🔧 Outback - Ignition Coil Replacement

Your Outback uses one ignition coil per cylinder (6 total). Replacing a coil is mostly about gaining access, unplugging the coil connector, swapping the coil, and torquing the hold-down bolt correctly so the coil seats on the spark plug.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a fully cool engine to avoid burns.
• ⚠️ Disconnect the negative battery terminal to prevent accidental shorting while unplugging coil connectors.
• ⚠️ Do not pull on wiring; press the connector lock tab and pull on the connector body.
• ⚠️ Keep dirt out of the spark plug wells—blow them out before removing coils.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 10mm wrench
• 1/4" drive ratchet
• 3/8" drive ratchet
• 3" extension (1/4")
• 6" extension (3/8")
• Torque wrench (inch-pound, 20–200 in-lb range)
• Flat trim tool
• Small pick tool
• Needle-nose pliers
• Compressed air blow gun
• Shop flashlight
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 (or Qty: 6 if replacing all)
• Dielectric grease (spark plug boot grease) - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and let the engine cool completely.
• Use a 10mm wrench to disconnect the negative battery terminal and isolate it so it can’t spring back.
• Tip: Replace one coil at a time.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover (if equipped)

• Lift the cover straight up by hand to release the grommets, then set it aside.

Step 2: Remove the air intake ducting for access (as needed)

• Use a flat trim tool to release intake clips and a 10mm socket to loosen any hose clamps that block access.
• Move the ducting aside without tearing or kinking hoses.

Step 3: Identify the coil you’re replacing

• Each coil sits on top of a spark plug and has an electrical connector plus a single hold-down bolt.
• Tip: Take a quick photo before unplugging.

Step 4: Unplug the ignition coil connector

• Press the connector lock tab and pull the connector straight off.
• If it’s stuck, use a small pick tool gently on the locking tab (don’t pry on the wires).
• A “click” means the tab released.

Step 5: Clean around the coil and spark plug well

• Use compressed air blow gun to blow dirt away from the coil area and down in the well.
• This helps prevent debris from falling onto the spark plug.

Step 6: Remove the ignition coil hold-down bolt

• Use a 10mm socket with a 1/4" drive ratchet and 3" extension (1/4") to remove the bolt.

Step 7: Remove the ignition coil

• Grip the coil body, twist slightly to break the seal, then pull straight out.
• If it’s tight, gently wiggle while pulling—do not use excessive prying.

Step 8: Prep and install the new ignition coil

• Apply a very small smear of dielectric grease inside the rubber boot (this helps sealing and future removal).
• Push the coil straight down until you feel it fully seat onto the spark plug.

Step 9: Reinstall the hold-down bolt and torque it

• Start the bolt by hand to avoid cross-threading.
• Use a torque wrench (inch-pound, 20–200 in-lb range) with a 10mm socket to tighten the bolt.
• Torque to 7.5 Nm (66 in-lb)

Step 10: Reconnect the coil connector

• Push the connector on until it clicks.
• Lightly tug to confirm it’s locked.

Step 11: Repeat for any other coils

• Work one coil at a time so connectors don’t get mixed up.

Step 12: Reinstall intake parts and reconnect the battery

• Reinstall any intake ducting removed using a 10mm socket and flat trim tool for clips.
• Reconnect the negative battery terminal using a 10mm wrench.

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✅ After Repair

• Start the engine and verify it idles smoothly.
• If you had a check engine light or misfire, clear codes with an OBD scan tool and confirm they do not return.
• Take a short test drive and re-check for any roughness or flashing check engine light (stop driving if it flashes).

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💰 DIY vs Shop Cost

Shop Cost: $350-$900 (parts + labor, depending on how many coils)

DIY Cost: $60-$480 (parts only, 1 coil to all 6)

You Save: $200-$450+ by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 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.