Product Attributes

Product Details

Product Overview

The 104210-4670 is a Lexus OE-spec replacement alternator delivering 12V 150A output with a 7-rib (7PK) pulley, engineered for Lexus GS300 and IS250 models with GR-series V6 petrol engines. This Denso-pattern aftermarket unit matches the original charging-system specification for these premium mid-size sedan and convertible platforms.

Fitted with internal regulator design, this brand-new alternator is stocked in-house with a 1-year warranty and 10-day dispatch lead-time. The 150-amp rating is factory-correct for the heavier electrical load of Lexus premium applications, supporting climate control, heated and ventilated accessories, premium infotainment and factory electrical equipment.

Key physical specs: net weight 5.7 kg, gross weight 6.0 kg, overall dimensions 240 x 170 x 180 mm, supplied inside neutral kraft inner carton.

The GR-Series V6 Engine Platform and 150A Charging System

The Lexus GS300 and IS250 use the GR-series V6 engine family: the 3.0L 3GR-FSE / 3GR-FE in the GS300 and the 2.5L 4GR-FSE in the IS250. The 150A 7PK alternator covers these applications, which keeps one part number serving multiple premium-platform workshop jobs.

This Denso-pattern unit is specified as 12V 150A, matching the factory charging-system specification of these platforms. The 7-rib pulley matches the original accessory-belt layout, driving alternator, water pump and power-steering pump. Installing a pulley with the wrong rib count will cause belt mis-tracking, slippage, premature belt wear and charging faults. Always cross-check against your old alternator before ordering.

Technical Specifications

Engine Compatibility and Cross Reference

This alternator fits Lexus GS300 and IS250 vehicles equipped with GR-series V6 petrol engines. Do not rely solely on vehicle model name for fitment validation; always verify engine code, body code, old-part OE number, pulley rib-count and amp label on your original alternator.

Multiple Denso, Lexus and supplier OE numbers appear across production batches and regional market specifications for this same alternator family. If your original unit bears one of the listed cross-reference numbers, 104210-4670 serves as a direct drop-in replacement.

What to Look for in a Replacement

Follow these five verification steps before placing your order to avoid wrong-part returns:

• 1. Check the amperage label on your old alternator: confirm the rating (150A as listed, the page also states 110A). Different amp ratings are not interchangeable.

• 2. Count pulley ribs: this unit requires 7PK (7-rib). Units with a different rib count are incompatible for this accessory drive setup.

• 3. Confirm engine code is 3GR-FSE / 3GR-FE or 4GR-FSE, and the body code matches the fitment list.

• 4. Match against OE / reference part numbers stamped on your original housing.

• 5. Weight cross-check: genuine matching unit weighs approximately 5.7 kg net; significant weight difference indicates wrong assembly.

Application Scenarios

• Independent repair shops and Lexus specialists servicing GS300 and IS250 across Europe, Oceania, Asia-Pacific and Latin-American markets.

• Parts counters and jobbers stocking Japanese premium vehicle replacement electrical components.

• Vehicle owners restoring and maintaining original-spec Lexus GS300 and IS250 models.

• Used-car export traders supplying pre-owned Lexus vehicles to global secondary markets.

• Hobbyists with lightly modified vehicles retaining factory-style electrical systems.

FAQ

Q: Which Lexus models does this alternator fit?
A: It fits Lexus GS300 and IS250 models with GR-series V6 engines (3GR-FSE / 3GR-FE / 4GR-FSE). Always verify against the OE number, pulley and mounting layout of your original alternator before ordering.

Q: Is this alternator rated 110A or 150A?
A: The listing title specifies 12V 150A, while the product attributes also state 110A. Confirm the amperage label on your original alternator before ordering.

Q: Is this a Denso-pattern alternator?
A: Yes. This unit matches the Denso-pattern charging system and carries the Denso numbers 104210-4670 / 104210-2050 together with Lexus / Toyota OE numbers 27060-31060 / 27060-31051.

Q: What is the normal charging voltage after installation?
A: With the engine running at idle, battery terminal voltage should read 13.8V-14.5V; at 2000 rpm the target stabilises around 14.0-14.7V.

Q: What is your warranty and lead-time?
A: Goods are in stock with a 10-day dispatch lead-time. A 1-year warranty applies from installation date; warranty excludes damage caused by mis-installation, wrong belt tension, or vehicle-wiring faults.

In Practice

For technicians working on Lexus GR-series V6 platforms: Before removing the existing alternator, perform charging-system diagnostics. Measure battery terminal running voltage with a multimeter. Weak batteries, corroded ground connections or a faulty main harness can mimic alternator failure symptoms. Always disconnect the battery negative terminal before commencing removal work.

Take photos of wiring connectors and bolt positions during disassembly to avoid mis-routing during reassembly. Observe correct belt tension: 10-15 mm deflection when pressing the belt mid-span. Over-tightened belts accelerate alternator bearing wear; loose tension creates slipping and insufficient charging. Torque mounting bolts to Lexus workshop-manual specifications.

Inexperienced home mechanics are recommended to entrust replacement work to a qualified auto-electric repair shop. Incorrect wiring risks burning the alternator or vehicle-system components.

References

Vehicle applications are compiled from the original equipment fitment data for the 104210-467-series alternator family covering the Lexus GS300 and IS250 with GR-series V6 petrol engines, verified against actual vehicle installation tests and after-sales maintenance experience.

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