🔧 Juke - Ignition Coil Replacement

Ignition coils sit on top of the spark plugs and create the high voltage needed for spark. Replacing a bad coil can fix misfires, rough idle, and flashing check-engine lights. This is a straightforward job, but take your time to avoid breaking electrical connectors.

Difficulty Level: Beginner | Estimated Time: 0.5-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a cool engine; hot parts can burn you.
• ⚠️ Keep the key out of the vehicle so it can’t be started.
• ⚠️ Disconnect the negative battery terminal if you’ll be unplugging multiple connectors (recommended).
• ⚠️ Do not pull on wiring; release connector locks first.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 6" extension (1/4" drive)
• Torque wrench (inch-pound or small Nm range)
• Flat trim tool
• Needle-nose pliers
• Pick tool
• Flashlight
• 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, shift to neutral, and set the parking brake.
• Open the hood and let the engine fully cool.
• If disconnecting the battery: use a 10mm socket to remove the negative terminal and tuck it aside so it can’t spring back.
• Take a quick photo of the coil connectors first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the top cover/ducting (as equipped)

• Use a flat trim tool to pop up any plastic clips holding the top duct/cover.
• Use a 10mm socket with a 1/4" drive ratchet to remove any small bolts if present.
• Lift the cover/ducting off and set it aside.
• If it resists, look for one missed clip.

Step 2: Locate the ignition coils

• Use a flashlight and find the coil “sticks” on top of the valve cover. Each coil has an electrical connector and one small hold-down bolt.

Step 3: Unplug the coil electrical connector

• Use a pick tool to gently lift/release the connector lock (the small plastic tab that prevents unplugging).
• Press the release and pull the connector straight off (do not yank the wires).
• Wiggle the plug; don’t pry hard.

Step 4: Remove the coil hold-down bolt

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

Step 5: Remove the ignition coil

• Grip the coil body, twist it gently left-right to break the seal, then pull straight up.
• If it’s stuck, use gentle rocking—do not lever against the valve cover.

Step 6: Install the new ignition coil

• Put a tiny smear of dielectric grease inside the rubber boot (it helps sealing and future removal).
• Push the coil straight down until it fully seats on the spark plug.
• Reinstall the hold-down bolt using a 10mm socket.
• Torque to 8.7 Nm (77 in-lbs)

Step 7: Reconnect the electrical connector

• Push the connector on until it clicks.
• If it has a secondary lock, re-engage it (use a pick tool if needed).

Step 8: Repeat for other coils (if replacing more than one)

• Repeat Steps 3–7 for each remaining coil.
• Replace in pairs or all four for best reliability.

Step 9: Reinstall the top cover/ducting

• Refit the cover/ducting.
• Use a 10mm socket to reinstall bolts (snug, do not over-tighten).
• Press plastic clips back in by hand.

Step 10: Reconnect the battery (if disconnected)

• Use a 10mm socket to tighten the negative terminal (snug).

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✅ After Repair

• Start your Juke and let it idle for 1-2 minutes.
• Listen/feel for a smooth idle and verify there’s no flashing check-engine light.
• If the check-engine light stays on, the stored code may need clearing after the repair.
• Take a short test drive and re-check for any misfire or hesitation.

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💰 DIY vs Shop Cost

Shop Cost: $250-$600 (parts + labor)

DIY Cost: $60-$400 (parts only, depending how many coils)

You Save: $150-$300+ by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.7-1.2 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.