🔧 Altima - Rear turn signal bulb replacement

You’ll be removing the trunk side trim, taking out the rear lamp, and swapping the turn signal bulb. This helps fix a fast-blinking signal or “bulb out” symptom and keeps you safe and legal.

Difficulty Level: Beginner | Estimated Time: 0.5–1 hour

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⚠️ Safety & Precautions

• ⚠️ Park the car on level ground, shift to P, and set the parking brake.
• ⚠️ Turn the ignition OFF and remove the key/fob from the vehicle.
• ⚠️ Do not work with the turn signals ON; bulbs can get hot.
• ⚠️ Keep metal tools away from the battery terminals to avoid short circuits.
• ⚠️ You do not need to disconnect the battery for this job if the ignition is OFF, but do not press any light switches while working.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🔧 10mm socket
• 🔧 1/4" drive ratchet
• 🔧 6" socket extension
• 🔧 Trim removal tool (plastic)
• 🔧 Flathead screwdriver (small)
• 🔧 Needle-nose pliers
• 🔧 Work light or flashlight
• 🔧 Mechanic gloves
• 🔧 Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Rear turn signal bulb (amber, 7440 type or equivalent) - Qty: 2 Replace in pairs
• 🔩 Rear combination lamp gasket (if damaged) - Qty: 1–2
• 🔩 Trunk trim clips - Qty: 2–4 In case clips break
• 🔩 Dielectric grease (bulb contacts) - Qty: 1 small tube

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📋 Before You Begin

• Park the Altima on a flat surface, set the parking brake, and turn ignition OFF.
• Open the trunk fully and clear out anything on the left and right sides.
• Have the new bulbs ready so the lamp isn’t left open for long.
• If someone can help, ask them to operate the turn signals later for testing.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the rear lamp from inside the trunk

• Open the trunk and locate the side trunk trim on the side where the bulb is out.
• Use the trim removal tool to gently pop out any plastic clips or retainers holding the side trim panel.
• If there are cargo hooks or small plastic nuts, remove them with the 10mm socket and ratchet.
• Carefully pull back the trunk side trim to expose the rear lamp mounting area and bulb sockets behind the body sheet metal.
• Pull slowly to avoid tearing the trim

Step 2: Remove the rear combination lamp (outer tail light)

• With the trim pulled back, you’ll see the rear lamp mounting studs with 10mm nuts.
• Use the 10mm socket, extension, and ratchet to remove the nuts holding the lamp to the body.
• Set the nuts aside somewhere safe so they don’t fall into the trunk lining.
• From outside the car, gently pull the lamp straight rearward. Wiggle slightly if needed to release the locator pins from the body.
• If it feels stuck, use your trim removal tool at the edge, but do not pry hard on the painted surface.
• Reinstallation torque for lamp nuts: 5.4 Nm (48 in-lbs)

Step 3: Disconnect the lamp and locate the turn signal bulb

• With the lamp pulled back, support it with one hand so it doesn’t hang by the wires.
• Press the tab on the main electrical connector and pull it off the lamp using your other hand or needle-nose pliers if tight.
• Look at the back of the lamp: the turn signal bulb is usually in the amber section or labeled “TURN” on the housing.
• The bulb holder is a plastic socket that twists into the lamp body.

Step 4: Remove the turn signal bulb socket and bulb

• Grip the turn signal bulb socket and rotate it about a quarter turn counterclockwise by hand.
• Pull the socket straight out from the lamp housing.
• Pull the old bulb straight out from the socket. If it’s tight, gently wiggle while pulling, or use needle-nose pliers carefully on the metal base, not the glass.
• Check the socket contacts for corrosion (green/white buildup). If present, clean lightly and consider replacing the socket.

Step 5: Install the new bulb

• Before inserting, apply a tiny amount of dielectric grease to the bulb base contacts to help prevent corrosion.
• Push the new rear turn signal bulb firmly into the socket until fully seated.
• Align the bulb socket tabs with the openings in the lamp housing.
• Insert the socket into the housing and rotate it clockwise about a quarter turn until it locks.
• Do not overtighten; just snug and fully seated

Step 6: Reconnect the lamp and test the new bulb

• Reconnect the main electrical connector to the rear lamp until it clicks.
• Temporarily hold the lamp in place against the body (you don’t need the nuts on yet).
• Have a helper sit in the driver’s seat, turn ignition to ON (engine can stay off), and activate the left or right turn signal.
• Confirm the new bulb flashes normally and at regular speed.
• Switch on the hazard lights to double-check both sides if you replaced both bulbs.
• Turn ignition OFF again once testing is done.

Step 7: Reinstall the rear lamp

• Align the locating pins on the lamp with the holes in the body.
• Carefully press the lamp straight forward into place so it sits flush with the body panel.
• From inside the trunk, reinstall the 10mm nuts onto the lamp studs by hand first to avoid cross-threading.
• Use the 10mm socket, extension, and ratchet to tighten the nuts evenly.
• Tighten lamp nuts to 5.4 Nm (48 in-lbs) – just snug, not “gorilla tight.”
• Check from outside that the lamp is even with the body and not tilted.

Step 8: Reinstall trunk trim and clean up

• Fold the side trunk trim back into its original position.
• Reinstall any trim clips by pressing them back into their holes by hand. Use the trim removal tool or flathead screwdriver gently if needed to center them.
• Reinstall any cargo hooks or plastic nuts using the 10mm socket and snug them down by hand.
• Remove tools and any old bulbs from the trunk area.

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✅ After Repair

• 🔁 Turn ignition ON and check the turn signal on the repaired side, then the other side.
• 🔁 Turn on hazard lights and walk around the car to confirm both rear turn signals flash evenly.
• 🔁 Check that the tail lights, brake lights, and reverse lights still work (you may have bumped another socket).
• 🔁 Make sure the trunk trim is secure and there are no loose tools left inside.

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💰 DIY vs Shop Cost

Shop Cost: $80–$150 (parts + labor)

DIY Cost: $10–$25 (parts only, replacing both bulbs)

You Save: $70–$125 by doing it yourself!

Shop labor rates vary but typically run $100–$150/hour. This repair takes a shop approximately 0.3–0.5 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 above to add everything to your cart.