🔧 Camry - Ignition Coil Replacement

You’ll be removing the plastic engine cover, unplugging each ignition coil, and swapping it for a new one. On your V6, the front three coils are easy; the rear three require lifting the upper intake manifold for access.

Difficulty Level: Intermediate | Estimated Time: 2–3 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a completely cool engine to avoid burns.
• ⚠️ Disconnect the negative battery terminal before touching ignition parts to prevent short circuits.
• ⚠️ Keep metal tools away from the battery positive terminal to avoid sparks.
• ⚠️ When the intake manifold is off, do not drop anything into the intake ports.
• ⚠️ Never pull coils by the wiring; always pull on the coil body.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🧰 10mm socket
• 🧰 12mm socket
• 🧰 14mm socket
• 🧰 1/4" drive ratchet
• 🧰 3/8" drive ratchet
• 🧰 3" socket extension
• 🧰 6" socket extension
• 🧰 Torque wrench (inch-lb, 50–200 in-lb range)
• 🧰 Torque wrench (ft-lb, 10–50 ft-lb range)
• 🧰 Flat trim tool or flathead screwdriver (small)
• 🧰 Needle-nose pliers
• 🧰 Magnetic pickup tool
• 🧰 Fender cover or clean towel
• 🧰 Shop rags
• 🧰 Safety glasses
• 🧰 Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Ignition coil set (V6, all 6 cylinders) - Qty: 6
• 🔩 Upper intake manifold gasket set - Qty: 1
• 🔩 Throttle body gasket - Qty: 1
• 🔩 Dielectric grease for ignition components - Qty: 1 small tube
• 🔩 Shop towels - Qty: 1 pack
• 🔩 Masking tape and marker (for labeling connectors) - Qty: 1

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📋 Before You Begin

• Park the Camry on level ground, shift to Park, and set the parking brake.
• Open the hood and use the hood prop securely.
• Disconnect the negative battery terminal using a 10mm socket and move the cable aside.
• Clear the area around the engine so you don’t knock tools or parts into the engine bay.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove engine cover

• Put on safety glasses and mechanic gloves.
• Lift the front edge of the plastic engine cover by hand; it is held by rubber grommets.
• Gently pull upward until the cover pops off, then set it aside.

Step 2: Identify front and rear cylinder banks

• The three coils closest to the radiator are the front bank (Bank 2).
• The three coils near the firewall (back of engine bay) are the rear bank (Bank 1) and will require intake manifold removal to access.
• Use masking tape and marker to label coil connectors if you want extra clarity.

Step 3: Replace front bank ignition coils (easy side)

• Working on one coil at a time, press the small plastic tab on the coil connector by hand; if tight, use a flathead screwdriver very gently to help lift the tab. An ignition coil is the small unit on top of each spark plug with a plug on it.
• Pull the connector straight off the coil body; do not pull on the wires.
• Use a 10mm socket with 1/4" ratchet to remove the single bolt holding the coil.
• Twist the coil gently and pull it straight up to remove.
• Apply a tiny smear of dielectric grease inside the new coil boot opening. Use very small amount only.
• Install the new coil straight down onto the spark plug until fully seated.
• Install the coil bolt by hand, then tighten with the 10mm socket and torque wrench to 9 Nm (80 in-lb, about 7 ft-lb).
• Reconnect the electrical connector until it clicks.
• Repeat this process for the remaining two front-bank coils.

Step 4: Prepare to remove upper intake manifold for rear coils

• Place a fender cover or towel over the front bumper to protect paint.
• Take a picture of the top of the engine and intake area with your phone for reference later. Photos help with reassembly.
• Label any vacuum hoses or electrical connectors you will unplug using masking tape and marker.

Step 5: Disconnect hoses and connectors from upper intake manifold

• Unplug the electrical connector on the throttle body using your fingers or a flathead screwdriver gently on the lock tab.
• Disconnect any visible small vacuum hoses attached to the manifold by hand; if tight, use needle-nose pliers carefully.
• Move any wiring harness clips from the manifold using a flat trim tool so the harness can flex away.

