Parts for your 2017 Subaru Legacy-Ignition leads

Understanding Ignition Leads on the 2017 Subaru Legacy

When it comes to the 2017 Subaru Legacy, it's important to clear up any confusion around ignition leads and whether they play a part in this vehicle's ignition system. The simple answer is that the 2017 Subaru Legacy does not use traditional ignition leads. Instead, it relies on a modern ignition system setup that makes the ignition leads redundant.

Now, why is that the case? Traditional ignition leads, also known as spark plug wires, are typically found on older engine designs. They carry the high voltage current from the ignition coil to the spark plugs, which then ignite the fuel-air mixture in the engine cylinders. These leads had to be well insulated and robust enough to handle the volatile electrical charge while resisting wear and tear from engine heat and movement.

However, the 2017 Subaru Legacy is fitted with a coil-on-plug ignition system. This means each spark plug has its own individual ignition coil mounted directly on top of it, eliminating the need for wires or leads to transfer the spark. This setup has been widely adopted across modern vehicles for several reasons.

Firstly, the coil-on-plug system improves ignition reliability by reducing electrical resistance and potential weak points between the coil and plug. Without the leads, there is less chance of misfiring due to worn or damaged wires. Secondly, it simplifies maintenance and enhances engine efficiency, as the ignition coils are designed to deliver a more precise and stronger spark directly to each cylinder.

Given this, ignition leads are not a relevant part when it comes to the 2017 Subaru Legacy. If you were to look under the bonnet, you would notice that instead of a tangle of wires, you will see compact ignition coils directly installed on the spark plugs themselves. This modern technology removes the need to service or replace ignition leads, which was a common maintenance task in older vehicles.

For those still wondering about ignition lead maintenance on cars that have them, it's worth understanding what role they play and why keeping them in good shape was once important. On older cars, ignition leads had to be routinely inspected for cracks, corrosion, and general deterioration because failing leads could lead to engine misfires, poor fuel economy, and difficulty starting the car.

Replacing ignition leads regularly was a key part of service schedules, often recommended every 50,000 to 100,000 kilometres depending on the vehicle and lead type. Good quality leads helped maintain consistent engine performance and smooth running, especially in harsh Aussie conditions where heat and moisture could wreak havoc on ageing wiring.

Since the 2017 Subaru Legacy skips the ignition leads entirely, owners enjoy fewer maintenance headaches regarding the ignition setup. Instead, the focus shifts to ensuring that ignition coils and spark plugs remain in good condition. Spark plugs generally need replacing at around 100,000 kilometres, and ignition coils are checked if any related fault codes appear or if misfire symptoms occur.

If someone owns or services a 2017 Subaru Legacy, the takeaway is to not waste time hunting for ignition leads because they simply do not exist on this model. Instead, look after the ignition coils and spark plugs. That means occasionally inspecting coil electrical connectors for corrosion or damage and promptly replacing any faulty coils to avoid engine performance issues.

In terms of the big picture, the move away from ignition leads exemplifies how automotive technology continues to advance, making cars more reliable and easier to maintain. The 2017 Subaru Legacy's coil-on-plug system reduces the number of components and eliminates a failure point, which translates to better driving experiences and fewer trips to the mechanic.

So, if you're considering maintenance or servicing for a 2017 Subaru Legacy, it pays to understand that ignition leads are not part of the puzzle. Keep an eye on your spark plugs and ignition coils instead, and you're well on your way to a smooth-running turbocharged or naturally aspirated boxer engine that Subaru is famous for.