2008 Toyota Sienna Ignition Coil Diagram

If you’re looking for a 2008 Toyota Sienna ignition coil diagram, you’re in luck. I’ve got one right here. Just follow the link and you’ll be taken to the page where you can download it.

The ignition coil is a vital part of your car’s engine, and it’s important to keep it in good working order. If you’re having trouble with your car’s ignition system, or if your engine is misfiring, it could be due to a problem with the ignition coil.

If you’re looking for a 2008 Toyota Sienna ignition coil diagram, you’ve come to the right place. Here at OnlineToyotaParts.com, we carry a wide selection of Toyota parts and accessories, including ignition coils for your Sienna. Ignition coils are an essential part of your vehicle’s ignition system, and they play a vital role in starting your engine.

If one of your ignition coils is malfunctioning, it can cause your engine to misfire or fail to start altogether. That’s why it’s important to keep them in good working condition. If you need to replace one or more of your Sienna’s ignition coils, our diagrams can help you locate the right parts for the job.

We also offer a wide variety of other Toyota parts and accessories, so be sure to browse our selection before checkout.

How Do You Change the Ignition Coil on a 2008 Toyota Sienna?

Assuming you need to replace the ignition coil on your 2008 Toyota Sienna, here are the steps: 1. Disconnect the negative battery terminal to prevent any electrical shorts. 2. Locate the ignition coils.

On the 2008 Toyota Sienna, there are three ignition coils located on the top of the engine near the front. They are usually easy to spot because they have spark plug wires attached to them. 3. Remove the spark plug wires from the ignition coils by gently pulling on them until they come off.

It is helpful to label each wire so you can put them back in the correct order later. 4. Unscrew and remove the bolts that hold each ignition coil in place using a socket wrench or ratchet. Be careful not to drop any of the bolts into engine as they can be difficult to retrieve.

5. Pull out each old ignition coil and replace it with a new one, hand-tightening each bolt until snug before moving on to next bolt (do not overtighten).

Where are the Ignition Coils Located?

The ignition coils in most cars are located under the hood, close to the engine. On some models, however, they may be located elsewhere, such as in the trunk. If you’re unsure where your car’s ignition coils are located, consult your owner’s manual or a repair manual for your specific model.

What are the Symptoms of a Failing Ignition Coil?

If your car has a failing ignition coil, you may experience any of the following symptoms: 1. Your car will have a hard time starting. This is because the ignition coil is responsible for providing the spark that ignites the air/fuel mixture in the engine.

If it’s not working properly, then there won’t be enough spark to start the engine. 2. You may notice that your car’s engine is misfiring. This can happen if one or more of the cylinders isn’t getting enough spark from the ignition coil.

As a result, the air/fuel mixture in that cylinder won’t ignite correctly and you’ll feel a jerking sensation as the engine tries to fire on all cylinders. 3. Your car’s fuel economy may suffer as a result of a failing ignition coil. This is because an inefficient combustion process will cause your car to use more fuel than necessary.

4. You may notice that your car’s check engine light is illuminated on the dash board. This can be caused by a number of different things, but it could indicate that there is an issue with the ignition coil circuit.

How Do You Check Which Ignition Coil is Not Working?

If your car has an ignition coil problem, it will usually display one or more of the following symptoms: 1. The engine will misfire. This can happen for a number of reasons, but if you have an ignition coil problem, it’s most likely because spark is not being delivered to the cylinders correctly.

2. You may notice a decrease in fuel efficiency. Ignition coils that are failing will often cause the engine to run less efficiently, resulting in poorer gas mileage. 3. The engine may run rough or stall entirely.

If the ignition coils are not working properly, the engine may not be able to maintain its idle speed or may stall altogether. 4. You may see an increase in exhaust emissions. A failing ignition coil can cause increased levels of unburned hydrocarbons and other pollutants in the exhaust system.

5. The check engine light may come on.

2008 Toyota Sienna Ignition Coil Diagram

Credit: my.prostreetonline.com

2008 Sienna Ignition Coil

In a vehicle, the ignition coil is responsible for providing spark to the spark plugs. A problem with the ignition coil can cause engine misfires, stalling and other issues. The 2008 Sienna has been known to have problems with its ignition coils, and as such, it is important to be aware of the signs that may indicate a problem.

One of the most common symptoms of a failing ignition coil is engine misfires. If you notice that your engine is misfiring, or running rough, it’s important to have it checked out as soon as possible. Other symptoms can include decreased fuel economy, loss of power while accelerating and even stalling.

If you suspect that your Sienna’s ignition coil may be failing, it’s important to have it checked out by a qualified mechanic as soon as possible. Ignition coils are not inexpensive parts, but replacing them is much less expensive than paying for repairs caused by engine damage from a failed coil.


If your 2008 Toyota Sienna is misfiring, it’s likely that the ignition coil is to blame. This helpful diagram shows exactly where the ignition coil is located and how to replace it. With this information, you can have your Sienna back on the road in no time!

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Robert is a lifelong enthusiast of all things automotive. He has been working with wiring diagrams and schematics since he was in high school, and continues to use them as the foundation for his knowledge today.

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