Step 6: Remove throttle body from intake (leave coolant lines attached)

• Use a 10mm socket with 1/4" ratchet to remove the four bolts holding the throttle body to the upper intake manifold.
• Carefully pull the throttle body slightly away and rest it to the side on a shop rag without kinking any hoses.
• Keep the opening covered with a shop rag to prevent debris entering.

Step 7: Remove upper intake manifold

• Use a 12mm socket with 3/8" ratchet and appropriate extensions to remove the manifold mounting bolts and any support bracket bolts at the rear.
• Keep track of all bolts; place them in a small tray or on a magnet.
• Once all bolts are out, gently lift the manifold straight up. If it feels stuck, wiggle slightly—do not force or pry hard.
• Immediately place clean shop rags into each exposed lower intake port in the engine to block anything from falling in. Count rags so none stay inside.

Step 8: Replace rear bank ignition coils

• Now you can see the three rear coils along the back bank.
• As with the front, work one coil at a time.
• Press the connector tab and unplug the connector by hand.
• Use a 10mm socket with 1/4" ratchet to remove the coil bolt.
• Twist and pull the coil straight up.
• Apply a tiny bit of dielectric grease inside the new coil boot.
• Install the new coil onto the spark plug and push down until seated.
• Install the 10mm bolt and tighten with the torque wrench to 9 Nm (80 in-lb, about 7 ft-lb).
• Reconnect the coil connector until it clicks.
• Repeat for the remaining two rear-bank coils.

Step 9: Install new intake manifold gaskets

• Remove the old upper intake manifold gaskets from the manifold using your fingers or a flathead screwdriver gently if they are stuck.
• Wipe the gasket surfaces on the manifold and engine side lightly with a shop rag; do not scratch them.
• Install the new upper intake manifold gaskets in the same positions as the old ones. They should sit flat and secure.
• Remove the shop rags from the intake ports and count them to be sure none are left inside.

Step 10: Reinstall upper intake manifold

• Carefully lower the manifold onto the engine, making sure it aligns with the bolt holes and gaskets stay in place.
• Install all manifold bolts finger-tight using a 12mm socket and 3/8" ratchet.
• Then use a torque wrench with 12mm socket to tighten the manifold bolts in a crisscross pattern to 25 Nm (18 ft-lb).
• Reinstall any rear support bracket bolts using a 12mm socket and tighten to 25 Nm (18 ft-lb).

Step 11: Reinstall throttle body and hoses

• Remove the old throttle body gasket from the manifold and install the new gasket in its place.
• Position the throttle body back onto the manifold.
• Install the four throttle body bolts finger-tight using a 10mm socket.
• Torque the throttle body bolts evenly with a torque wrench and 10mm socket to 10 Nm (89 in-lb).
• Reconnect the electrical connector to the throttle body until it clicks.
• Reconnect all previously removed vacuum hoses and wiring clips by hand or with needle-nose pliers if needed.
• Double-check your earlier photo to confirm everything is back where it was.

Step 12: Reinstall engine cover and reconnect battery

• Place the engine cover back over the top of the engine, aligning the cover pegs with the rubber grommets, then push down by hand until it clicks in.
• Reconnect the negative battery cable using a 10mm socket and tighten to 5 Nm (44 in-lb)—snug, not overly tight.

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✅ After Repair

• Start the engine and let it idle. It should run smoothly without misfires or shaking.
• Watch the dashboard for any check engine light. If it was on before, it may clear after a few drive cycles; if it stays on, a scan tool can read and clear codes.
• Listen for any hissing sounds around the intake area that could indicate a vacuum leak.
• Take a short, gentle test drive: check for smooth acceleration and no hesitation.
• After the drive, recheck around the throttle body and manifold for anything loose.

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💰 DIY vs Shop Cost

Shop Cost: $600–$900 (parts + labor)

DIY Cost: $220–$450 (parts only)

You Save: $380–$450 by doing it yourself!

Shop labor rates vary but typically run $100–$150/hour. This repair takes a shop approximately 1.5–2.0 hours.

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