🔧 Ignition Coils - Replacement

Your ignition coils send high voltage to the spark plugs. When a coil fails, you can get rough running, misfires, poor fuel economy, or a flashing check engine light. This job is straightforward on your Accord and can be done at home with basic hand tools.

Difficulty Level: Beginner | Estimated Time: 0.5-1 hour

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⚠️ Safety & Precautions

• Let the engine cool completely before starting. Coils sit on top of the cylinder head and can be hot.
• Turn the ignition off and disconnect the negative battery cable before unplugging coils. The battery cable is the black cable on the battery.
• Do not pull on the wiring. Use the connector tab and the coil body only.
• If the engine has been misfiring hard, avoid driving it much before repair. Misfires can damage the catalytic converter.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• Ratchet
• 6-inch extension
• Trim tool
• Torque wrench
• Needle-nose pliers
• Gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 4

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool fully.
• Disconnect the negative battery cable before touching the coils.
• Keep dirt out of the plug wells.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover

• Use your hands to lift off the plastic engine cover.
• If it feels stuck, gently pry upward with a trim tool.

Step 2: Disconnect the battery

• Use a 10mm socket and ratchet to loosen the negative battery terminal.
• Move the cable aside so it cannot spring back to the battery post.

Step 3: Unplug the ignition coils

• Press the lock tab on each coil connector and pull the connector straight off.
• If a connector is tight, use a small trim tool to help release the tab.

Step 4: Remove the coil hold-down bolts

• Use a 10mm socket, ratchet, and extension to remove the coil bolts.
• Keep the bolts organized so they go back in the same spots.
• Torque to 9 N·m (80 in-lbs) on reassembly.

Step 5: Remove the old coils

• Twist each coil slightly, then pull it straight up out of the spark plug well.
• If a coil is stuck, wiggle it gently. Do not yank on the connector area.

Step 6: Install the new coils

• Push each new coil straight down into the spark plug well until it seats fully.
• Reinstall the hold-down bolts by hand first, then tighten with the 10mm socket and torque wrench.
• Seat each coil before tightening.

Step 7: Reconnect the wiring and battery

• Push each electrical connector on until it clicks.
• Reconnect the negative battery cable and tighten it with the 10mm socket.

Step 8: Reinstall the engine cover

• Set the cover back in place and press down evenly until it snaps on.

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✅ After Repair

• Start the engine and let it idle for a few minutes.
• Check for a smooth idle and confirm the check engine light is off.
• If the light stays on, clear the codes with a scan tool and recheck for misfires.
• If the misfire returns on the same cylinder, the spark plug or wiring may also need inspection.

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💰 DIY vs Shop Cost

Shop Cost: $280-$520 (parts + labor)

DIY Cost: $120-$280 (parts only)

You Save: $160-$240 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1 hour.

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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.