🔧 Headlight Bulbs - Bulb Replacement

Assumption: This guide applies only if your XC90 has serviceable headlight bulbs. If your headlamps are factory LED units, the bulbs are not separately replaceable and the complete headlamp assembly must be serviced.

On this vehicle, access is tight and one side may require moving nearby components to reach the rear of the lamp. Replace both bulbs as a pair so light output stays even on both sides.

Difficulty Level: Intermediate | Estimated Time: 1-2 hours

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⚠️ Safety & Precautions

• Headlights can get very hot. Let the lamps cool before starting.
• Do not touch the glass on halogen bulbs with bare fingers. Skin oil shortens bulb life.
• Disconnect the negative battery terminal before touching headlamp wiring. This helps prevent short circuits.
• If your XC90 has HID/xenon lighting, the system uses high voltage. Do not touch the igniter or ballast with the system powered.
• Wear safety glasses and gloves.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• Ratchet
• Extension bar
• Trim tool
• Flat-blade screwdriver
• Gloves
• Safety glasses
• Fender cover

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Low beam headlight bulb - Qty: 2
• High beam headlight bulb - Qty: 2
• Headlamp rear cover seal - Qty: 2

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Turn the lights off and remove the key.
• Open the hood and let the lamp housings cool down.
• Disconnect the negative battery terminal with a 10mm socket.
• Keep the new bulbs in their packaging until install.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open access to the rear of the headlamp

• Open the hood and locate the rear of each headlamp assembly.
• If a cover, duct, or nearby bracket blocks access, remove it first with a trim tool or 10mm socket.
• Lay removed parts in order.

Step 2: Remove the bulb cover

• Use a flat-blade screwdriver or your fingers to release the rear bulb dust cover.
• Set the cover aside where dirt cannot get inside it.

Step 3: Disconnect the bulb connector

• Press the locking tab and unplug the connector from the bulb.
• Do not pull on the wires.

Step 4: Remove the old bulb

• Rotate the bulb holder counterclockwise or release the spring clip, depending on bulb style.
• Pull the bulb straight out.
• Match the tab positions before removing.

Step 5: Install the new bulb

• Install the new bulb in the same orientation as the old one.
• Use gloves and avoid touching the glass.
• Lock the bulb holder or spring clip back into place.

Step 6: Reconnect and test

• Reconnect the bulb connector until it clicks.
• Repeat the same steps on the other side.
• Reconnect the negative battery terminal with a 10mm socket.
• Turn on the headlights and confirm both low and high beams work.

Step 7: Reassemble the access area

• Reinstall the dust cover.
• Reinstall any ducting or brackets removed earlier.
• Make sure the headlamp covers are fully seated to keep moisture out.

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✅ After Repair

• Check both headlights in low beam and high beam.
• Check for a warning message on the dash.
• Verify the beam pattern against a wall at night.
• If one side is dim, recheck bulb seating and connector lock.

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💰 DIY vs Shop Cost

Shop Cost: $180-$500 (parts + labor)

DIY Cost: $40-$220 (parts only)

You Save: $140-$280 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 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.