How to Replace Both Headlight Bulbs on a 2015-2018 Subaru Outback
Step-by-step low beam bulb replacement with tools, safety tips, and testing advice
How to Replace Both Headlight Bulbs on a 2015-2018 Subaru Outback
Step-by-step low beam bulb replacement with tools, safety tips, and testing advice for 2015, 2016, 2017, 2018
🔧 Headlight Bulbs - Replacement
Assumption: This guide covers the low beam headlight bulbs. On your Outback, the low beams are typically the bulbs people mean when they say “headlight bulbs.”
Replacing both bulbs is a straightforward job, but access is tight and you’ll work near hot engine parts. It’s best to replace both sides together so the light output stays even.
Difficulty Level: Beginner | Estimated Time: 0.5-1 hour
⚠️ Safety & Precautions
- Turn the headlights off and let the bulbs cool before touching anything.
- Do not touch the glass on halogen bulbs with bare fingers. Oil from skin can shorten bulb life.
- Work with the engine off and the key away from the vehicle.
- If you want extra safety, disconnect the negative battery terminal with a 10mm wrench.
- Be gentle with the bulb connector and headlamp housing clips.
🔧 Required Tools
You'll need the following tools for this repair:
- 10mm wrench
- Flathead trim tool
- Needle-nose pliers
- Safety glasses
- Mechanic gloves
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Low beam headlight bulb - Qty: 2
📋 Before You Begin
- Park on level ground and set the parking brake.
- Turn the headlight switch off.
- Open the hood and support it fully.
- Let the bulbs and headlamp area cool if the lights were just used.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Open the hood and locate the rear of each headlamp
- Open the hood and find the back side of each headlight assembly.
- You will see a dust cover or access cap behind each bulb.
- Take a quick photo before removal.
Step 2: Remove the access cover
- Use your hands first to twist or pull off the rear access cover on each headlamp.
- If the cover is tight, use a flathead trim tool gently to start it.
- Set the covers aside clean and dry.
Step 3: Unplug the old bulb
- Press the release tab and unplug the electrical connector from the bulb.
- If the connector is stubborn, use needle-nose pliers carefully on the plug body, not the wires.
Step 4: Remove the old bulb
- Rotate the bulb counterclockwise by hand and pull it out of the housing.
- Do not force it. If it resists, make sure the connector is fully removed first.
Step 5: Install the new bulb
- Put on mechanic gloves before handling the new bulb.
- Insert the new bulb into the socket and rotate it clockwise until it seats firmly.
- Reconnect the electrical connector until it clicks in place.
- Match the tab shape before twisting.
Step 6: Reinstall the access cover
- Reinstall the rear dust cover or access cap by hand.
- Make sure it is fully seated so moisture cannot enter the headlamp.
Step 7: Repeat on the other side
- Do the same steps on the second headlight bulb.
- Use the same method so both sides are installed evenly.
Step 8: Test the headlights
- Turn the headlights on and check both low beams.
- Make sure both lights are bright, even, and secure.
✅ After Repair
- Check that the headlight warning light is off.
- Verify both beams work on low and high settings if applicable.
- Inspect for a loose cover or any moisture inside the lamp.
- If one side does not light, recheck the bulb connector and seating.
💰 DIY vs Shop Cost
Shop Cost: $180-$320 (parts + labor)
DIY Cost: $40-$120 (parts only)
You Save: $140-$200 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1 hour.
🎯 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.


















