Alternator Fit For Toyota / 17-22/17-20 V6 3.5L Gas 180A 21248

Alternator Fit For Toyota Highlander/Sienna 17-22/17-20 V6 3.5L Gas 180A 21248

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Exceptional quality combined with strong adaptability
Easy and straightforward to install
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Precision-engineered for a perfect fit on your car
Superior performance for a long-lasting service life

Position and Function of the Alternator

In the automotive power and electrical system, the alternator is a core on-board power supply device and also the charging manager for the battery. As a key electrical component attached to the engine, it is installed in the engine compartment and driven by the engine pulley, serving as the primary power source for the vehicle's entire electrical system. It works in conjunction with the battery to supply power to the whole vehicle, being responsible for powering all on-board electrical equipment and recharging the battery.

Main Specifications

Amperage Rating:180A
Decoupled Or Clutch Pulley:Yes
Fan Type:IF
Belt Type:Serpentine Belt
Pulley Groove Quantity:6
Pulley Included:Yes
Pulley Type:Decoupler
Regulator Type:IR
Rotation Direction:CW
Voltage:12V
Pulley Class:SD6

Interchangeable Part Numbers

21248N, 21248, 42180, 270600P420, 1042110971, TN1042110971

Vehicle Fitment

Toyota Highlander 2017-2022 V6 3.5L Fits Gas Only
Toyota Sienna 2017-2020 V6 3.5L ​​

Installation Steps Of Alternator

1.Preparations:

① Turn off the engine, disconnect the negative battery terminal and clean the engine compartment.

② Prepare tools: socket wrench, torque wrench, belt tensioner tool.

③ Mark the wiring connectors and belt routing of the original alternator.

2.Remove the Old Alternator:

① Loosen the drive belt with a tensioner tool and remove the belt from the pulley of the old alternator.

② Unplug the electrical connector and remove the battery power cord from the B+ terminal.

③ Loosen and remove the fixing bolts, take off the old alternator, and clean dust and oil from the mounting position.

3.Install the New Alternator:

① Place the new alternator into the mounting bracket, align the holes, and screw in the main fixing bolts (leave 1-2 turns loose for belt adjustment).

② Route the belt back to the alternator pulley as marked, tension the belt with a tensioner.

③ Tighten the adjustment bracket bolts → main fixing bolts in sequence and lock them to the standard torque of the vehicle manual.

④ Reconnect and tighten the power cord on the B+ terminal, and plug in the electrical connector until a "click" is heard to confirm locking.

4 Power-On Test and Finishing:

① Reconnect the negative battery terminal and start the engine to idle for 3-5 minutes.

② Inspection: the pulley runs without jamming or abnormal noise, and the alternator has no oil leakage/peculiar smell.

③ Turn on high-power electrical appliances such as air conditioners and car lights to test stable power supply without belt slipping "squeak".

④ Clean up tools and reset the engine compartment guard plate/clips.

General Protection

1.Avoid colliding with the alternator bearing and wiring connector during installation to prevent component damage.

2.The alternator is a precision electrical component, do not rinse it directly with water to prevent internal water and short circuit.

3.If there is rust on the mounting position, a small amount of high-temperature resistant threadlocker can be applied after light sanding to prevent bolts from loosening due to vehicle vibration.

Key Notes

Please check your vehicle's make, model, year and OE number before purchase to ensure a perfect fit.
If you have any questions about compatibility or installation, feel free to contact us.
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Item Specifics

Brand: PARTHIGH
Type: Alternator
Voltage: 12 V
Features: Clockwise Rotation
Manufacturer Part Number: P134580T01
OE/OEM Part Number: 21248N, 21248
Amperage: 180 A
Manufacturer Warranty: 1 Year
Performance Part: No
Country/Region of Manufacture: Unknown
Finish: Polished
Universal Fitment: No
Vintage Car Part: No
Interchange Part Number: 42180, 270600P420
Pulley Groove Quantity: 6
Mileage: More Than 100,000 miles
Superseded Part Number: 1042110971, TN1042110971
Placement on Vehicle: Front
Regulator Type: IR
Fan Type: IF
Fitment Type: Direct Replacement
Part Name: Alternator
Material: Metal,Aluminum
California Prop 65 Warning: Yes
Belt Type: Serpentine Belt
Pulley Type: Decoupler
Pulley Class: SD6
Decoupled Or Clutch Pulley: Yes
Pulley Included: Yes