Parts for your 2017 Subaru Impreza-Spark plugs

Spark Plugs on the 2017 Subaru Impreza: What You Need to Know

The 2017 Subaru Impreza, like most petrol-powered vehicles, definitely relies on spark plugs as a vital component of its engine system. Spark plugs play an essential role in getting this car up and running smoothly and efficiently. Simply put, without spark plugs, the petrol engine simply would not ignite the air-fuel mixture in the cylinders, meaning the car won't start or run properly. So, yes, spark plugs are absolutely relevant and used on the 2017 Impreza.

Now, let's look at what spark plugs actually do and why they are important in everyday driving, plus some helpful info on when and why they need servicing or replacement.

Spark plugs are tiny but mighty parts screwed into the engine's cylinder head. Their main job is to produce a small, controlled electrical spark at just the right moment. This spark ignites the compressed air-fuel mixture inside each cylinder, triggering the internal combustion process that powers the engine. Without spark plugs creating sparks, the engine's pistons just push air and fuel around with no bang, which means no power or movement.

The 2017 Subaru Impreza's boxer-style engine uses spark plugs that are specially designed to handle its unique characteristics and demands. The engine control unit (ECU) carefully times the spark plugs' firing to maximise performance, fuel efficiency, and emissions control. In simple terms, good spark plugs help the car run smoothly, use fuel efficiently, and keep harmful emissions down.

Over time, however, spark plugs wear out. The tips get fouled by carbon deposits, or the electrodes can erode due to the high heat and pressure inside the engine. This wear can cause misfires, rough idling, reduced power, poor fuel economy, and difficulty starting the engine. That is why regular inspection and replacement of spark plugs are crucial aspects of maintaining any petrol car, including the 2017 Subaru Impreza.

The manufacturer, Subaru, typically recommends changing spark plugs every 60,000 to 100,000 kilometres, depending on the type of plugs fitted. For the 2017 Impreza, which commonly comes with iridium-tipped spark plugs, they tend to last longer than standard copper plugs thanks to their durability and resistance to wear. Still, it is essential to follow the servicing schedule outlined in the owner's manual to avoid any engine issues.

During spark plug replacement, technicians will remove the old plugs and inspect them for signs of wear or damage, which can offer valuable clues about the engine's health. For example, oily plugs may indicate leaking valve seals, while excessively worn plugs might point to incorrect engine timing or fuel issues. Replacing the plugs with the correct type and gap settings ensures the engine maintains optimal spark performance.

It is useful for Subaru Impreza owners to know a few key tips about spark plugs:

• Regular servicing of spark plugs helps maintain fuel economy and engine responsiveness.
• Using the correct spark plug type specified by Subaru is crucial for performance and durability, this is usually iridium or platinum plugs for this model.
• DIY spark plug replacement can be risky if not done properly because over-tightening or improper installation can damage the engine.
• For those who experience poor starting, reduced power, or uneven idling, faulty spark plugs could be a common cause worth checking first.

Aside from replacement, spark plug maintenance can sometimes include cleaning and gap adjustment, although modern plugs are generally best replaced rather than cleaned. These plugs are designed to perform optimally with precise electrode gaps, so correct gapping is essential to keep your 2017 Impreza firing on all cylinders.

Although spark plugs are just one part of the ignition system, they interact closely with ignition coils and the ECU. Ignition coils boost the voltage needed to create sparks at the plugs, and any issues with coils can sometimes be mistaken for spark plug problems. Having a qualified mechanic inspect both will give peace of mind and help avoid unnecessary replacement parts.

In summary, the 2017 Subaru Impreza depends on well-maintained spark plugs to keep its boxer engine running efficiently. Regular servicing according to Subaru's guidelines can prevent engine misfires, preserve fuel economy, and ensure reliable starting and smooth running. For any Subaru owner, making sure spark plugs are looked after is a smart way to keep their Impreza performing its best on Aussie roads for years to come.