Parts for your 2014 Subaru Impreza-Ignition leads

2014 Subaru Impreza Ignition Leads

For the 2014 Subaru Impreza, ignition leads (spark plug wires) aren’t a thing. Technical sources including the Subaru Factory Service Manual for the 2014 MY Impreza (Engine Diagnostics – Ignition System), the Subaru FAST Electronic Parts Catalogue, and major ignition catalogues (NGK/NTK, Denso) show this model runs a coil-on-plug (COP) setup. That means each spark plug has its own ignition coil mounted directly on top, with no high-tension leads running across the engine.

Why did Subaru skip ignition leads on this model? Coil-on-plug improves spark energy and timing accuracy, cuts electrical losses, reduces radio interference, and helps with packaging and emissions. It’s a modern, reliable design that suits the FB-series engines (FB20 2.0-litre and FB16 where fitted), and even the performance EJ engines used in 2014 WRX/STI run direct coils rather than traditional leads. If someone is hunting for leads under the bonnet of a 2014 Impreza, they won’t find any – because the car doesn’t use them.

What should owners look after instead? The key bits are the spark plugs, the individual ignition coils, and the coil boots/connectors. Follow the service schedule in the owner’s manual for plug replacement intervals (often long-life iridium, so replacement is typically at higher kilometre marks). At each service, it’s smart to check for oil in the plug tubes (from rocker cover seals), inspect the coil boots for cracks or carbon tracking, and make sure the coil connectors are snug and corrosion-free.

If there’s a misfire, the car may throw codes like P0301–P0304. A quick plan is to confirm plug condition and gap, swap the suspect coil to another cylinder to see if the fault follows, and check battery/charging voltages – low system voltage can upset coil performance. Coils are replaced as needed, there’s no routine “lead set” to change on this model.

• No ignition leads fitted from factory on 2014 Impreza.
• Service the spark plugs as per schedule, inspect coils and boots during routine servicing.
• Diagnose misfires via OBD-II, plug condition, and coil swap testing.

Popular questions about 2014 Subaru Impreza ignition leads

Does a 2014 Subaru Impreza have ignition leads?
It doesn’t. This model uses coil-on-plug ignition, with a dedicated coil sitting directly on each spark plug. Technical references like the Subaru Factory Service Manual and the Subaru EPC list ignition coils and boots, but no high-tension lead set.

What replaces the job of ignition leads on this car?
The individual coil-on-plug units do the job. Each coil fires its spark plug directly, controlled by the engine computer. The short rubber boot on the coil provides the insulated path to the plug.

What should be serviced or replaced instead of leads?
Stick to the spark plug replacement interval in the service schedule, and inspect the ignition coils and boots for damage, tracking, or oil contamination. Replace coils only if they test faulty or cause a repeatable misfire.