🔧 Ignition Coils - Replacement

On your Tacoma, the ignition coils sit on top of the engine and fire each spark plug. Replacing them is straightforward, but you need to work carefully so you do not crack a coil boot or damage a connector.

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

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⚠️ Safety & Precautions

• Let the engine cool fully before starting. The coil area gets very hot.
• Turn the ignition OFF and remove the key/fob from the vehicle.
• Disconnect the negative battery cable before unplugging any ignition coils.
• Do not pull on the wires. Use the connector tab to release each plug.
• If the engine has been misfiring, avoid cranking it repeatedly with coils unplugged.

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🔧 Required Tools

You'll need the following tools for this repair:

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

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil set - Qty: 6
• Ignition coil bolt set - Qty: 6

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool completely.
• Open the hood and support it securely.
• Disconnect the negative battery terminal with a 10mm socket.

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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 spring back and touch the terminal.

Step 2: Remove engine cover and intake ducting if equipped

• If your truck has a decorative engine cover, lift it off by hand.
• If the front intake duct blocks access, use a flat-blade trim tool to release any clips and a 3/8-inch ratchet with the correct socket to loosen the duct clamps.
• Set removed parts aside in order.

Step 3: Unplug the ignition coils

• Find the six ignition coils on top of the engine.
• Press the lock tab on each connector and pull the connector straight off by hand.
• Pull the connector, not the wires.

Step 4: Remove each coil

• Use a 10mm socket, 3/8-inch ratchet, and 3-inch extension to remove each ignition coil hold-down bolt.
• Lift each coil straight up and out of the spark plug tube.
• If a coil is stuck, twist it gently while pulling upward.

Step 5: Install the new coils

• Apply a small amount of dielectric grease inside each coil boot.
• Slide each new coil straight down onto its spark plug until fully seated.
• Reinstall each coil bolt by hand first, then tighten with a torque wrench.
• Torque to 10 Nm (89 in-lbs).

Step 6: Reconnect the wiring

• Push each electrical connector onto its coil until it clicks.
• Check that every plug is fully locked in place.

Step 7: Reinstall removed intake parts and battery cable

• Reinstall any intake ducting or engine cover you removed.
• Reconnect the negative battery cable with a 10mm socket.

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✅ After Repair

• Start the engine and let it idle.
• Listen for a smooth idle and watch for the check engine light.
• If the truck was misfiring, clear codes with a scan tool if needed.
• Take a short test drive and confirm normal acceleration.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

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

You Save: $270-$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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