🔧 Fit - Ignition Coil Replacement

Your Fit uses one ignition coil per cylinder (4 total). Replacing a bad coil can fix misfires, rough idle, and blinking check-engine lights by restoring a strong spark to the spark plug.

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

---

⚠️ Safety & Precautions

• ⚠️ Let the engine cool fully before starting; coils sit on a hot cylinder head.
• ⚠️ Disconnect the negative battery cable to prevent accidental shorts.
• ⚠️ Pull coils straight up; don’t pry on plastic connectors.
• ⚠️ If the check-engine light is blinking, avoid driving until repaired (can damage the catalytic converter).

---

🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 6" extension (1/4" drive)
• Torque wrench (in-lb or small ft-lb range)
• Flat trim tool
• Needle-nose pliers
• Shop light
• Nitrile gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 4
• Dielectric grease (spark plug boot grease) - Qty: 1

---

📋 Before You Begin

• Park on level ground, set the parking brake, and open the hood.
• Let the engine cool for at least 30 minutes.
• Use a 10mm socket to disconnect the negative battery cable and move it aside so it can’t spring back.
• Dielectric grease helps prevent moisture and sticking.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the intake duct (if it blocks access)

• Use a flat trim tool to loosen any plastic clips holding the duct/resonator in place.
• Use needle-nose pliers to release any spring clamps, then move the duct out of the way.
• Set all clips/clamps aside where you won’t lose them.

Step 2: Locate the ignition coils

• The coils sit on top of the engine, one per cylinder, with an electrical connector and a small hold-down bolt.
• Use a shop light so you can clearly see each connector tab.

Step 3: Unplug the coil electrical connectors

• Press the connector lock tab with your thumb, then pull the connector straight off.
• If it’s stubborn, use a flat trim tool gently to help start it moving (do not break the tab).

Step 4: Remove the ignition coils

• Use a 10mm socket, 6" extension, and ratchet to remove the coil hold-down bolt.
• Grip the coil and twist slightly, then pull straight up to remove it.
• If a rubber boot stays stuck on the spark plug, pull it out carefully by hand and reinstall it onto the coil you removed.

Step 5: Install the new ignition coils

• Apply a very small amount of dielectric grease inside the rubber boot (a thin film only).
• Push the coil straight down onto the spark plug until it fully seats.
• Install the hold-down bolt by hand first to avoid cross-threading.
• Use a torque wrench and 10mm socket: Torque to 12 Nm (9 ft-lbs).

Step 6: Reconnect everything

• Plug each electrical connector back in until it clicks.
• Reinstall the intake duct/clips you removed using the flat trim tool and needle-nose pliers.
• Reconnect the negative battery cable with the 10mm socket.

---

✅ After Repair

• Start the engine and let it idle for 1-2 minutes; it should run smooth with no shaking.
• If the check-engine light stays on, you may need to clear stored misfire codes with a scan tool, or the issue may be spark plugs/fuel/air related.
• Take a short test drive and recheck that no connectors are loose.

---

💰 DIY vs Shop Cost

Shop Cost: $250-$550 (parts + labor)

DIY Cost: $120-$320 (parts only)

You Save: $130-$230 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.7-1.0 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.