🔧 CR-V - Ignition Coil Replacement

You’ll be removing the plastic engine cover, unplugging each ignition coil, and swapping in new ones on your CR-V. Each cylinder has its own ignition coil sitting on top of the spark plug.

This job helps fix misfires, rough running, poor fuel economy, and check-engine light codes related to ignition.

Difficulty Level: Beginner | Estimated Time: 1-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Always work on a cold engine to avoid burns.
• ⚠️ Turn ignition OFF and remove the key before starting.
• ⚠️ Disconnect the negative battery cable to avoid accidental short circuits.
• ⚠️ Don’t pull on wires; always pull on connectors and coil bodies.
• ⚠️ Keep metal tools away from the battery positive terminal to prevent sparks.
• ⚠️ Work in a well-ventilated area; avoid open flames or smoking near the vehicle.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🛠️ 10mm socket
• 🛠️ 8mm socket
• 🛠️ 1/4" drive ratchet
• 🛠️ 1/4" drive extension (3"-6")
• 🛠️ Torque wrench (inch-lb or low-range ft-lb)
• 🛠️ Flat trim tool or plastic pry tool
• 🛠️ Small flathead screwdriver
• 🛠️ Needle-nose pliers
• 🛠️ Shop rag or clean cloth
• 🛠️ Fender cover or old towel
• 🛠️ Mechanic gloves
• 🛠️ Safety glasses
• 🛠️ OBD2 scan tool (basic)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Ignition coil set (for 1.5L turbo, 4 coils) - Qty: 1 set (replace all 4 recommended)
• 🔩 Dielectric grease (spark plug boot grease) - Qty: 1 small tube
• 🔩 Battery terminal protector spray - Qty: 1 (optional)
• 🔩 Shop towels - Qty: 1 pack

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📋 Before You Begin

• Park your CR-V on level ground, shift to P, and set the parking brake.
• Open the hood and secure it with the hood prop rod.
• Note or take a photo of the engine bay so you remember hose and wire routing.
• Disconnect the negative battery terminal using a 10mm socket and move the cable aside so it can’t spring back.
• Keep nuts and bolts in a small container so you don’t lose them.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the plastic engine cover

• Lift off any decorative engine cover by pulling straight up; it’s usually held by rubber grommets.
• If your cover has a 10mm bolt, use the 10mm socket and 1/4" ratchet to remove it first.
• Set the engine cover aside in a safe place.

Step 2: Locate the ignition coils

• Look at the top of the engine; you will see four black ignition coils in a row, each with a wiring connector and one small bolt.
• Each coil sits directly over a spark plug.

Step 3: Disconnect the ignition coil electrical connectors

• An ignition coil connector is the plug that brings power and signals to the coil.
• On the first coil (cylinder 1, usually on the passenger side), use a small flathead screwdriver to gently lift the locking tab on the connector.
• With the tab lifted, pull the connector straight back with your fingers; don’t pull on the wires.
• Repeat this for all four coils, one at a time.
• If a connector is stuck, wiggle gently; don’t force it.

Step 4: Remove the ignition coil hold-down bolts

• Each coil has a small bolt (typically 10mm head) holding it to the valve cover.
• Use a 10mm socket, extension, and 1/4" drive ratchet to loosen and remove the bolt for the first coil.
• Place the bolt in your parts container.
• Repeat for the other three coils.

Step 5: Remove the ignition coils

• Grip the body of the coil and twist it gently left and right to break any seal.
• Pull the coil straight up and out of the spark plug tube.
• Inspect the coil boot (the rubber part) for oil, cracks, or burn marks.
• Repeat for all four coils, keeping note of their original positions in case you’re diagnosing a specific cylinder.

Step 6: Inspect the spark plug wells

• Look down into each spark plug hole with a light.
• If you see oil or a lot of dirt, carefully wipe around the opening with a shop rag to avoid dropping debris inside.
• If oil is present, valve cover gasket may need service later.

Step 7: Prepare and install the new ignition coils

• Apply a tiny amount of dielectric grease inside each new coil boot (the part that slides over the spark plug). This helps prevent moisture and sticking.
• Take the new coil for cylinder 1 and insert it straight down into the spark plug tube.
• Press gently until you feel it seat onto the spark plug.
• Align the bolt hole of the coil with the threaded hole in the valve cover.
• Repeat positioning for all four coils.

Step 8: Reinstall coil hold-down bolts and torque them

• Start the coil bolt for cylinder 1 by hand to avoid cross-threading.
• Use the 10mm socket, extension, and ratchet to snug the bolt down lightly.
• Once all four bolts are snug, use a torque wrench with the 10mm socket to tighten each bolt to 12 Nm (8.7 ft-lbs).
• Do not overtighten; the threads are in aluminum.

Step 9: Reconnect the ignition coil connectors

• Take the connector for cylinder 1 and push it straight onto the coil until you hear or feel a “click.”
• Gently tug to make sure it’s locked.
• Repeat for all four coils.
• Visually check that no connectors are half-seated or at an angle.

Step 10: Reinstall the engine cover

• Place the engine cover back over the engine, aligning the grommets with their mounting posts.
• Press down firmly until you feel it snap into place.
• If there was a bolt, reinstall it using the 10mm socket and snug it down. No specific torque is critical here; just firm, not forced.

Step 11: Reconnect the battery

• Reconnect the negative battery cable to the battery terminal.
• Use the 10mm socket and ratchet to tighten the clamp until it’s snug and doesn’t move by hand.
• Optionally spray a light coat of battery terminal protector on the terminal to reduce corrosion.

Step 12: Clear any stored codes (if present)

• Plug your OBD2 scan tool into the OBD2 port under the dashboard.
• Turn the ignition to ON (engine off) and follow the scan tool prompts to read and clear codes.
• If you had misfire codes (like P0301–P0304), confirm they are cleared.

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✅ After Repair

• Start your CR-V and let it idle for a few minutes. It should run smoothly with no shaking.
• Watch the dashboard for any new warning lights (especially the check engine light).
• Lightly rev the engine a few times and listen for smooth response, no misfire pops.
• Take a short test drive, including some acceleration. Confirm there is no hesitation or loss of power.
• Re-check under the hood to ensure all connectors are fully seated and nothing is left loose.

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💰 DIY vs Shop Cost

Shop Cost: $350-$550 (parts + labor)

DIY Cost: $120-$220 (parts only, all four coils)

You Save: $230-$330 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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