🔧 Malibu - Ignition Coil Replacement

Your Malibu uses coil-on-plug ignition coils (one coil per cylinder). Replacing a weak coil can fix misfires, rough idle, blinking check-engine light, and poor acceleration.

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 car while unplugging coils.
• ⚠️ If you’re unsure around electrical connectors, disconnect the negative battery cable first.
• ⚠️ Don’t pull on wiring—only pull on the connector body.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 3/8" ratchet
• 3" extension
• Torque wrench (in-lb)
• Flat trim tool
• Small pick tool
• Shop towels
• 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 replace as a set)
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool fully.
• If disconnecting the battery: use a 10mm socket to remove the negative cable and isolate it so it can’t spring back.
• Tip: Take a quick photo of connectors first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover (if equipped)

• Grip the cover with both hands and pull upward firmly to pop it off the rubber grommets.
• If your cover has fasteners instead: remove them with a 10mm socket, then lift the cover off.

Step 2: Locate the ignition coils

• The ignition coils are on top of the engine, one per cylinder, with an electrical connector on each.
• Use a shop towel to wipe away dirt around the coils so nothing falls into the spark plug tubes.

Step 3: Unplug the coil electrical connector

• Use a flat trim tool or small pick tool to release the connector lock (the small locking tab that prevents accidental unplugging).
• Press the release and pull the connector straight off the coil.

Step 4: Remove the ignition coil retaining bolt

• Use a 10mm socket with a 3" extension and 3/8" ratchet to remove the coil bolt.
• Set the bolt aside where it won’t get lost.

Step 5: Remove the ignition coil

• Twist the coil gently left/right to break the seal, then pull it straight up and out.
• If it’s stuck, keep twisting—don’t pry hard against the valve cover.

Step 6: Prep and install the new coil

• Apply a very thin smear of dielectric grease inside the rubber boot of the new coil. (Dielectric grease is a non-conductive grease that helps prevent moisture and makes future removal easier.)
• Push the coil straight down onto the spark plug until you feel it seat fully.

Step 7: Reinstall the coil bolt and torque it

• Start the bolt by hand to avoid cross-threading.
• Tighten with a 10mm socket.
• Final tighten using a torque wrench (in-lb): Torque to 89 in-lb (10 Nm)

Step 8: Reconnect the coil connector

• Push the connector on until it clicks.
• Re-engage the connector lock you released earlier.

Step 9: Repeat for remaining coils (if replacing more than one)

• Do one coil at a time so connectors don’t get mixed up.

Step 10: Reinstall the engine cover

• Align the cover with the mounting points and press down firmly to snap it into place.
• If your cover uses fasteners, tighten them with a 10mm socket (snug only).

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✅ After Repair

• If you disconnected the battery, reconnect it using a 10mm socket (snug).
• Start the engine and let it idle for 1-2 minutes. It should run smooth with no shaking.
• Test drive for 10 minutes and confirm no flashing check-engine light.
• If the check-engine light stays on, it may need to be cleared with a scan tool (or it may clear after a few drive cycles if the issue is fixed).
• Tip: A blinking check-engine light means misfire now.

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💰 DIY vs Shop Cost

Shop Cost: $180-$500 (parts + labor)

DIY Cost: $40-$260 (parts only)

You Save: $140-$240 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.