23721AA100 Subaru BRG-ALTNTR, Price: 11.49$, Weight: 0.065kg

    • Make Number Name Availability Weight, kg Ship in, Days Price

    Subaru

    23721AA100

    BRG-ALTNTR

    		 0

    0.065

    2-3

    11.49$
    Not Available

    Substitutions

    Make Number Name Availability Weight, kg Processing, days Price  
    Subaru
    23721AA101 
    BRG-ALTNTR
    		70
    1.15
    2-3
    11.49$
     

    Alternator Rotor Bearing

    This small but critical bearing keeps the alternator rotor spinning true and smooth. When your engine runs, the alternator must rotate at high speed to charge the battery and feed power to lights, ECU, ignition, and accessories ⚡. The bearing is needed to support the rotor shaft, reduce friction, and prevent metal-to-metal wear.

    How It Works

    Inside the alternator, the rotor turns within the housing. The bearing holds the shaft in perfect alignment while allowing free rotation. It also absorbs belt load and vibration, keeping the magnetic field stable so the alternator can produce steady voltage.

    Signs of Failure & What Happens If Broken

    If the bearing wears out, you may hear whining, grinding, or chirping that changes with RPM ?. The rotor can wobble, damaging windings, pulley, or housing. In severe cases the alternator can seize, snap the drive belt, and you may lose charging—leading to a dead battery, warning lights, stalling, and no-start issues.

    Compatible Models

    • L300