Parts for your 2007 Subaru Impreza-Starter motor

2007 Subaru Impreza Starter Motor — What It Does and How to Look After It

Based on technical sources, the 2007 Subaru Impreza absolutely uses a conventional 12‑volt starter motor. The Subaru Factory Service Manual for the 2007 Impreza (Starting/Charging System section), Subaru’s genuine parts catalogues listing a Denso starter motor assembly for EJ‑series petrol models, and mainstream repair manuals such as Haynes and Chilton all show the starter, its wiring, and the removal/refit procedure. So the starter motor is relevant to every 2007 Impreza with a petrol engine.

On this model, the starter motor’s job is simple but crucial: when the key is turned (or the start request is sent), the solenoid throws the pinion gear into the flywheel ring gear and spins the engine fast enough for fuel and spark to take over. The ECU, immobiliser, clutch or neutral safety switch, and the battery/charging system all play supporting roles, but the grunt work at crank-up is the starter’s domain.

For owners, good servicing habits go a long way to keeping it sweet. Clean, tight battery terminals and a healthy battery are non‑negotiable, a weak battery makes the starter look guilty when it’s not. The engine earth strap should be clean and secure too. If cranking is slow, there’s a single click with no spin, or there’s a rapid clicking, it’s worth testing voltage drop on the main positive and earth leads before calling the starter dead.

Typical life on a well‑looked‑after Impreza starter is often well past 150,000 km, but usage, heat, and oil leaks can shorten that. If replacement’s needed, many workshops fit a quality remanufactured Denso‑type unit or new OE‑spec, as they’re robust and usually a straight swap. Under the bonnet, the unit is mounted at the bellhousing, access can be from above or below depending on engine variant and tools on hand. Always disconnect the negative battery terminal first, then remove the two mounting bolts and the B+ and signal wires. Refitting is the reverse—be sure the mating surfaces are clean and the wiring is routed away from heat and moving parts.

Handy tips to keep the 2007 Impreza starter happy:

• Keep the battery charged and alternator output within spec.
• Inspect for oil seepage near the bellhousing that can foul the starter.
• If there’s a grinding noise at start, stop cranking—pinion or ring gear may be at risk.
• When unsure, an auto sparky can do a starter current draw and voltage drop test to pinpoint the fault.

Popular questions

Where is the starter motor on a 2007 Subaru Impreza?
The starter is bolted to the transmission bellhousing, where the engine and gearbox meet. On many EJ‑engine Imprezas it’s accessed from the top rear of the engine bay, though sometimes it’s easier from underneath with the car safely on stands. It engages the flywheel ring gear directly.

How long should a 2007 Impreza starter motor last?
With a healthy battery and charging system, many last 150,000–250,000 km or more. Frequent short trips, heat, and weak batteries shorten life. Slow cranking, a loud single click, or a high‑pitched free‑spin noise are all early warnings to have it checked.

Is a no‑start always the starter motor?
Not always. A flat battery, corroded terminals, a tired earth strap, or a faulty clutch/neutral safety switch can mimic starter failure. Quick checks—battery voltage, terminal condition, and listening for the solenoid click—help separate starter problems from simple electrical issues.