Parts for your 2018 Subaru Forester-Ignition leads

Ignition Leads on the 2018 Subaru Forester: Are They Needed?

The 2018 Subaru Forester is a modern SUV known for its reliability and practical design. When it comes to ignition leads, this particular model does not use traditional ignition leads like older vehicles might. Instead, the 2018 Forester is equipped with a coil-on-plug ignition system, which means it has individual ignition coils mounted directly on top of each spark plug. This setup eliminates the need for ignition leads or spark plug wires that are common in older ignition systems.

So, why is this important? Older cars used ignition leads as the wires that carried high voltage electricity from the ignition coil to each spark plug. These wires were essential to ensure the spark plugs fired correctly, igniting the air-fuel mixture in the engine's cylinders. With the coil-on-plug system in the Forester, the ignition coil generates the high voltage required for each spark plug right at the plug itself, meaning there are no cables needed to transfer this electricity.

There are several advantages to this type of ignition design. Without ignition leads, there is a reduction in potential failure points. Ignition leads can wear out, crack, or develop resistance, which compromises engine performance. Because the Forester uses coil-on-plug ignition, it avoids these risks altogether, making the ignition system more reliable and easier to maintain. This configuration also helps improve fuel efficiency and reduces harmful emissions by ensuring optimal spark timing and power.

For owners of a 2018 Subaru Forester, this means that there is no need to worry about inspecting, replacing, or maintaining ignition leads as part of regular servicing. Instead, attention is typically focused on other ignition components, including spark plugs and ignition coils themselves. These components work together to keep the engine running smoothly and efficiently.

When servicing the vehicle, mechanics will usually check the condition of the ignition coils and spark plugs. The coils can sometimes develop faults, such as internal shorts or open circuits, which would cause misfires or poor engine performance. Spark plugs are also checked and replaced as needed because worn spark plugs can cause rough idling, reduced fuel economy, and difficulty starting the engine.

In terms of maintenance advice for the 2018 Forester's ignition system, it's always a good idea to stick to the manufacturer's recommended service intervals. Subaru typically suggests inspecting or replacing spark plugs around the 100,000-kilometre mark, but this can vary slightly depending on the engine variant and driving conditions. Although ignition coils generally have a longer lifespan, persistent misfire codes during diagnostic scans may indicate it is time to check or replace these coils.

Because there are no ignition leads to disconnect or inspect, servicing the ignition system on the 2018 Forester tends to be less labour-intensive and more straightforward than on older vehicles. This reduces the chances of damage during maintenance and can save time and costs for vehicle owners. However, if any ignition coil faults are detected, it's important not to ignore them, as they directly affect the vehicle's drivability and emissions performance.

In the event of replacing coils or spark plugs, using genuine Subaru parts or high-quality aftermarket components is beneficial. This ensures compatibility and optimal performance, keeping the Forester's engine firing on all cylinders as it should. When replacing spark plugs, following the correct torque specifications is also critical to avoid damage and ensure a secure fit.

Overall, the exclusion of ignition leads in the 2018 Subaru Forester's ignition system is a sign of modern automotive technology making engine ignitions more reliable and easier to maintain. While ignition leads are a familiar component for many older petrol cars, this Forester model has moved on to a design that eliminates the need for them altogether. This leads to fewer maintenance hassles and helps keep the Forester running smoothly for many kilometres on the road.