Do Lexus cars have spark plugs?

Yes, Lexus cars do have spark plugs. Spark plugs are an essential component in the internal combustion engines found in Lexus vehicles, just as they are in most other gasoline-powered cars.

What Are Spark Plugs and What Do They Do?

Spark plugs are small electrical devices that are screwed into the cylinder heads of an engine. Their primary function is to provide the timed electrical spark that ignites the air-fuel mixture inside each engine cylinder, which in turn powers the engine. Without functioning spark plugs, a gasoline engine simply cannot run.

Spark Plugs in Lexus Vehicles

Like other automakers, Lexus designs its engines to use spark plugs as part of the ignition system. The specific spark plugs used can vary depending on the Lexus model and engine type, but they serve the same essential purpose of providing the timed electrical spark to ignite the fuel.

Lexus recommends that spark plugs be inspected and replaced at regular intervals as part of routine maintenance, typically every 60,000 to 100,000 miles depending on the vehicle. Worn or fouled spark plugs can lead to misfiring, reduced fuel efficiency, and other performance issues, so it's important to keep them in good condition.

Spark Plug Replacement in Lexus Cars

Replacing the spark plugs in a Lexus is generally a straightforward maintenance task that can be performed by a qualified mechanic or even by the vehicle owner in some cases. The process involves accessing the spark plugs, removing the old ones, and installing new plugs that meet the manufacturer's specifications.

It's important to use the correct spark plugs recommended by Lexus to ensure proper engine performance and avoid any potential issues. Attempting to use the wrong type of spark plug can cause problems and potentially damage the engine.

In summary, yes, Lexus cars do have spark plugs as a critical component of their ignition systems. Proper maintenance and replacement of these plugs is essential for keeping a Lexus running at its best.

How much does it cost to replace spark plugs in a Lexus?

The cost to replace Lexus spark plugs can range from $400 to over $1,100, with an average around $400 to $700 at an independent shop. A major factor is how accessible the spark plugs are—some Lexus models, like certain IS and ES sedans, have spark plugs buried under components that add significant labor time and cost, potentially pushing the total well over $1,000. 
This video explains how to save money by replacing spark plugs yourself: 1mScrew This!YouTube · Sep 6, 2023
Cost breakdown

• Parts: 6 to 8 spark plugs, which can cost around $10 to $25 each depending on the material (e.g., iridium or platinum), plus any necessary gaskets or other parts. 
• Labor: The price is highly variable, depending on how long it takes to access the plugs. It can be as low as a few hours or several, pushing the cost up significantly for models with more complex engine designs. 
• Dealer vs. independent shop: Dealerships typically charge more, while independent shops can offer more competitive rates. You may find an independent shop willing to do the work for $100-$200 in labor if the spark plugs are easy to access. 
• Other factors: The final price will also depend on your location and the specific parts (like OEM vs. aftermarket) used. If the mechanic recommends replacing other parts, like coils, at the same time, this will also increase the total cost. 

How to change Lexus spark plugs?

Replacing Lexus spark plugs involves safety precautions like letting the engine cool, disconnecting the battery, and carefully removing engine covers, coil packs, and spark plugs to install the new ones. The process is more involved for rear spark plugs, often requiring removal of the intake manifold or cowl to access them. After installing new plugs and torquing them correctly, reassemble all parts in reverse order, ensuring all connections are secure.
 
1. Preparation and safety

• Park the vehicle on a flat, dry surface and allow the engine to cool completely.
• Disconnect the negative terminal of the battery.
• Clean the area around the engine to prevent dirt from falling into the cylinders when the plugs are removed. 

2. Accessing and replacing the front spark plugs

• Remove any engine covers to access the front spark plugs. 
• Disconnect the electrical connector from the ignition coil (or "coil on plug" unit). 
• Unbolt and remove the ignition coil. 
• Use a 5/8 inch spark plug socket to unscrew and remove the old spark plug. 
• Hand-thread the new spark plug in to avoid cross-threading, then tighten with a torque wrench to the manufacturer's specification (around 13-15 ft-lbs). 
• Apply dielectric grease to the inside of the ignition coil boot, reinstall the coil, and reconnect the electrical connector. 
• Repeat for all front plugs. 

3. Accessing and replacing the rear spark plugs

• The rear plugs are more difficult to reach and may require removing other components, such as the cowl or the intake manifold.
• Carefully remove the necessary parts, keeping track of all bolts and connectors.
• Once you have access, replace the rear spark plugs using the same method as the front ones.
• Reinstall the removed components in the reverse order of removal, ensuring all gaskets are in place and all connections are secure. 

4. Final steps

• Reconnect the negative battery terminal.
• Start the engine to ensure it runs smoothly. 

What cars do not have spark plugs?

diesel engines
There are no spark plugs in diesel engines, highlighting a significant variation between gasoline and diesel engines. The first difference that comes to mind with a diesel is the fuel. Where gasoline can ignite in its current state, diesel must first become atomized for ignition.

Does Lexus have spark plugs?

Lexus, a name often associated with luxury and exceptional automotive engineering, requires meticulous attention to ensure its performance remains uncompromised. One of the pivotal components that demand regular inspection and timely replacement is the spark plug.