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How to Replace the Ignition Coil in Toyota Cars

by Contributing Writer; Updated June 12, 2017

The ignition coil, which converts low-voltage power from the battery into high-voltage power to trigger the spark plugs, works as the heart of the ignition system. If you have a damaged Toyota car ignition coil, you may not be able to start your vehicle. Other symptoms include oil leaks, irregular or fast idle or stalling when you stop or slow down.

Under The Hood:

 How to Replace the Ignition Coil in a Toyota Corolla

Isolate the negative battery cable to prevent injuries or accidents. You'll need to remove the ground cable from the negative battery terminal post in order to do this.

Loosen and detach the nuts and the clips that secure the cylinder head cover to the cylinder head. The only tool you should need for this is a wrench or a socket set.

Determine whether you need to replace a single ignition coil or all the ignition coils. Each coil connects to a cylinder head and is held in place by a connector.

Remove the connector from the Corolla ignition coil. If you need to remove all of the ignition coils, you should remove a total of four connectors.

Pull up and twist on the ignition coil to free it from the cylinder head.

Verify that the new ignition coil works with your type of engine; universal and stock replacement ignition coils work with select models. Install the new Corolla ignition coil.

Secure the parts in place and reconnect the battery.

Items you will need

  • Wrench or socket set

  • Corolla ignition coil(s)

 How to Replace the Ignition Coil in a Toyota Tundra

Detach the ground battery cable from the battery. To do this, remove the cable that attaches to the negative battery terminal post. For additional safety, set your emergency or parking brake.

Lift the hood and locate the ignition coil. You should find this near the intake manifold. On some models, you may need to remove air cleaner hose and detach the high-tension cables.

Use a ratchet and socket set or a small wrench to disconnect the retainers that secure the ignition coil.

Remove the damaged ignition coil. You should be able to pull on it. If you have trouble getting the seal to break, slightly twist the ignition coil as you pull.

Position the new Tundra ignition coil and press it in place. You may want to glide the boot of the ignition coil onto the cylinder head to prevent a tear in the boot.

Tighten the connectors, replace any other components you removed and reconnect the battery. If you have a torque wrench, tighten the mounting bolts to 84 inch pounds (10 Nm).

Items you will need

  • Ratchet and socket set or wrench

  • Tundra ignition coil

  • Torque wrench, optional

 How to Replace the Ignition Coil in a Toyota Tacoma

Disconnect the negative battery cable, also called the ground cable, from the negative battery terminal post for safety. For extra precaution, set your emergency or parking brake.

Locate the ignition coil, which should be near the intake manifold. You may need to remove the cylinder head cover in order to expose the ignition coil.

Use a ratchet and socket set to remove the connectors that secure the Tacoma ignition coil in place.

Free the ignition coil by pulling up. You may need to twist slightly or grip the ignition coil boot and pull to release the seal formed between the ignition coil and the cylinder head.

Insert your new Tacoma ignition coil. Make sure you get a good connection, or your vehicle may not start.

Secure the ignition coil in place.

Reassemble any components that you removed to access the ignition coil.

Items you will need

  • Ratchet and socket set

  • Tacoma ignition coil

 How to Replace the Ignition Coil in a Toyota Camry

Disconnect your battery by removing the ground cable wire from the terminal. For additional safety, set your emergency brake.

Use a wrench or a socket to loosen the two nuts and clips on the cylinder head cover. This exposes the Camry ignition coil.

Remove the ignition coil connectors. You should find four of these.

Pull up on the ignition coil to dislodge it from the cylinder head. You may want to twist slightly to help break the seal between the cylinder head and the ignition coil.

Install the new Camry ignition coil. You can use a stock replacement or a universal ignition coil. Be sure the ignition coil works with your type of engine--there's a variety of universal ignition coils on the market.

Tighten the connectors, nuts and clips in place.

Reconnect the battery.

Items you will need

  • Wrench or socket set

  • Camry ignition coil

About the Author

This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more about It Still Runs, contact us.

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