🔧 HR-V - Ignition Coil Replacement

Your HR-V uses one ignition coil per cylinder (4 total). Replacing a bad coil restores smooth running, fixes misfires, and can clear a flashing check-engine light caused by a misfire.

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

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⚠️ Safety & Precautions

• 🛑 Work on a cool engine to avoid burns.
• 🛑 Turn ignition OFF and keep the key/fob away from the vehicle.
• 🛑 Disconnect the negative battery terminal if you’ll be unplugging connectors for a while or working around metal tools. Use a memory saver only if you already have one.
• 🛑 If the check-engine light was flashing, avoid driving until the misfire is fixed (can damage the catalytic converter).

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 6" socket extension
• Torque wrench (5–30 Nm range)
• Small flathead screwdriver
• Nitrile gloves
• Safety glasses

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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

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Open the hood and let the engine cool fully.
• If disconnecting the battery: use a 10mm socket to remove the negative terminal and isolate it so it can’t spring back. Wait 2 minutes before unplugging engine connectors.
• Dielectric grease helps prevent moisture corrosion.
• A torque wrench tightens bolts to spec.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the ignition coils

• Locate the 4 ignition coils on top of the engine valve cover (one per cylinder).
• If any plastic cover or ducting blocks access, remove the clips/bolts using a small flathead screwdriver and a 10mm socket.

Step 2: Unplug the coil electrical connector

• Press the connector locking tab, then pull the connector straight off the coil.
• If it’s stuck, gently help the tab with a small flathead screwdriver (do not pry hard on the wires).

Step 3: Remove the coil hold-down bolt

• Use a 10mm socket, 6" socket extension, and 1/4" drive ratchet to remove the coil hold-down bolt.
• Set the bolt aside where it can’t fall into the engine bay.

Step 4: Remove the ignition coil

• Twist the coil slightly to break the seal, then pull it straight up.
• If the rubber boot stays stuck in the spark plug tube, pull it out carefully by hand and reinstall it onto the coil.

Step 5: Install the new ignition coil

• Apply a very small smear of dielectric grease inside the rubber boot (a thin film only).
• Push the coil straight down until it fully seats on the spark plug.
• Reinstall the hold-down bolt by hand first to avoid cross-threading.
• Tighten the hold-down bolt with a torque wrench (5–30 Nm range): Torque to 12 Nm (9 ft-lbs).

Step 6: Reconnect the coil connector

• Push the electrical connector onto the coil until it clicks.
• Repeat Steps 2–6 for any other coils you’re replacing.

Step 7: Reassemble anything removed

• Reinstall any covers/ducting you removed using the 10mm socket and 1/4" drive ratchet.
• If you disconnected the battery, reconnect it with the 10mm socket and snug it (do not overtighten).

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✅ 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 the stored code and verify the misfire is gone.
• Test drive 10–15 minutes and recheck for any roughness or warning lights.
• If misfire remains, check spark plugs next.

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💰 DIY vs Shop Cost

Shop Cost: $220-$550 (parts + labor)

DIY Cost: $60-$320 (parts only)

You Save: $160-$230 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.6-1.0 hours.

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🎯 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.