Parts for your 2019 Subaru Xv-Ignition coils

2019 Subaru XV ignition coils — what they do and when to replace

The 2019 Subaru XV (including e-Boxer hybrid variants) uses individual coil-on-plug ignition coils on its 2.0‑litre FB20 petrol boxer engine, so ignition coils are definitely relevant to this model. This is documented in the Subaru Factory Service Manual for the FB20 engine (Ignition System section, 2018–2020 XV/Crosstrek coverage) and confirmed by the Subaru Electronic Parts Catalogue (FAST) for the GT‑series XV, which lists four ignition coils, one per cylinder.

Each ignition coil’s job is to step up battery voltage to a serious spark, firing the iridium plugs precisely when the engine control unit commands it. Being coil‑on‑plug, there are no old‑school leads to chase, the coil sits directly over the plug for a clean, efficient spark that suits the XV’s compact boxer layout and, on direct‑injection variants, helps with reliable ignition under leaner conditions.

There isn’t a fixed, routine replacement interval for coils on the 2019 XV. They’re a “replace when needed” item. Good practice is to inspect them whenever the spark plugs are changed (typically around the manufacturer’s long‑life interval, often about 100,000 km — check the service schedule for the specific market and engine code). During a service, a tech will look for cracked housings, swollen or heat‑hardened boots, oil in the plug tubes, loose connectors, and any arcing marks. Keeping water and degreaser away from the coil tops when washing under the bonnet helps longevity.

When a coil starts to go, the car may throw a check‑engine light and log misfire codes (for example P0301–P0304) or coil circuit codes (P0351–P0354). Symptoms can include a rough idle, hesitation on take‑off, higher fuel use, or a raw fuel smell from the exhaust. It’s fine to replace a single failed coil, but many owners opt to do the pair or the full set if kilometres are high, to keep things even. Stick with quality OE or reputable aftermarket coils that specifically suit the FB20 in the 2019 XV. During installation, seat the boot fully on the plug, use a light smear of dielectric grease on the inside of the boot, tighten to the torque spec in the Subaru service manual, reconnect the harness securely, clear codes, and road‑test.

• Common signs: rough idle, hard starts, loss of power, flashing MIL, fuel smell.
• Good habits: avoid soaking coils, check plug tube seals for oil, scan for stored misfire data after any drivability complaint.

Technical sources referenced: Subaru Factory Service Manual (FB20 Ignition System, 2018–2020 XV/Crosstrek), Subaru FAST Electronic Parts Catalogue for 2019 GT‑series XV, Subaru Technical Information System publications.

FAQs

How many ignition coils are on a 2019 Subaru XV and where are they?
There are four coils, one per cylinder. They sit directly on top of each spark plug under the plastic engine cover. Remove the cover and you’ll see each coil with an electrical connector going into it.

When should the ignition coils be replaced on a 2019 XV?
There’s no set kilometre interval. Replace coils when they’re faulty or showing damage. Have them inspected whenever spark plugs are changed (often around 100,000 km, depending on the service schedule) or if misfire fault codes appear.

Can aftermarket coils be used on the 2019 XV?
Yes, but choose reputable brands that list the FB20 engine and 2019 XV specifically. Cheap, off‑spec coils can cause intermittent misfires and may not last. Many owners prefer OE coils for consistent performance.