This list is a sample of all the compatible cars for this part. Make sure this product fits your car by using the part finder above.COMPATIBLE WITH or REPLACEMENT FOR TOYOTA: Highlander V6 3.0L (01-03)COMPATIBLE WITH or REPLACEMENT FOR LEXUS: RX300 V6 3.0L (99-03)
From the brand
From the manufacturer
Why the Alternator Is a Big Deal
Once the engine is running, the alternator becomes the primary power source for:
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Engine control modules and ignition
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Fuel system and sensors
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Headlights and exterior lighting
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Climate control and interior electronics
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Charging and maintaining the battery
Premier Gear is Professional Grade
Engineered for Quality
Professional Grade.
- Premier Gear replacement alternators are designed and manufactured to meet or exceed the standards of the original equipment unit we are replacing.
- Premier Gear alternators are completely new manufactured, using high-quality, and inspected components.
- Nothing is remanufactured or previously used. With hundreds of applications available, there is most likely a Premier Gear alternator available to fit your car, truck or SUV
When alternator output starts dropping, the battery is forced to pick up the slack — and it won’t last long. Common symptoms include:
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Repeated dead batteries
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Flickering or dim headlights
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Charging or battery warning lights
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Random electrical glitches
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No-start situations at the worst possible time
Replacing the alternator solves the root problem, not just the symptoms.
OEM vs Premier Gear
Premier Gear Product Technical Information
Application Specific
– Our alternators are all new components. Nothing used, or refurbished.
– All finished products are fully tested to O.E.M. specifications and standards for performance and fit.
– Alternators are thoroughly validated for output current at idle and full load speed.
– Endurance and environmental validated.
Factory-Correct Charging Output
Toyota engineered these V6 platforms around a specific charging capacity to ensure long-term electrical stability. The PG-13844 alternator delivers:
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Stable voltage at idle and cruising speeds
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Proper battery recharge after cold starts
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Consistent current under accessory load
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Reduced strain on wiring and electrical components
It’s not oversized, not underpowered — it’s exactly what these vehicles expect.
Premier Gear products are made using premium WBD Bearings and designed with:
– 3-point triple-lip full contact hybrid polyacrylic seals.
– Kyodo Yushi high temperature grease. A grease composition for high-temperature, high-speed and high-loads.
Premium Internal Electronics
Meets or exceeds all O.E.M. specifications.
– O.E.M. type diodes utilized on rectifier assemblies to ensure maximum field life.
– Welded diode to rectifier lead frame assembly to enhance performance and field life.
– Utilizing advanced components for the voltage regulators resulting in lowest power (heat) dissipation – extended field life of alternator.
Premier Gear units optimize wear resistance and deliver consistent electrical charge
Built for Reliability and OE Fitment
The PREMIER GEAR PG-13844 alternator features:
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High-efficiency copper windings
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Internal voltage regulator for consistent output
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Precision-balanced internals for smooth operation
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OE-style mounting points and electrical connectors
The result is quiet operation, long service life, and charging you don’t have to think about — which is exactly how it should be.
All products go through stringent validation processes before packaging and release to the market
– Endurance.
– Humidity.
– Power Thermal Cycling.
– Vibration.
– Salt Spray.
– Power thermal cycle tested from -40°C to 200°C to meet minimum of 5000 cycles.
- All products go through stringent validation processes before packaging and release to the market
Why Buy from Pro Street Online?
At Pro Street Online, we focus on parts that actually fix problems. This alternator is:
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Vehicle-specific
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Properly rated
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Designed for OE-level performance
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Ideal for daily drivers and long-term ownership
If your Highlander or RX300 is still going strong, this alternator helps keep it that way.
Final Verdict
The PREMIER GEAR PG-13844 Replacement Alternator is the right solution for aging Toyota Highlander and Lexus RX300 V6 models suffering from charging issues. Direct fitment, factory-correct output, and dependable construction make it a smart replacement for a tired OEM unit.
nathan –
Two days in a 2000 Lexus RX-300. No issues so far. I realize this is only two days so I will report back in 6 months or if it craps out on me before then.***Edit (one year later)***Car has been doing fine all year but starting to see some headlights flickering issues, clock resetting. Will be digging deeper soon to see if alternator is culprit. I plan to report back.*Edit* The alternator was the culprit so it did only last a year.
sammie Nguyen –
Just bought and replaced the alternator, went to Autozone to test the battery and alternator and it said the charging system failed. BAD alternator, left alone the pulley came much larger compare to the OEM and took me 5 hours try to figure out why the belt is too short. Had to exchanged couple belts but made it work and at the end found out the pulley is too large.
Karly –
Quick delivery, works great my truck is back on !! Thank you!
Spide –
Fairly easy to install, one bolt gave us trouble. Car runs fine now.
Dennis Ford –
Good fit for my 2003 Toyota 6 Cylinder Highlander. So far, so good….
Josephine –
works well
Mark Zito –
May 23rd I received a new alternator, June 28th, it died. I didn’t buy it for the practice of installing. Piece of garbage. Do not recommend,,I returned this to the ups store. They aren’t showing it returned
Concept2Solution –
Change belts while you’re at it. (Belts will be a “PITA” and will need to be stretched.)