Functions of an Alternator
The alternator converts engine mechanical energy to electrical energy, charges the battery, and stabilizes voltage to power vehicle electronics.
1.Power Supply to Electrical Systems:Converts mechanical energy from the engine (via a belt drive) into alternating current (AC), which is rectified to direct current (DC) to power in-vehicle electrical components during engine operation.
2.Battery Charging:Maintains the car battery’s charge by replenishing power consumed during startup when the starter motor draws heavy current and compensating for energy used by electrical devices. Prevents battery depletion and ensures reliable engine restarts.
3.Critical for Vehicle Operation:A faulty alternator leads to battery drain, failure of electrical systems, and eventual engine shutdown once the battery is depleted.
Product Details
- Amperage Rating:130A
- Decoupled Or Clutch Pulley:Yes
- Fan Type:IF
- Belt Type:Serpentine Belt
- Pulley Groove Quantity:6
- Pulley Included:Yes
- Pulley Type:Clutch
- Regulator Type:IR
- Rotation Direction:CW
- Voltage:12V
- Pulley Class:SC6
Vechicle Information
- Subaru Crosstrek 2016 H4 2.0L GAS
- Subaru Crosstrek 2017 H4 2.0L All Fuel
- Subaru Impreza 2015-2016 H4 2.0L All Fuel
- Subaru WRX 2015-2021 H4 2.0L All Fuel
- Subaru XV Crosstrek 2015 H4 2.0L GAS
Interchanges Part Number
10253, 11869, A2TX5081, 23700-AA910, 23700-AA911
Alternator Replacement Instructions
1.Disconnect the Battery.Turn off the engine and remove the negative (-) battery terminal to avoid electrical shorts. Wait 5-10 minutes for residual power to dissipate.
2.Remove the Serpentine/Drive Belt.Locate the belt tensioner. Use the tensioner tool to relieve pressure, then slip the belt off the alternator pulley. Note the belt routing.
3.Disconnect Electrical Connections.Unplug the alternator’s electrical connectors and remove the positive (+) power cable bolt. Keep fasteners organized.
4.Remove the Alternator Mounting Bolts.Use the socket wrench to remove the bolts securing the alternator to the engine bracket . Gently pull the alternator out of the mounting bracket.
5.Install the New Alternator.Place the new alternator into the mounting bracket, align the bolt holes, and hand-tighten the mounting bolts then torque to the manufacturer’s specification, usually 25-35 N·m.
6.Reconnect Electrical Components.Attach the positive power cable and tighten the bolt. Plug in the electrical connectors until they click into place.
7.Reinstall the Drive Belt.Use the tensioner tool to release pressure, then route the belt back onto all pulleys. Ensure the belt is properly seated in each pulley groove.
8.Reconnect the Battery.Clean the battery terminals and reattach the negative (-) terminal. Tighten securely.
9.Test the New Alternator.Start the engine and use a multimeter to check the output voltage. Verify that all electrical components work normally.
Notes
1.Always use an alternator matching your vehicle’s make, model, and engine type according to checking VIN for accuracy.
2.Do not over-tighten bolts or the drive belt (risk of damage to the alternator or pulley).
3.If unsure about torque specs or belt routing, refer to the vehicle’s service manual.