Genuine Products Alternator 12V 100A Mitsubishi PA5J18300

This Genuine Products alternator is a new 12V unit with a 100A power rating, supplied as part number PA5J18300. It is listed for Mitsubishi applications and uses an internal regulator, so it is important to match the part number and mounting details before ordering.

The alternator is built with a quad leg mount, a 10 / M10x1.25 pivot hole diameter, and 134mm mount centre-to-centre spacing. It also has a 6 groove pulley with a 51mm outside diameter, which are the kind of details that matter when checking physical fitment against the existing unit.

At 5.24kg, this is a new replacement alternator rather than a remanufactured unit. The listed warranty is 12 months, giving you a clear reference point for coverage when the part is installed and used within its intended application.

Key Features

• New alternator, not remanufactured
• 12V system voltage
• 100A power rating
• Internal regulator
• 6 groove pulley
• OE manufacturer supply

Specifications

• Brand: Genuine Products
• Part No.: PA5J18300
• Description: Genuine Alternator 12V 100A Mitsubishi
• Voltage: 12V
• Power Rating: 100A
• Regulator Type: Internal
• Pulley Section: 6 groove
• Pulley Outside Diameter: 51mm

Fitment guidance

• MAZDA: 3, 3 2018, CX-5, CX-5 2016, CX-5 2018

Application and Buying Notes

Before buying, compare part number PA5J18300 with the alternator already fitted to the vehicle. The physical mounting pattern matters as much as the electrical rating, especially with the quad leg mount, 134mm mount centre-to-centre measurement, and 10 / M10x1.25 pivot hole diameter.

The 12V, 100A specification tells you the charging output level and system voltage, but it does not by itself confirm fitment. You should also check the pulley setup, because this unit uses a 6 groove pulley with a 51mm outside diameter.

An internal regulator is listed, so the replacement should match the vehicle’s charging system arrangement. If the original alternator differs in mount style, pulley section, or regulator type, do not assume it will interchange without checking the application details carefully.

This alternator is described as a new unit and carries a 12 month warranty. That gives a straightforward comparison point when deciding between new and used or remanufactured parts, but the correct application still needs to be confirmed before installation.

The product is identified as suitable for Mitsubishi units, but no model-specific fitment should be assumed beyond what is listed here. Use the part number, voltage, amperage, mount pattern, and pulley measurements together to verify it against the vehicle or the removed alternator.

If you are fitting to a vehicle with charging faults, make sure the issue is not elsewhere in the system before replacing the alternator. Belt condition, wiring, battery state, and charge circuit health all need to be checked alongside the replacement part details.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number PA5J18300 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type ALTERNATOR, Unit of Measure EACH, Warranty 12 Months, Pivot Hole Diameter 10 / M10x1.25, Pulley Outside Diameter 51mm, Regulator Type Internal, Voltage 12, Item Type Alternator, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. PA5J18300, Brand GENUINE PRODUCTS, Description Genuine Alternator 12V 100A Mitsubishi, Pin Code IR140, Power Rating (Amp) 100, Pulley Section 6 Groove, Suits Unit Make Mitsubishi, Alternator Mount Quad Leg, Mount Cnt to Cnt 134mm.

Genuine Alternator 12V 100A Mitsubishi. Part number PA5J18300 should be checked first. Listed voltage is 12. Listed output rating is 100. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Quad Leg. Regulator type is Internal. Pulley configuration is 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

Compatibility note: Confirm compatibility using part number PA5J18300 and the listed application details, including 12V, 100A, internal regulator, quad leg mount, 134mm mount centre-to-centre, and 6 groove pulley with 51mm outside diameter. Do not rely on vehicle name alone when checking fitment.

FAQ

Is this alternator new or remanufactured?

It is listed as new, not remanufactured. For this listing, part number PA5J18300 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2018, MAZDA CX-5. These details should still be checked against the original unit before ordering.

What is the voltage and output rating?

The alternator is 12V with a 100A power rating. For this listing, part number PA5J18300 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2018, MAZDA CX-5. These details should still be checked against the original unit before ordering.

What regulator type does it use?

It uses an internal regulator. For this listing, part number PA5J18300 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2018, MAZDA CX-5. These details should still be checked against the original unit before ordering.

What mounting details are provided?

The alternator has a quad leg mount, a 10 / M10x1.25 pivot hole diameter, and 134mm mount centre-to-centre spacing. For this listing, part number PA5J18300 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2018, MAZDA CX-5. These details should still be checked against the original unit before ordering.

What pulley details are listed?

It has a 6 groove pulley with a 51mm outside diameter. For this listing, part number PA5J18300 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2018, MAZDA CX-5. These details should still be checked against the original unit before ordering.

What warranty is supplied?

The listed warranty is 12 months. For this listing, part number PA5J18300 is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA 3, MAZDA 3 2018, MAZDA CX-5. These details should still be checked against the original unit before ordering.