Spark Plugs

What Are Spark Plugs?

The spark plugs create a spark by providing an electrical current between two electrodes, the spark then ignites the fuel in your engine. When purchasing spark plugs, it's important to consider factors such as your type of engine, the type of driving you undertake and the specific requirements of your vehicle.

For example, high performance spark plugs are designed to provide a hotter spark, which helps to improve engine performance and fuel efficiency. By choosing the correct spark plugs for your engine, you can ensure maximum engine performance, improve fuel efficiency and help to extend the life of your engine.

Browse our selection of spark plugs today to find the perfect fit for your vehicle, please enter your registration number onto our website for a list of specific parts matched to your vehicle.

Please do not hesitate to telephone or email our friendly parts team for help in ensuring you purchase the correct parts for your vehicle. Whether you’re after Bosch spark plugs, NGK spark plugs or Denso spark plugs, we’ll have the perfect product for your vehicle!

Please do not hesitate to telephone or email our friendly parts team for help in ensuring you purchase the correct parts for your vehicle.

Frequently Asked Questions - FAQs

Q: What Do Spark Plugs Do?

A: Spark plugs are devices that are used to create a spark in order to ignite the air-fuel mixture in an internal combustion engine. They are the source of the spark which allows the fuel to be burnt and converted into power.

Q: How Often Should Spark Plugs Be Changed?

A: Spark plugs should be changed every 30,000 to 50,000 miles or as recommended in the owners’ manual for your vehicle.

Q: How Do I Know When I Need New Spark Plugs?

A: Some of the signs that you need new spark plugs are engine misfires, slow acceleration, poor fuel economy, and trouble starting your engine.

Where are Spark Plugs Located?

Spark plugs are located in the cylinder head of an internal combustion engine. They are positioned at the top of each cylinder and screwed into the engine block, where they ignite the air-fuel mixture by creating a spark.

Which Spark Plugs Do I Need for My Car?

To determine which spark plugs you need for your car, consult your vehicle's owner’s manual, which specifies the correct type and size. Alternatively, enter your registration into the banner at the top of the page to find the appropriate spark plug for your vehicle!

Do Diesel Cars Have Spark Plugs?

No, diesel cars do not require spark plugs, but instead use glow plugs. Diesel cars don’t use spark plugs because of the way the combustion system works in the engine. Glow plugs preheat the cylinders in a diesel engine before fuel compression, ensuring that the energy from the fuel is used for movement rather than just heating the cylinders. You can view our glow plug product range here!

How Do I Clean Spark Plugs?

To clean spark plugs, first, ensure the engine is cool and wear safety gloves. Remove the spark plugs using a socket wrench. Clean the plugs with a wire brush and carburettor cleaner, scrubbing off carbon deposits. Rinse with water and dry thoroughly with a cloth. Reinstall the spark plugs, ensuring they are tightened securely.

What Do Upgraded Spark Plugs Do?

Upgraded spark plugs enhance the performance of an engine by providing a more efficient and reliable spark, which improves fuel combustion. This can lead to better fuel efficiency, increased power, smoother acceleration, and reduced emissions. Find out more about the differences between standard and upgraded spark plugs here!