Parts for your 2018 Subaru Exiga-Spark plugs

2018 Subaru Exiga Spark Plugs

Yes, spark plugs are absolutely relevant to the 2018 Subaru Exiga. The 2018 model (sold in Japan as the Exiga Crossover 7) runs a petrol, spark‑ignition Subaru FB-series boxer engine, which requires spark plugs to ignite the air–fuel mix. This is confirmed in Subaru’s service documentation for FB engines and the Crossover 7/Exiga owner’s manual, both of which include scheduled spark plug replacement. Major plug makers’ catalogues for Australia and New Zealand (NGK and Denso) also list long‑life iridium plugs for the 2018 Exiga/Crossover 7.

On this Exiga, the plugs do the heavy lifting every time the driver turns the key: they fire a precise spark that keeps starts clean, idle smooth, power strong and fuel use in check. Healthy plugs help the engine run crisply under load and keep emissions gear happy.

For regular servicing, most owners can plan on replacing the iridium plugs about every 100,000 km or roughly 6 years, whichever comes first, as indicated in Subaru schedules for FB-series petrol engines. If the vehicle tows, does lots of short trips, or spends time in dusty or very hot conditions, bringing that forward is smart. Between changes, a technician may inspect for wear, cracking, oil fouling or widened gaps if drivability concerns pop up.

Typical signs the Exiga’s plugs are past it include a rough idle, slower starts, a drop in fuel economy, hesitation on hills, or the check engine light with misfire codes. Left too long, tired plugs can overwork the coils and catalysts, turning a small job into a bigger bill.

When it’s time, stick with the Subaru‑specified long‑life iridium type and the correct heat range for the FB engine. They’re usually pre‑gapped, the factory spec is around the 0.7–0.8 mm mark, and most makers advise not to re‑gap iridium tips. On the boxer engine, access is snug under the bonnet, so following the workshop manual procedure is key: work on a cool engine, keep the plug wells clean, fit the new plugs by hand first, and torque to the Subaru spec. Anti‑seize isn’t recommended on most modern, nickel‑plated plugs. While in there, check the coil boots and apply a light smear of dielectric grease.

• Service interval guide: about 100,000 km/6 years under normal use.
• Use OEM‑equivalent iridium plugs to Subaru spec for the FB engine.
• Have a pro handle replacement if access or tools are limited.

Popular questions about 2018 Subaru Exiga spark plugs

How often should spark plugs be replaced on a 2018 Subaru Exiga?
For most owners, every 100,000 km or around 6 years is the go for the FB‑series petrol boxer. If the vehicle tows, does many short trips, or runs in harsh conditions, consider earlier replacement or at least a mid‑cycle inspection.

What type of spark plug does the 2018 Exiga use?
Long‑life iridium plugs to Subaru’s spec for the FB engine. They come pre‑gapped near 0.7–0.8 mm, avoid tweaking the gap on iridium tips and always match the correct heat range listed in Subaru service info or reputable Australian/NZ plug catalogues.

What symptoms point to worn spark plugs on an Exiga?
Rough idle, hard starting, sluggish acceleration, higher fuel use, and a check engine light with misfire codes are the usual tell‑tales. Sorting plugs early can prevent damage to ignition coils and catalytic converters.