🔧 Sonata - Headlight Bulb Replacement

You’ll replace the headlight bulbs on both sides (left and right) by accessing the back of each headlamp housing, removing the old bulb, and installing a new one without touching the glass. This restores safe night visibility and prevents one dim/failed bulb from overworking the other.

Assumption: Your Sonata uses halogen bulbs; confirm the exact bulb type by matching the number printed on the old bulb (common types are H7 for low beam and 9005 for high beam).

Difficulty Level: Beginner | Estimated Time: 0.5-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Let the headlights cool before touching the housing or bulb.
• ⚠️ Do not touch the new bulb glass with bare fingers (skin oils shorten bulb life). Use nitrile gloves or wipe with isopropyl alcohol if you accidentally touch it.
• ⚠️ Turn the lights OFF and remove the key before starting.
• ⚠️ If you’ll be working near the battery positive terminal, remove jewelry and use care to avoid shorting.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Flashlight
• Trim clip removal tool
• 10mm socket
• 1/4" drive ratchet
• 6" extension for 1/4" ratchet
• Phillips screwdriver #2
• Isopropyl alcohol
• Clean lint-free towel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Low beam headlight bulb (match type from old bulb, commonly H7) - Qty: 2
• High beam headlight bulb (match type from old bulb, commonly 9005) - Qty: 2 (only if replacing high beams too)
• Replacement plastic push clips (splash shield/liner) - Qty: 2-6 (optional, in case any break)

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Turn the headlight switch OFF and remove the key.
• Open the hood and use a flashlight to locate the rear covers/connectors on each headlamp assembly.
• Tip: Replace bulbs in pairs for color match.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Identify which bulb you’re replacing (low vs high)

• Use a flashlight behind the headlamp to find the bulb locations.
• Low beam is typically the larger rear dust-cap area on the headlamp housing; high beam is usually a separate smaller socket.
• Plan to do the same steps on the other side once you finish the first side.

Step 2: Create working room (if needed)

• If your hand access is tight, remove nearby intake/cover pieces using a 10mm socket, 1/4" ratchet, and 6" extension.
• Remove any plastic push-clips with a trim clip removal tool (this tool lifts the clip without snapping it).
• Tip: Put bolts/clips in a small cup.

Step 3: Remove the electrical connector from the bulb

• Grip the connector (not the wires) and pull it straight back.
• If it has a lock tab, press the tab with your thumb (or gently with a Phillips screwdriver #2) while pulling.

Step 4: Remove the dust cap (if equipped)

• Twist the rear dust cap counterclockwise by hand and remove it.
• Set it aside somewhere clean and dry.

Step 5: Remove the old bulb

• If the bulb is a twist-lock style, rotate it counterclockwise and pull it out.
• If the bulb is held by a metal spring retainer, press and unhook the spring, then swing it open and remove the bulb.
• Look at the bulb base and note its orientation (tabs/slots) so the new bulb seats the same way.

Step 6: Install the new bulb (no-touch rule)

• Put on nitrile gloves.
• Insert the new bulb into the housing in the same orientation as the old one.
• Lock it in place by twisting clockwise, or re-latching the spring retainer (depending on your bulb holder style).
• If you accidentally touch the glass, wipe it with isopropyl alcohol and a clean lint-free towel, then let it dry.

Step 7: Reinstall dust cap and reconnect the connector

• Reinstall the dust cap and twist clockwise until snug (hand-tight only).
• Push the electrical connector onto the bulb until it clicks or feels fully seated.

Step 8: Repeat on the other side

• Do the same removal/installation steps on the opposite headlamp.
• Use your flashlight to confirm both connectors and dust caps are fully installed.

Step 9: Reinstall any parts you moved for access

• Reinstall any covers, air ducting, or brackets you removed using a 10mm socket, 1/4" ratchet, and 6" extension.
• Reinstall push-clips by pressing them in by hand (use the trim clip removal tool only if you need help aligning).

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✅ After Repair

• Turn the headlights ON and confirm both sides illuminate.
• Test high beams and low beams to make sure you didn’t replace the wrong bulb.
• Check that the dust caps are sealed (this helps prevent moisture/fogging inside the headlamp).
• At night, verify the beam pattern looks even; if one side looks odd, the bulb may not be fully seated.

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💰 DIY vs Shop Cost

Shop Cost: $120-$260 (parts + labor)

DIY Cost: $30-$120 (parts only, depending on bulb type/brand)

You Save: $90-$140 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?

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