Parts for your 2016 Subaru Impreza-Alternator

2016 Subaru Impreza Alternator — what it does and how to look after it

For the 2016 Subaru Impreza, an alternator is absolutely fitted and relevant. Technical references including the Subaru Factory Service Manual for the 2012–2016 Impreza (Electrical – Charging System) and Subaru’s parts catalogue for the FB20 engine list a belt‑driven, ECU‑controlled alternator as standard equipment. It’s a Denso‑type unit designed to keep the 12‑volt system charged while the engine’s running.

In day‑to‑day driving, the alternator turns mechanical energy from the engine into electrical energy to maintain battery charge and power everything from headlights and fans to the ECU and safety systems. Without a healthy alternator, the battery quickly discharges and the car can stall or fail to restart.

Servicing the alternator on a 2016 Impreza is mostly about smart checks rather than constant replacement. At each service, it’s wise to inspect the serpentine belt for cracks or glazing and confirm correct tension, check battery terminals and grounds for corrosion, and listen for bearing noise from the alternator pulley. A quick multimeter test at the battery with the engine running should show roughly 13.8–14.6 volts