🔧 Ignition Coils - Replacement

On your Tacoma, the ignition coils sit on top of each spark plug. Replacement means removing the engine cover, unplugging each coil, and swapping them one at a time to avoid mix-ups.

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

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⚠️ Safety & Precautions

• Let the engine cool completely before starting. Hot intake parts and coil boots can burn you.
• Keep metal tools away from battery terminals and exposed electrical connectors.
• Disconnect the negative battery cable if you want the safest possible job. This is recommended.
• Work one coil at a time so the connectors and coils do not get mixed up.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• Ratchet
• 6-inch extension
• Trim panel tool
• Torque wrench
• Needle-nose pliers
• Safety glasses
• Mechanic gloves
• Dielectric grease

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 6

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Shut the engine off and remove the key.
• Let the intake and engine cool down.
• If you are replacing all coils, label each cylinder position as you go.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the battery

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

Step 2: Remove the engine cover

• Pull up carefully on the engine cover to release it from the mounting grommets.
• If it feels stuck, use a trim panel tool to lift evenly.

Step 3: Access the ignition coils

• Locate the six coil packs on top of the valve covers.
• Work on one side at a time so nothing gets crossed up.
• Take a quick photo first.

Step 4: Disconnect each coil connector

• Press the connector lock tab and pull the electrical connector straight off.
• If a tab is tight, use a small flat trim panel tool to help release it gently.

Step 5: Remove the ignition coil bolts

• Use a 10mm socket, ratchet, and 6-inch extension to remove the coil hold-down bolts.
• Set each bolt aside in order so it goes back into the same spot.

Step 6: Remove the coils

• Twist each coil gently and pull it straight up out of the spark plug tube.
• If a coil sticks, wiggle it slowly instead of prying hard.
• Inspect the rubber boot for oil, cracks, or carbon tracking.

Step 7: Prepare the new coils

• Apply a small amount of dielectric grease inside each coil boot.
• Do not overpack the boot with grease.

Step 8: Install the new coils

• Push each new coil straight down onto its spark plug until fully seated.
• Install the hold-down bolts by hand first, then tighten with a torque wrench.
• Torque to 9 Nm (80 in-lbs).

Step 9: Reconnect the coil connectors

• Push each electrical connector on until it clicks into place.
• Give each one a gentle tug to confirm it is locked.

Step 10: Reinstall the engine cover and battery

• Press the engine cover back onto its mounting points.
• Reconnect the negative battery cable with a 10mm socket and tighten securely.

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✅ After Repair

• Start the engine and listen for smooth idle.
• Check the dash for a check engine light.
• If the engine still misfires, the spark plugs may also need replacement.
• Take a short road test and confirm normal acceleration.

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💰 DIY vs Shop Cost

Shop Cost: $420-$850 (parts + labor)

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

You Save: $240-$430 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?

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