Parts for your 2020 Subaru Impreza-Ignition leads

2020 Subaru Impreza ignition leads — are they used?

Short answer: no. The 2020 Subaru Impreza (FB20 engine) doesn’t use traditional ignition leads. Technical documentation shows it runs a coil-on-plug ignition system with a dedicated “pencil” coil sitting directly on each spark plug. That means there are no high-tension spark plug leads to replace. This is confirmed by the Subaru Service Manual for MY2020 Impreza (Ignition System section, Subaru Technical Information System), as well as major parts catalogues that list no HT-lead sets for this model, including NGK Australia’s Vehicle Application Guide and common trade catalogues used across Australia and New Zealand.

Why no leads? Coil-on-plug setups sharpen spark energy and timing control, cut electrical losses, reduce radio interference, and tidy up the engine bay. With the coil mounted right on the plug, the long, failure-prone high-voltage cable is engineered out of the system. It’s a modern design shift Subaru has widely adopted across late-model FB-series engines.

What should be serviced instead? While there are no ignition leads, the ignition system still needs attention as part of normal maintenance:

• Spark plugs: replace at the interval in the owner’s manual (typically around the 100,000 km mark for iridium plugs in local schedules). Use the correct heat range and torque.
• Coil packs and boots: inspect for cracking, carbon tracking, oil contamination from rocker cover seals, and poor fit. Lightly apply dielectric grease to the inner boot during refit.
• Diagnostics: rough idle, hesitation under load, higher fuel use, or a flashing MIL with codes like P0301–P0304 can point to a plug or individual coil issue rather than any “lead” fault.

For anyone shopping online: if a listing claims to sell ignition leads for a 2020 Impreza, it’s usually a miscategorised part. The correct ignition items for this model are spark plugs and individual ignition coils. Sticking with quality, OE-spec parts and following the factory schedule will keep the FB20 running sweet and efficient for the long haul.

Technical sources referenced: Subaru Service Manual (MY2020 Impreza, Ignition System, Subaru Technical Information System), NGK Australia Vehicle Application Guide (listing for 2020 Subaru Impreza), mainstream AU/NZ parts catalogues that do not list HT-lead sets for this model.

Popular questions

Does a 2020 Subaru Impreza have ignition leads?
No. The MY2020 Impreza uses a coil-on-plug ignition system with an individual coil on each spark plug. There are no traditional high-tension leads to replace. This setup is documented in the Subaru Service Manual for the model year and reflected in AU/NZ parts catalogues that don’t list lead sets for this vehicle.

What should be maintained instead of ignition leads on this Impreza?
Focus on spark plugs at the scheduled interval, and inspect the individual ignition coils and their rubber boots for wear or contamination. Symptoms like misfires or poor economy usually trace to a plug or a single coil, not a lead.

Can aftermarket ignition leads be fitted to a 2020 Impreza?
There’s nowhere to fit them. The coil sits directly on the plug, so any “lead kit” advertised for this model is likely mislabelled. If you’re chasing an ignition fault, test plugs and the relevant coil, and replace with OE-spec parts as needed.