

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🔧 Required Tools

You'll need the following tools for this repair:

• Trim clip removal tool
• Phillips #2 screwdriver
• 10mm socket
• 1/4" ratchet
• Needle-nose pliers
• Flashlight
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear turn signal bulb (amber) - Replace in pairs - Qty: 2
• Dielectric grease - Qty: 1
• Trunk trim push clips - Qty: 2

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Open the trunk and clear out cargo so you can work comfortably.
• Tip: Use your phone light if needed.
• Assumption: This procedure matches the factory trunk-access tail lamp design; bulb size is verified by matching the old bulb markings.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the rear of the tail lamp

• Put on nitrile gloves and safety glasses.
• Use a flashlight to locate the trunk trim panel behind the tail lamp on the side you’re replacing.
• Remove push-clips using a trim clip removal tool (this tool lifts plastic fasteners without breaking them).
• If your trim has small screws, remove them with a Phillips #2 screwdriver.
• If there are small nuts holding a cover, remove them with a 10mm socket and 1/4" ratchet.

Step 2: Remove the turn signal bulb socket

• Find the bulb socket that corresponds to the turn signal (usually the amber bulb position).
• Grip the socket and rotate it counterclockwise about 1/4 turn by hand.
• Pull the socket straight out of the tail lamp housing.

Step 3: Replace the bulb

• Pull the old bulb straight out of the socket. If it’s tight, gently wiggle it while pulling; use needle-nose pliers only on the metal base, not the glass.
• Match the new bulb to the old bulb by comparing the number printed on the base (this prevents installing the wrong type).
• Install the new bulb by pushing it straight into the socket until fully seated.
• Apply a tiny smear of dielectric grease to the socket seal (dielectric grease is a non-conductive grease that helps keep out moisture).

Step 4: Reinstall the socket and trunk trim

• Insert the socket back into the tail lamp and rotate clockwise until it locks.
• Reinstall the trunk trim panel.
• Reinstall clips using the trim clip removal tool to line them up, then press them in by hand.
• If you removed nuts, snug them with a 10mm socket and 1/4" ratchet (do not overtighten; it’s easy to crack plastic).

Step 5: Repeat on the other side

• Replace the bulb on the opposite side using the same steps.
• Tip: Replacing both keeps brightness even.

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✅ After Repair

• Turn the ignition to ON and test left and right turn signals.
• Turn on the hazards and walk around the car to confirm both rear signals flash normally.
• If a signal flashes fast, re-check bulb seating and the socket lock.
• Make sure trunk trim is secure and not rubbing the wiring.

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💰 DIY vs Shop Cost

Shop Cost: $60-$140 (parts + labor)

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

You Save: $50-$110 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.