🔧 Ignition Coils - Replacement

Your Tacoma uses one ignition coil on each spark plug. Replacing a weak coil can fix misfires, rough idle, hesitation, and check engine light issues.

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

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⚠️ Safety & Precautions

• Let the engine cool fully before starting. Coils sit on top of a hot engine.
• Disconnect the negative battery cable to prevent accidental shorts.
• Do not pull on the wiring; use the connector release tab.
• If a coil boot is stuck in the spark plug tube, remove it carefully so it does not tear.
• Keep dirt out of the spark plug wells.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4-inch ratchet
• 1/4-inch extension
• Trim clip removal tool
• Flat blade trim tool
• Torque wrench
• Gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil set - Qty: 6

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool.
• Disconnect the negative battery cable with a 10mm socket.
• If only one coil failed, it is still smart to inspect the spark plugs in that bank.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover and intake tube access parts

• Use a flat blade trim tool to release the engine cover, if equipped.
• If the intake duct blocks access, loosen the clamps with a screwdriver or the correct socket and move it aside.
• Keep all hardware organized.

Step 2: Disconnect the coil electrical connector

• Find the ignition coil on top of the cylinder head.
• Press the release tab and unplug the connector by hand.
• Do not yank the wires.

Step 3: Remove the ignition coil

• Use a 10mm socket and 1/4-inch ratchet with extension to remove the coil hold-down bolt.
• Twist the coil slightly, then pull it straight up and out.
• If the boot sticks, wiggle gently until it releases.

Step 4: Install the new ignition coil

• Compare the old and new coil to confirm they match.
• Push the new coil straight into the spark plug tube until fully seated.
• Install the hold-down bolt by hand first, then tighten with the 10mm socket.
• Torque to 7.5 Nm (66 in-lbs).

Step 5: Reconnect the connector and reassemble

• Plug the electrical connector back in until it clicks.
• Reinstall any intake ducting or engine cover you removed.
• Reconnect the negative battery cable with the 10mm socket.

Step 6: Repeat for any other failed coils

• If multiple coils are bad, replace them one at a time.
• For a cylinder misfire, inspect the matching spark plug too.

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✅ After Repair

• Start the engine and listen for smooth idle.
• Clear any stored misfire codes with a scan tool if needed.
• Test drive the truck and confirm the check engine light stays off.
• If a misfire returns, the spark plug or injector may also need inspection.

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💰 DIY vs Shop Cost

Shop Cost: $450-$900 (parts + labor)

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

You Save: $270-$480 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?

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.