Parts for your 2018 Subaru Impreza-Starter motor

2018 Subaru Impreza starter motor — what it does and how to look after it

Yes, the 2018 Subaru Impreza uses a conventional 12‑volt starter motor. This is confirmed by Subaru’s factory service manual for MY2017–2019 Impreza (Starting/Charging System), the 2018 Impreza Owner’s Manual sections covering “If the engine does not start” and “Starting and operating”, and Subaru’s parts catalogue, which lists a starter assembly for the FB20 engine used in the 2018 model.

The starter motor’s job is simple but vital: it spins the engine fast enough for fuel and spark to take over. On many AU/NZ 2018 Imprezas fitted with Auto Stop Start, the starter is a heavy‑duty, gear‑reduction unit designed to cope with more frequent restarts while keeping noise and current draw down.

Good servicing starts with the basics. Keep the battery healthy—Auto Stop Start cars usually require an AGM/EFB battery with the correct rating. Clean and tighten battery terminals and the main engine/body earths, as poor connections mimic starter faults. It’s also wise to check the starter relay and the condition of the main cable to the starter for heat or abrasion under the bonnet.

• Slow crank or a single click when turning the key/pushing the button
• Intermittent no‑crank until a second attempt
• Grinding or whirring, suggesting poor engagement with the ring gear
• Lights stay bright but the engine won’t crank

If these show up after the battery tests fine, the starter could be on the way out. There’s no fixed replacement interval—many last well past 150,000 km—but frequent short trips and stop‑start traffic can shorten service life.

When replacement’s due, a quality OEM or reputable remanufactured unit is the smart pick. The Impreza’s starter is accessible with the battery disconnected and intake ducting moved aside, some models are easier from underneath. Mounting bolts and the electrical stud should be torqued to spec from Subaru service data, and it pays to inspect the flywheel/flexplate teeth while there. No coding is typically required after fitment, but the battery management system should be reset if a new battery is installed.

As part of routine servicing, ask for a starter current‑draw test, listen for abnormal engagement noise, and check for oil leaks from above that could contaminate the starter. A little preventative attention keeps those cold‑morning starts drama‑free.

FAQs

Does the 2018 Subaru Impreza have a starter motor?
Yes. Subaru’s factory service manual and the 2018 Owner’s Manual describe a 12‑V starter system, and the Subaru parts catalogue lists a starter assembly for the FB20 engine. It’s a conventional gear‑reduction unit, and on Auto Stop Start cars it’s built to handle frequent restarts.

How long does a 2018 Impreza starter motor usually last?
Many see 120,000–200,000 kilometres or more. Life depends on driving patterns—short trips and heavy stop‑start use add cycles. Subaru equips stop‑start models with a reinforced starter to cope, but keeping the correct AGM/EFB battery and clean connections helps longevity.

What should be checked before replacing the starter?
Rule out a weak or incorrect battery, corroded terminals, poor engine/body earths, and a faulty starter relay. If voltage supply is solid yet cranking is slow, intermittent, or noisy, the starter itself or the flywheel teeth may be the culprit.