🔧 Ignition Coils - Replacement

Your Tacoma uses coil-on-plug ignition coils mounted on top of the engine. Replacing them is straightforward: disconnect the electrical connectors, remove the coils, and install the new ones with clean, dry spark plug wells.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

---

⚠️ Safety & Precautions

• Let the engine cool completely before starting.
• Turn the key off and keep it away from the truck.
• Disconnect the negative battery cable before removing coils.
• Do not pull on the wire; release each connector lock first.
• Keep dirt, water, and oil out of the spark plug wells.
• If you see oil in the plug wells, the valve cover gasket may be leaking and should be fixed first.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4-inch ratchet
• 1/4-inch extension
• Trim tool or small flat screwdriver
• Torque wrench
• Gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil set - Replace all four - Qty: 1 set

---

📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool down fully.
• Disconnect the negative battery cable before touching the coils.
• Work one coil at a time.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the battery

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

Step 2: Access the ignition coils

• Open the hood and locate the four ignition coils on top of the engine.
• If any engine cover is present, remove it by hand or with the 10mm socket if needed.

Step 3: Unplug each coil

• Use a trim tool or small flat screwdriver to release the connector lock.
• Pull the electrical connector straight off each coil.
• Do not pry on the wire.

Step 4: Remove the ignition coils

• Use a 10mm socket and 1/4-inch ratchet with extension to remove each coil hold-down bolt.
• Twist the coil gently and pull it straight up out of the spark plug well.
• Repeat for all four coils.

Step 5: Inspect the plug wells

• Look for oil, water, or dirt in each spark plug well.
• If debris is present, clean it out carefully before installing the new coils.
• A clean well helps prevent misfires.

Step 6: Install the new ignition coils

• Insert each new coil straight down into its matching cylinder.
• Seat the coil fully on the spark plug.
• Install the hold-down bolt and tighten with a 10mm socket and torque wrench.
• Torque to 8 Nm (71 ft-lbs).

Step 7: Reconnect the connectors

• Push each electrical connector onto its coil until it clicks.
• Make sure the lock tab is fully engaged.

Step 8: Reconnect the battery

• Reinstall the negative battery cable with a 10mm socket.
• Tighten it securely.

---

✅ After Repair

• Start the engine and let it idle.
• Listen for smooth operation and check for a check engine light.
• If the engine still misfires, inspect the spark plugs next.
• If you had a misfire code, clear it with a scan tool and recheck after a short drive.

---

💰 DIY vs Shop Cost

Shop Cost: $220-$450 (parts + labor)

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

You Save: $100-$170 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

---

🎯 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.