Parts for your 2012 Subaru Impreza-Ignition leads

Ignition Leads on the 2012 Subaru Impreza: Are They Used and What You Should Know

The 2012 Subaru Impreza is a popular choice among Aussie drivers thanks to its robust performance and reliable engineering. When it comes to the ignition system, many people wonder if this model uses traditional ignition leads, also known as spark plug wires. To clear things up, the 2012 Subaru Impreza does not use ignition leads in the conventional sense. Instead, it features a modern ignition system where the components that would usually be connected by ignition leads are integrated differently.

In older vehicles or certain engine designs, ignition leads played a critical role. They are essentially insulated wires that carry high-voltage electricity from the ignition coil to the spark plugs. This spark is what ignites the air-fuel mixture inside the engine cylinders, making the engine run smoothly. However, the 2012 Subaru Impreza utilises coil-on-plug (COP) ignition technology rather than traditional coil packs and ignition leads.

So why is there no need for ignition leads in this car? The answer lies in advancements in vehicle technology and engineering. The coil-on-plug system places the ignition coil directly on top of each spark plug. This design does away with the need for separate ignition leads because the electrical connection is built into a compact unit that sits right on the plug. By removing the ignition leads, Subaru has increased reliability and reduced maintenance complexity for drivers.

Coil-on-plug systems offer several benefits compared to older setups using ignition leads. For one, they are less vulnerable to damage caused by heat and vibration - common issues in engine bays that can lead to lead failure or electrical leakage. Because the electrical components are more securely housed, the ignition system can provide a more consistent and powerful spark, which means better engine performance and improved fuel efficiency.

Another upside of not having ignition leads is that it reduces problems related to moisture and corrosion. Traditional ignition leads can crack, wear out, or suffer from corrosion at the terminals, leading to misfires or poor engine running conditions. With coil-on-plug, these problems are mostly eliminated, so overall reliability is improved.

Even though ignition leads are not a feature on the 2012 Subaru Impreza, it's still important to maintain the ignition system as part of regular servicing. The coil-on-plug units and spark plugs themselves need attention over time. The coils can fail, though less frequently than ignition leads, and spark plugs wear out with use and age. Regular inspection will help avoid issues such as engine misfires, rough idling, or reduced fuel economy.

When performing servicing on the ignition system of a 2012 Subaru Impreza, mechanics typically check the condition of the spark plugs first. Spark plugs should be replaced every 60,000 to 100,000 kilometres depending on the specific type fitted to the vehicle. Worn spark plugs can cause weak sparks and affect engine performance. The ignition coils on top of these plugs should also be tested to make sure they are functioning correctly, although coil failures are less common than damage to ignition leads in older cars.

Replacing ignition coils on the 2012 Subaru Impreza is relatively straightforward since they are easy to access and are designed for coil-on-plug systems. If a coil is found to be faulty, it is recommended to replace it rather than attempt repairs, as faults usually affect the performance of their associated cylinder causing misfires and hesitation.

Overall, without ignition leads, the ignition system of the 2012 Subaru Impreza is simpler and more reliable. This design choice lowers the likelihood of ignition faults caused by degraded wiring and offers drivers longer periods between maintenance intervals. However, it still pays to keep the coils and spark plugs in tip-top shape to get the best out of the engine's performance and longevity.

So while you won't find ignition leads in your 2012 Subaru Impreza, understanding how the ignition system works and performing the necessary maintenance will keep your car running strong for years to come. Getting into a good routine with regular check-ups for your spark plugs and ignition coils ensures that you stay on top of any issues before they become costly headaches.