Alternator 3730042011 12V 65A 1PK Hyundai H100 4D55

Product Overview

The 3730042011 is a Hyundai OE-spec replacement alternator delivering 12V output at 65A with a 1PK single-groove V-belt pulley, engineered for the Hyundai H100 (GRACE / PORTER family) with the 4D55 2.5-litre diesel engine. This brand-new aftermarket unit, identified by the JA1618IR and 0986080910 cross numbers, matches the original charging-system specification of this Korean light commercial platform.

Fitted with internal regulator design, this alternator is stocked in-house with a 1-year warranty and 10-day dispatch lead-time. The 65-amp rating supports the standard electrical load of these vans, including lighting, glow-plug circuit, climate control, powered accessories and battery charging.

Key physical specs: net weight 5.8 kg, gross weight 6.1 kg, overall dimensions 260 x 190 x 190 mm, supplied inside neutral kraft inner carton.

The Hyundai H100 4D55 Diesel Platform and 65A Charging System

The Hyundai H100 van and its GRACE / PORTER relatives use the 4D55 2.5-litre diesel engine of Mitsubishi-derived design. These commercial vehicles rely on a rugged alternator with a single-groove V-belt drive, sized for standard electrical load including diesel glow-plug operation.

This unit is specified as 12V 65A, matching the factory charging-system specification of these platforms. The 1PK single-groove pulley matches the original V-belt layout. Never replace a single-groove pulley unit with a 2PK, 4PK, 6PK or 7PK unit: the belt layouts are not interchangeable, and the wrong pulley will cause belt mis-tracking, slipping and charging faults. Always cross-check against your old alternator before ordering.

Technical Specifications

Engine Compatibility and Cross Reference

This alternator fits the following vehicles. Do not rely solely on the model name for fitment validation; always verify engine code, production year, old-part OE number, pulley type and amp label on your original alternator.

Multiple Hyundai 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, 3730042011 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 it is rated for 65A. Different amp ratings are not interchangeable.

• 2. Confirm the pulley: this unit uses a 1PK single-groove V-belt pulley. Units with 2PK, 4PK, 6PK or 7PK pulleys are not interchangeable with this drive layout.

• 3. Confirm the exact model (H100 / GRACE / PORTER), engine code (4D55 diesel) and production year of your vehicle.

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

• 5. Weight cross-check: genuine matching unit weighs approximately 5.8 kg net; significant weight difference indicates wrong assembly.

Application Scenarios

• Independent repair shops and commercial vehicle specialists servicing Hyundai H100 vans across Asia-Pacific, the Middle East, Africa, Europe and Latin-America.

• Parts counters and jobbers stocking Korean light commercial charging-system components.

• Fleet workshops maintaining H100 delivery and work fleets.

• Owners restoring and maintaining original-spec Hyundai diesel vans.

• Used-vehicle export traders supplying pre-owned Korean vans to global secondary markets.

FAQ

Q: Which vehicles does this alternator fit?
A: It fits the Hyundai H100 van and the GRACE / PORTER family with the 4D55 2.5-litre diesel engine. Always verify against the OE number, pulley and mounting layout of your original alternator before ordering.

Q: Is this alternator 1PK?
A: Yes. This unit uses a 1PK single-groove V-belt pulley. Multi-groove pulley units are not interchangeable with this drive layout.

Q: My old alternator shows OE number JA1618IR or 0986080910, will 3730042011 work?
A: Yes. These numbers belong to the same alternator family, differing only by production revision and market specification. It serves as a direct replacement.

Q: Why does the page list 4D55 as the part number?
A: 4D55 is the engine code of the vehicle application. Match the 37300-series OE numbers listed on your old alternator instead.

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 Hyundai H100 diesel vans: 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. Confirm the single-groove V-belt is correctly seated in the pulley groove and 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 Hyundai workshop-manual specifications.

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

References

Vehicle applications are compiled from the original equipment fitment data for the 3730042011 alternator family covering the Hyundai H100 / GRACE / PORTER 4D55 diesel platforms listed in the Engine Compatibility table, verified against actual installation tests and after-sales maintenance experience.

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