🔧 CR-V - Ignition Coil Replacement

You’ll be removing the plastic engine cover, unplugging each ignition coil, and swapping them with new ones on your CR-V. Ignition coils sit on top of the engine and create the high voltage needed to fire the spark plugs.

Difficulty Level: Beginner | Estimated Time: 0.75–1.5 hours

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⚠️ Safety & Precautions

• 🛑 Always work with the engine completely cool to avoid burns.
• 🛑 Turn the ignition OFF and remove the key before starting.
• 🛑 Disconnect the negative battery terminal to prevent accidental short circuits or check-engine lights while unplugging sensors.
• 🛑 Keep tools and parts away from the serpentine belt and fans at the front of the engine.
• 🛑 Do not pull on wires; always press the connector tab to unplug electrical plugs.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🧰 10mm socket
• 🧰 1/4" drive ratchet
• 🧰 3" extension (1/4" drive)
• 🧰 Small flathead screwdriver
• 🧰 Torque wrench (inch-lb or low-range ft-lb)
• 🧰 Fender cover or thick towel
• 🧰 Mechanic gloves
• 🧰 Safety glasses
• 🧰 OBD2 scan tool (basic code reader)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Ignition coil set (2.4L, coil-on-plug) - Qty: 4
• 🔩 Dielectric grease (tune-up grease) - Qty: 1 small tube
• 🔩 Battery terminal protector spray - Qty: 1 (optional)
• 🔩 Shop towels or rags - Qty: 2–4

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📋 Before You Begin

• Park your CR-V on level ground, shift to Park, and set the parking brake.
• Let the engine cool for at least 30–45 minutes if it was running.
• Open the hood and use the hood prop rod to secure it.
• Locate the battery on the left side of the engine bay as you face the car.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the battery

• Use the 10mm socket and 1/4" drive ratchet to loosen the nut on the negative (black, “-”) battery terminal.
• Lift the negative cable off the battery post and tuck it to the side so it cannot spring back.
• Always remove negative cable first for safety.

Step 2: Remove the plastic engine cover

• The engine cover is the large plastic piece on top of the engine with the Honda logo.
• Grip the front edge of the cover with both hands and pull straight up firmly to pop it off the rubber grommets.
• Lift the rear of the cover and remove it from the engine bay; set it aside somewhere safe.
• It is held by rubber clips, no screws.

Step 3: Locate the ignition coils

• On the now-exposed metal valve cover, you’ll see four black rectangular units in a row; these are the ignition coils.
• Each coil has an electrical connector and a single small bolt holding it down.
• Work on one coil at a time to avoid confusion.

Step 4: Unplug the first ignition coil

• Pick the coil at one end of the row (cylinder 1 is typically at the timing belt/chain end, but order does not matter for coil replacement).
• Use your fingers or a small flathead screwdriver to gently press down on the locking tab of the electrical connector.
• While holding the tab down, pull the connector straight back off the coil; do not yank on the wires.
• If stuck, wiggle gently while pulling.

Step 5: Remove the ignition coil bolt

• Use the 10mm socket, 3" extension, and 1/4" drive ratchet to remove the single bolt holding the coil to the valve cover.
• Turn the bolt counterclockwise until it comes out; keep it in a safe place so it does not fall into the engine bay.

Step 6: Remove the ignition coil

• Grip the top of the ignition coil and pull straight up to remove it from the spark plug well.
• If it feels stuck, gently twist it left and right while pulling up.
• Inspect the coil boot (the rubber tube) for oil or heavy carbon; oil here can indicate a valve cover gasket leak.

Step 7: Prepare the new ignition coil

• Take a new ignition coil from the box.
• Put a very thin film of dielectric grease inside the rubber boot opening where it will slide over the spark plug.
• Use only a small amount, not a glob.

Step 8: Install the new ignition coil

• Insert the new coil straight down into the spark plug well; push until it seats firmly onto the spark plug.
• Make sure the bolt hole on the coil lines up with the threaded hole on the valve cover.
• Install the original 10mm bolt by hand a few turns to avoid cross-threading.
• Use the 10mm socket and ratchet to snug the bolt down.
• Use the torque wrench with the 10mm socket to tighten the bolt to 12 Nm (8.7 ft-lbs).
• Do not overtighten; threads are in aluminum.

Step 9: Reconnect the coil electrical connector

• Push the electrical connector straight onto the coil until you hear or feel a “click.”
• Lightly tug on the connector to be sure it is locked in place.

Step 10: Repeat for the remaining three coils

• Repeat Steps 4–9 for each of the remaining three ignition coils, one at a time.
• Always fully finish one coil (remove, replace, reconnect) before starting the next; this helps avoid mixing connectors.

Step 11: Reinstall the engine cover

• Position the plastic engine cover over the engine so the rubber grommets line up with the mounting posts.
• Press down firmly at each corner until the cover snaps into place on the rubber mounts.

Step 12: Reconnect the battery

• Place the negative battery cable back onto the negative battery post.
• Use the 10mm socket and ratchet to tighten the negative terminal nut until snug; do not overtighten.
• If using battery terminal protector spray, apply a light coat now.

Step 13: Start the engine and check operation

• Start your CR-V and let it idle.
• The engine should run smoothly, without shaking, misfiring, or flashing check engine light.
• If the check engine light stays on, use the OBD2 scan tool to read and clear codes, then see if they return.
• If a code for one cylinder returns, recheck that coil’s connector.

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✅ After Repair

• Let the engine warm up and verify smooth idle and normal acceleration on a short test drive.
• Use an OBD2 scan tool to clear any stored misfire codes (for example, P0301–P0304) if present.
• After the test drive, re-open the hood and double-check that the engine cover is secure and all connectors appear fully seated.
• Over the next few days, pay attention to fuel economy and engine response; they should be at least as good as before, often better.

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💰 DIY vs Shop Cost

Shop Cost: $350–$550 (parts + labor)

DIY Cost: $120–$260 (parts only, full set of 4 coils)

You Save: $230–$290 by doing it yourself!

Shop labor rates typically run $100–$150/hour. This repair takes a shop approximately 0.7–1.0 hours.

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🎯 Ready to get started?

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