🔧 Ignition Coils - Replacement

Replacing the ignition coils on your Accord can fix misfires, rough idle, hard starting, and check-engine lights. On the V6, the front bank coils are easy to reach, but the rear bank coils sit under the intake manifold and take more work.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

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⚠️ Safety & Precautions

• Let the engine cool fully before starting.
• Disconnect the negative battery cable before unplugging coils. The battery is the 12-volt power source.
• Do not pull on ignition coil wiring by hand; use the connector tab.
• Keep dirt out of the spark plug wells. Debris can fall into the cylinder.
• If you remove the intake manifold, replace the seals and gaskets as needed.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 8mm socket
• 3/8-inch ratchet
• 3-inch extension
• 6-inch extension
• Torque wrench
• Flat-blade trim tool
• Needle-nose pliers
• Dielectric grease
• Fender cover
• Gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil set - Qty: 6
• Intake manifold gasket set - Qty: 1
• Throttle body gasket - Qty: 1
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool down so you do not burn your hands.
• Disconnect the negative battery cable before unplugging any ignition parts.
• Work clean. Keep bolts and connectors organized.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect power

• Use a 10mm socket to remove the negative battery cable from the battery.
• Move the cable aside so it cannot touch the battery terminal.

Step 2: Remove the engine cover and intake duct

• Lift off the engine cover by hand.
• Use an 8mm socket and flat-blade trim tool to loosen and remove the air intake duct and any clamps in the way.
• Set the ducting aside so the front of the engine is open.

Step 3: Replace the front bank ignition coils

• On the front side of the engine, unplug each ignition coil connector by pressing the release tab.
• Use a 10mm socket to remove each coil hold-down bolt.
• Pull each coil straight up.
• Apply a thin film of dielectric grease inside the coil boot. Dielectric grease helps protect the electrical connection from moisture.
• Install the new coils and tighten the bolts to 12 N·m (9 lb-ft).
• Reconnect each coil connector until it clicks.

Step 4: Remove the intake manifold for rear bank access

• Use an 8mm socket and 10mm socket to remove the intake tube, throttle body connections, vacuum hoses, and harness clips attached to the upper intake area.
• Unplug the throttle body connector and any related sensors you need to move.
• Use a 10mm socket with a 6-inch extension to remove the intake manifold bolts/nuts.
• Lift the intake manifold off carefully.
• Replace the intake manifold gasket and throttle body gasket if removed or damaged.
• Keep the ports covered.

Step 5: Replace the rear bank ignition coils

• Unplug the rear coil connectors.
• Use a 10mm socket to remove the rear coil hold-down bolts.
• Pull the coils straight out.
• Install the new rear coils with a light coat of dielectric grease in the boot.
• Tighten the coil bolts to 12 N·m (9 lb-ft).
• Reconnect the rear coil connectors.

Step 6: Reinstall the intake manifold

• Set the manifold back in place with fresh gaskets.
• Use a 10mm socket and torque wrench to tighten the manifold fasteners evenly in a crisscross pattern to 22 N·m (16 lb-ft).
• Reconnect all vacuum lines, sensors, and the throttle body connector.
• Reinstall the intake duct and clamps using the 8mm socket.

Step 7: Reconnect power and verify

• Reconnect the negative battery cable with a 10mm socket.
• Start the engine and let it idle.
• Check for rough running, warning lights, or loose connectors.
• If the check-engine light was on, clear codes with a scan tool after confirming the repair.

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✅ After Repair

• Listen for a smooth idle and normal acceleration.
• Check that no engine light returns.
• If a misfire code returns, inspect the spark plugs next.
• Take a short test drive and recheck for leaks or loose intake parts.

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💰 DIY vs Shop Cost

Shop Cost: $450-$950 (parts + labor)

DIY Cost: $180-$420 (parts only)

You Save: $270-$530 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-4 hours.

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🎯 Ready to get started?

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