Subaru Alternators

A DIY Guide to Upgrading Your Stock Alternator

Upgrading your stock alternator is one of the smartest ways to boost your Subaru’s electrical reliability. For Outback owners, a failing alternator can lead to battery drain, dim lighting, and weakened accessory function—problems that often put extra strain on the starter, which depends on consistent voltage to operate efficiently. Here's why you should replace an old alternator to improve overall driving experience.

Top Reasons to Replace an Old Alternator in Your Outback

Flickering or Dimming Lights

Inconsistent lighting output is a common sign your alternator isn’t providing steady power.

Battery Keeps Dying

If your battery won't hold a charge, the alternator may not be generating enough current.

Accessory Power Loss

Loss of power to systems like the radio or seat warmers suggests electrical underperformance.

Unusual Engine Sounds

Squealing or grinding noises can mean worn-out alternator bearings or pulley issues.

Dashboard Warning Lights

An illuminated battery icon or voltage warning indicates alternator trouble.

Slow Engine Crank

A weak alternator can make your engine slow to turn over, even with a healthy battery.

Burning Smell Under the Hood

Overheating alternator components may produce a distinct burning rubber or wire odor.

Order here for exclusive discounts on genuine Subaru parts that fit your vehicle perfectly. Need help? Contact us—we’re happy to assist with anything your Outback needs.