This procedure covers the removal and replacement of a single ignition coil on the 2012-2017 Toyota Camry 2.5L I4 engine, including access to the coil and spark plug inspection.

Warnings

Tools required

Parts

• Ignition coil × 1 — 90919-02260 or equivalent
• Spark plug (if replacement needed) × 1 — 90919-01253 (Denso) or equivalent

Preparation

1. Ensure engine is completely cool to the touch
2. Disconnect negative battery terminal and wait 3 minutes to allow residual voltage to dissipate
3. Identify which cylinder requires coil replacement (cylinders numbered 1-4 from timing belt end to firewall)

Procedure

1. 1

   Access the ignition coil
   The ignition coils are mounted directly on top of the valve cover. Remove the plastic engine cover if equipped by pulling upward on the cover to release the retaining clips. Set aside.
2. 2

   Disconnect electrical connector
   Locate the electrical connector on top of the ignition coil. Press down on the release tab while pulling the connector straight up and away from the coil. Do not pull on the wiring harness.
3. 3

   Remove ignition coil bolt
   Using a 10mm socket and extension, remove the single bolt securing the ignition coil to the valve cover. Store the bolt in a safe location.
   Torque spec

   Ignition Coil Bolts8 Nm (6 lb-ft)
4. 4

   Extract the ignition coil
   Grasp the ignition coil firmly and pull straight upward with steady pressure. The coil may require slight twisting motion to break the seal with the spark plug boot. Once free, remove the coil from the spark plug well.
   ⚠If excessive force is required, stop and verify the bolt has been completely removed to avoid breaking the coil
5. 5

   Inspect spark plug well
   Inspect the spark plug well for any oil, coolant, or debris. If oil is present, valve cover gasket replacement may be necessary. Use compressed air or a clean cloth to remove any debris from around the spark plug before proceeding.
6. 6

   Inspect spark plug (optional)
   If spark plug inspection or replacement is desired, use a 16mm spark plug socket to remove the spark plug. Inspect electrode wear and gap. If replacing the spark plug, apply a small amount of anti-seize compound to the threads before installation.
   ⚠Do not over-torque spark plugs in aluminum heads as this can strip threads and require costly head repair
   Torque spec

   Spark Plugs - Aluminum Head20 Nm (15 lb-ft)
7. 7

   Prepare new ignition coil
   Remove the new ignition coil from packaging. Inspect the rubber boot at the bottom of the coil for any damage. Apply a thin coat of dielectric grease to the inside of the spark plug boot to ensure proper seal and ease future removal.
8. 8

   Install new ignition coil
   Carefully align the new ignition coil with the spark plug well and insert it straight down. Apply gentle pressure while rotating slightly to ensure the boot fully seats onto the spark plug terminal. The coil should sit flush with the valve cover mounting surface.
   ⚠Ensure the coil boot is fully seated on the spark plug to prevent misfires and arcing
9. 9

   Install coil mounting bolt
   Insert the 10mm mounting bolt through the ignition coil bracket and thread it into the valve cover by hand. Once hand-tight, use a torque wrench to tighten to specification.
   Torque spec

   Ignition Coil Bolts8 Nm (6 lb-ft)
10. 10

    Reconnect electrical connector
    Push the electrical connector firmly onto the top of the ignition coil until you hear or feel a distinct click indicating it is fully seated. Gently tug on the connector to verify it is locked in place.
11. 11

    Reinstall engine cover
    If an engine cover was removed, align the mounting clips with their receptacles on the engine and press down firmly until all clips are fully seated.
12. 12

    Reconnect battery
    Reconnect the negative battery terminal. The vehicle may require a brief drive cycle for the engine computer to relearn idle and fuel trim parameters.

Reassembly

1. Ensure all electrical connectors are fully seated and locked
2. Verify ignition coil mounting bolt is torqued to specification
3. Confirm engine cover is properly installed if equipped

Verification

• Start the engine and verify it runs smoothly without misfires or rough idle
• Check for any Check Engine Light illumination; clear codes if previous misfire codes were stored
• Listen for any arcing sounds that might indicate improper coil seating
• Perform a test drive and verify normal engine performance under acceleration

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