Parts for your 2007 Subaru Impreza-Alternator

2007 Subaru Impreza Alternator

Based on technical sources including the Subaru Factory Service Manual (2007MY Impreza, Charging System section), Subaru Technical Information System documentation, and the Haynes Repair Manual for Subaru Impreza 2002–2011 (Electrical/Charging chapters), the 2007 Subaru Impreza is equipped with a belt-driven alternator (typically Denso or Mitsubishi Electric, around 90–110 A depending on engine/trim). So yes—the alternator is absolutely relevant and fitted to this vehicle.

The alternator on a 2007 Subaru Impreza keeps the battery topped up and powers the car’s electrics while the engine’s running—headlights, wipers, heater fan, ABS, ECU, stereo, and the lot. Its internal regulator holds charging voltage around the mid-14s so the battery charges without being overcooked. When things go south, drivers may see the battery warning light, get dim lights at idle, hear a bearing whine, or cop a flat battery after short trips.

Good servicing under the bonnet helps the alternator live a long life. A quick look during regular services (every 10,000–15,000 kilometres is a fair rhythm in AU/NZ conditions) goes a long way:

• Check the drive belt for cracks, glazing, or fraying, and set tension to spec. A slipping belt can mimic a “dead alternator.”
• Inspect the alternator plug and main output cable for corrosion or looseness