🔧 CR-V - Ignition Coil Replacement

Replacing the ignition coils on your CR-V is a straightforward top-of-engine repair. The ignition coils sit on top of the spark plugs and send high voltage to fire each plug; a bad coil can cause misfires, rough idle, poor acceleration, or a check engine light.

Difficulty Level: Beginner | Estimated Time: 30-60 minutes

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⚠️ Safety & Precautions

• ⚠️ Let the engine cool completely before working; the turbocharged 1.5L engine can stay hot for a long time.
• ⚠️ Disconnect the negative battery terminal before unplugging ignition coils to reduce the chance of electrical damage.
• ⚠️ Do not pull on wiring harnesses. Press the connector lock tab and pull the connector body only.
• ⚠️ Keep dirt and debris away from the spark plug wells. Anything dropped inside can damage the engine.
• ⚠️ Replace only one coil at a time if you are new to this, so each connector goes back in the correct location.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 3/8-inch ratchet
• 3/8-inch torque wrench
• 6-inch extension
• Trim clip removal tool
• Small flathead screwdriver
• Compressed air blow gun
• OBD2 scan tool
• Nitrile gloves
• Safety glasses

A torque wrench tightens bolts to the correct measured tightness.

An OBD2 scan tool reads and clears engine fault codes.

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1-4
• Dielectric grease - Qty: 1 small tube

Note: If one coil failed, you may replace only the failed coil. If mileage is high or multiple misfire codes are present, replacing all four as a set is often the better long-term repair.

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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 until it is safe to touch.
• 🔋 Open the hood and disconnect the negative battery cable using a 10mm socket.
• 🧠 If you have a check engine light, use an OBD2 scan tool before removing parts and write down the misfire code, such as P0301, P0302, P0303, or P0304.
• 🔢 Cylinder numbering on the 1.5L engine is from the passenger side to the driver side: cylinder 1, 2, 3, 4.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the Engine Cover

• Use your hands to lift the plastic engine cover upward from its rubber mounting grommets.
• If any trim clips are present near the work area, use a trim clip removal tool to lift them gently.
• Set the cover aside where it will not get stepped on.
• Lift evenly to avoid cracking plastic.

Step 2: Clean Around the Ignition Coils

• Put on safety glasses before using compressed air.
• Use a compressed air blow gun to blow dust and grit away from the tops of the ignition coils.
• This keeps debris from falling into the spark plug wells when the coils are removed.

Step 3: Unplug the Ignition Coil Connector

• Choose the coil you are replacing.
• Use your thumb to press the electrical connector lock tab.
• If the tab is stiff, use a small flathead screwdriver to gently depress the lock while pulling the connector straight back.
• Do not pry hard on the connector; the plastic can break with age and heat.
• Wiggle gently, do not yank.

Step 4: Remove the Ignition Coil Bolt

• Use a 10mm socket, 6-inch extension, and 3/8-inch ratchet to remove the ignition coil retaining bolt.
• Place the bolt in a small safe spot so it does not fall into the engine bay.

Step 5: Remove the Old Ignition Coil

• Grip the ignition coil body by hand.
• Twist it slightly left and right to break the rubber boot loose from the spark plug.
• Pull the coil straight upward and out of the spark plug well.
• Inspect the old coil boot for oil, coolant, cracking, burning, or carbon tracking. Carbon tracking looks like thin black lightning marks.
• If oil is inside the spark plug well, the valve cover tube seal may be leaking and should be repaired before installing new coils.

Step 6: Prepare the New Ignition Coil

• Compare the new ignition coil to the old one. The length, connector shape, bolt tab, and rubber boot should match.
• Apply a very small amount of dielectric grease inside the lower rubber boot opening.
• Dielectric grease is a non-conductive silicone grease that helps the rubber boot seal and release later.
• Do not fill the boot with grease; too much can cause poor connection.

Step 7: Install the New Ignition Coil

• Slide the new ignition coil straight down into the spark plug well by hand.
• Push firmly until you feel the boot seat onto the spark plug.
• Align the coil mounting tab with the bolt hole.
• Start the retaining bolt by hand first to prevent cross-threading.

Step 8: Tighten the Ignition Coil Bolt

• Use a 10mm socket, 6-inch extension, and 3/8-inch torque wrench to tighten the ignition coil bolt.
• Torque to 9.8 Nm (7.2 ft-lbs).
• Do not overtighten. The bolt threads into aluminum, which can strip if forced.

Step 9: Reconnect the Electrical Connector

• Push the electrical connector straight onto the ignition coil until it clicks.
• Lightly tug the connector body by hand to confirm it is locked.
• Repeat Steps 3-9 for any additional ignition coils you are replacing.

Step 10: Reinstall the Engine Cover

• Line up the engine cover with the rubber mounting grommets.
• Press down by hand until the cover seats securely.
• If any trim clips were removed, reinstall them by hand or with the trim clip removal tool used carefully as a pusher.

Step 11: Reconnect the Battery

• Reconnect the negative battery cable.
• Use a 10mm socket and 3/8-inch ratchet to tighten the terminal snugly.
• Do not overtighten the battery terminal clamp.

Step 12: Clear Codes and Start the Engine

• Use an OBD2 scan tool to clear stored misfire codes if the check engine light was on.
• Start the engine and let it idle for 2-3 minutes.
• Listen for smooth idle and watch for the check engine light returning.

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✅ After Repair

• ✅ Test drive your CR-V for 10-15 minutes with gentle acceleration first, then moderate acceleration.
• ✅ If the engine runs smoothly and the check engine light stays off, the repair is complete.
• ✅ If the same cylinder misfire returns, inspect the spark plug, injector, wiring, and compression for that cylinder.
• ✅ If the misfire moves after swapping coils between cylinders, the coil is confirmed faulty.
• ✅ After battery disconnection, the auto-up window function may need relearning: fully close the driver window and hold the switch up for about 2 seconds.
• ✅ Idle may feel slightly different for a short time while the engine computer relearns.

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💰 DIY vs Shop Cost

Shop Cost: $180-$650 (parts + labor)

DIY Cost: $45-$320 (parts only)

You Save: $135-$330 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.

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