🔧 Focus - Headlight Bulb Replacement (Both Sides)

Your Focus uses separate bulbs for low beam and high beam. The job is mostly about gaining access behind each headlight, then swapping the bulb without touching the glass.

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

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⚠️ Safety & Precautions

• ⚠️ Let the headlights cool first; bulbs get extremely hot.
• ⚠️ Don’t touch the new bulb’s glass with bare fingers; skin oils can shorten bulb life.
• ⚠️ Support the hood securely and keep loose clothing away from the cooling fan area.
• 🔋 Battery disconnect is not strictly required, but it’s safer if your hands are near wiring; if you disconnect it, loosen/tighten the negative terminal carefully.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Flashlight
• 10mm socket
• 1/4" drive ratchet
• 6" extension
• Flat trim tool

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Low beam headlight bulb (H11) - Qty: 2
• High beam headlight bulb (9005) - Qty: 2

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📋 Before You Begin

• Park on level ground, shift to Park (or in gear), and set the parking brake.
• Turn the headlight switch OFF and remove the key.
• If disconnecting the battery: use a 10mm socket to loosen the negative terminal and move it aside so it can’t spring back. Torque to 6 Nm (53 in-lbs) when reinstalling.
• Match bulb type before opening packages.

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🔨 Step-by-Step Instructions

Follow these steps in order:

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

• Open the hood and stand behind one headlight.
• The rear of the headlight has multiple round access areas; the bulb holders twist out by hand.
• If you’re unsure: low beams usually fail first and are used most often at night.

Step 2: Create working room (passenger side usually tighter)

• Use a flat trim tool to pop up any plastic push-pins holding the intake snorkel/upper air duct (if equipped).
• Move the ducting slightly out of the way by hand so you can reach the bulb area without forcing anything.
• If it feels stuck, re-check for hidden clips.

Step 3: Remove the rear dust cover (if equipped)

• Use your gloved hand (or a flat trim tool gently) to remove the round dust cap behind the headlight.
• Set it aside where it won’t pick up dirt (dirt can cause moisture issues later).

Step 4: Remove the old bulb

• Grip the bulb base and rotate it counterclockwise by hand to unlock it.
• Pull the bulb straight out.
• Press the connector tab and unplug the wiring from the bulb. (The “tab” is a small locking clip you press to release.)

Step 5: Install the new bulb (low beam H11 or high beam 9005)

• Put on nitrile gloves if you haven’t already.
• Plug the connector onto the new bulb until it clicks.
• Insert the bulb into the headlight housing, lining up the tabs.
• Twist clockwise by hand until it locks fully (snug, not forced).

Step 6: Reinstall the dust cover and any ducting

• Reinstall the rear dust cap by hand (make sure it seals evenly all the way around).
• Reposition the intake snorkel/ducting and reinstall any push-pins you removed using the flat trim tool to seat them.

Step 7: Repeat on the other headlight

• Do the same bulb type on the opposite side so brightness and color match.
• Replace in pairs for even lighting.

Step 8: Test the lights

• If you disconnected the battery, reconnect it using the 10mm socket. Torque to 6 Nm (53 in-lbs)
• Turn the headlights ON and confirm low beams and high beams both work.

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✅ After Repair

• Confirm both headlights match in brightness and color.
• Check that the dust covers are fully seated (prevents condensation inside the lens).
• If one side still doesn’t work, re-check the connector is fully clicked and the bulb is fully locked in.

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💰 DIY vs Shop Cost

Shop Cost: $120–$250 (parts + labor)

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

You Save: $90–$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.