🔧 Malibu - Ignition Coil Replacement

Your Malibu uses a coil-on-plug setup (one ignition coil per spark plug). Replacing a bad coil restores smooth running, fixes misfires, and can prevent catalytic converter damage from unburned fuel.

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

Assumption: 1.5L turbo (coil-on-plug) with 10mm coil hold-down bolts.

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⚠️ Safety & Precautions

• ⚠️ Work on a cool engine to avoid burns.
• ⚠️ Disconnect the negative battery cable to prevent accidental short circuits.
• ⚠️ Don’t pull on the wiring—only the connector body.
• ⚠️ Keep dirt out of the spark plug holes.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 3" socket extension (1/4")
• Trim clip tool
• Inch-pound torque wrench (0-200 in-lbs)
• Dielectric grease
• 10mm wrench
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 (or Qty: 4 if replacing all)
• Ignition coil boot (if damaged) - Qty: 1 (or Qty: 4)
• Spark plug set (recommended if due) - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground, shift to Park, and set the parking brake.
• 🔑 Turn the ignition OFF and keep the key/fob away from the car.
• 🔋 Use a 10mm wrench to disconnect the negative battery cable and move it aside so it can’t spring back.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover

• Put on safety glasses and nitrile gloves.
• Grip the plastic engine cover and pull upward firmly to release the rubber grommets.
• If any push-clips are in your way, lift them with a trim clip tool.

Step 2: Unplug the ignition coil electrical connector

• Locate the coil you’re replacing on top of the engine.
• Release the connector lock (often a small “CPA” lock; a CPA is a safety clip that prevents unplugging).
• Press the tab and pull the connector straight off (do not yank the wires).

Step 3: Remove the ignition coil hold-down bolt

• Use a 10mm socket, 1/4" ratchet, and 3" extension to remove the coil bolt.
• Set the bolt aside (you typically reuse it).

Step 4: Remove the coil from the spark plug

• Twist the coil slightly left-right to break the seal, then pull straight up.
• Look down the spark plug tube for oil or water. If you see fluid, stop and clean/dry it before reassembly.
• Tip: A gentle twist helps it release.

Step 5: Install the new ignition coil

• Put a tiny smear of dielectric grease inside the rubber boot (this helps prevent sticking and moisture).
• Push the coil straight down onto the spark plug until fully seated.
• Install the hold-down bolt by hand first to avoid cross-threading.
• Use an inch-pound torque wrench with a 10mm socket to tighten the bolt: Torque to 80 in-lbs (9 Nm).

Step 6: Reconnect the electrical connector

• Push the connector on until it clicks.
• Reinstall the CPA/lock if your connector has one.

Step 7: Reinstall the engine cover and reconnect the battery

• Press the engine cover back onto its grommets until it snaps in place.
• Reconnect the negative battery cable using a 10mm wrench and tighten snugly.

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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 was on, the code may clear after a few drive cycles; you can also clear it with a scan tool.
• ✅ Test drive gently and verify no flashing check engine light (a flashing light means active misfire—stop driving).

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💰 DIY vs Shop Cost

Shop Cost: $180-$450 (parts + labor, depends on how many coils)

DIY Cost: $45-$300 (parts only, depends on 1 coil vs all 4)

You Save: $135-$150+ 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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🎯 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.