🔧 Ignition Coils - Replacement

The ignition coils on your Versa sit on top of the spark plugs and provide the high voltage needed to fire each cylinder. If you have a misfire, rough idle, or a check-engine light with coil-related codes, replacing a bad coil can restore smooth running.

Difficulty Level: Beginner | Estimated Time: 0.5-1 hour

---

⚠️ Safety & Precautions

• Work on a cool engine only. Coils and valve cover parts can be very hot.
• Turn the ignition off and remove the key or keep the key fob away from the vehicle.
• Disconnect the negative battery cable before unplugging ignition components.
• Do not pull on the wiring harness. Always use the connector tab.
• If you find oil in the spark plug wells, fix the leak before installing new coils.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4-inch ratchet
• 6-inch extension
• Trim tool
• Small flat-blade screwdriver
• Torque wrench
• Dielectric grease
• Gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 per failed coil
• Valve cover gasket kit - Qty: 1 if oil is present in plug wells
• Dielectric grease - Qty: 1 tube

---

📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool completely.
• Disconnect the negative battery cable.
• If you are replacing one coil, it is best to identify the bad cylinder first with a scan tool.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover

• Pull straight up on the plastic engine cover to release it.
• If it feels stuck, use a trim tool to lift gently at the corners.

Step 2: Disconnect the coil electrical connector

• Locate the ignition coil on top of the engine.
• Use a small flat-blade screwdriver to release the connector lock if needed.
• Press the tab and pull the connector straight back.

Step 3: Remove the coil retaining bolt

• Use a 10mm socket and 1/4-inch ratchet with a 6-inch extension to remove the coil bolt.
• Keep the bolt aside for reuse.
• Lift the bolt out carefully.

Step 4: Remove the ignition coil

• Twist the coil gently, then pull it straight up out of the spark plug well.
• If it is stuck, wiggle it side to side while pulling up.

Step 5: Inspect the spark plug well

• Look for oil, water, or cracked coil boots inside the well.
• If the well is dirty, clean it before installing the new coil.

Step 6: Install the new ignition coil

• Apply a small amount of dielectric grease inside the coil boot.
• Push the new coil straight down onto the spark plug until fully seated.
• Reinstall the retaining bolt by hand first.
• Use a 10mm socket to tighten the bolt. Torque to 8 Nm (71 in-lbs).

Step 7: Reconnect the electrical connector

• Push the connector on until it clicks.
• Make sure the lock is fully engaged.

Step 8: Reinstall the engine cover and battery cable

• Press the engine cover back into place.
• Reconnect the negative battery cable and tighten it securely.

---

✅ After Repair

• Start the engine and listen for a smooth idle.
• Check the engine light. If it stays on, clear the code with a scan tool.
• Test drive the vehicle and make sure the misfire is gone.
• If the check-engine light returns, the spark plug or wiring may also need attention.

---

💰 DIY vs Shop Cost

Shop Cost: $180-$450 (parts + labor)

DIY Cost: $35-$120 (parts only)

You Save: $145-$330 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1 hour.

---

🎯 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.