Genuine Alternator 12V 100A Mitsubishi P31H18300B

Genuine Alternator 12V 100A Mitsubishi, part number P31H18300B, is a new rotating electrical unit supplied under the Genuine Products brand. It is a 12-volt alternator with a 100 amp power rating, an internal regulator, and a 6 groove pulley section.

This alternator is listed with a quad leg alternator mount, a pivot hole diameter of 10 / M10x1.25, and a pulley outside diameter of 51mm. Those mounting and drive details matter when matching the unit to the vehicle, because the physical fit must suit the brackets, pulley alignment, and belt setup already on the car.

The unit is described as suitable for Mitsubishi applications, and the fitment information provided includes Mazda CX-5 references as well. That mixed application data means the safest buying approach is to confirm the part number, mounting style, pulley configuration, and vehicle application before ordering.

It carries a 12 month warranty and is supplied as each. At 5.24kg, it is a substantial alternator assembly, so checking the existing unit against the listed specifications is worthwhile before fitting or dispatching the replacement.

Key Features

• Genuine Products alternator
• 12V, 100A output
• Internal regulator
• 6 groove pulley section
• Quad leg alternator mount
• New unit

Specifications

• Voltage: 12V
• Power rating: 100A
• Pulley outside diameter: 51mm
• Pulley section: 6 groove
• Pivot hole diameter: 10 / M10x1.25
• Alternator mount: Quad leg
• Regulator type: Internal
• Weight: 5.24kg

Fitment information

• Suits unit make: Mitsubishi
• Fitment data also references Mazda and Mazda CX-5 applications
• Sample application listed: Mazda CX-5
• Sample application listed: Mazda CX-5 2016

Application and Buying Notes

When ordering an alternator, the most reliable match is the part number and the physical specification set. This unit is identified as P31H18300B and is a 12V 100A alternator with an internal regulator, so it should be checked against the vehicle’s existing alternator and charging system requirements before purchase.

The mount and drive details are especially important here. The quad leg alternator mount, 10 / M10x1.25 pivot hole diameter, 51mm pulley outside diameter, and 6 groove pulley section all need to align with the vehicle and belt arrangement. Even where the electrical rating is suitable, a mismatch in these dimensions can prevent proper installation.

Because the supplied application information includes Mitsubishi and also Mazda CX-5 references, it is sensible to verify the exact vehicle fitment rather than relying on the general make name alone. Matching by VIN, removed part number, and visual comparison to the old alternator is the best way to avoid ordering the wrong unit.

This alternator is new and carries a 12 month warranty, which gives a clear baseline for replacement planning. It is supplied individually as each, so you can compare the unit weight of 5.24kg and the mounting layout against the part being removed before fitting work begins.

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 P31H18300B 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, Weight 5.24kg, Product Group 1 ROTATING ELECTRICAL.

Additional published details for cross-checking include Part No. P31H18300B, 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, New / Reman. New.

Genuine Alternator 12V 100A Mitsubishi. Part number P31H18300B 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.

For part number P31H18300B, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a alternator in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 and output 100 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment with part number P31H18300B, the 12V 100A specification, the quad leg mount, and the 6 groove pulley arrangement before ordering. Vehicle applications should be checked carefully against the existing alternator and the vehicle’s charging system details.

FAQ

What is the part number for this alternator?

The part number listed is P31H18300B. For this listing, part number P31H18300B is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA CX-5, MAZDA CX-5 2016. These details should still be checked against the original unit before ordering.

What voltage and output does this alternator have?

It is a 12V alternator with a 100A power rating. For this listing, part number P31H18300B is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA CX-5, MAZDA CX-5 2016. These details should still be checked against the original unit before ordering.

Is this alternator new or reconditioned?

It is listed as new. For this listing, part number P31H18300B is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA CX-5, MAZDA CX-5 2016. 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 P31H18300B is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA CX-5, MAZDA CX-5 2016. These details should still be checked against the original unit before ordering.

What pulley and mounting details are listed?

The listed pulley section is 6 groove, the pulley outside diameter is 51mm, and the alternator mount is quad leg. For this listing, part number P31H18300B is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA CX-5, MAZDA CX-5 2016. These details should still be checked against the original unit before ordering.

What fitment information is provided?

The product is listed for Mitsubishi applications, and the fitment data also references Mazda CX-5, including a Mazda CX-5 2016 sample application. Confirm the exact fitment by part number and vehicle details before ordering. For this listing, part number P31H18300B is the main reference point. Listed voltage is 12. Listed output rating is 100. Published fitment references include MAZDA CX-5, MAZDA CX-5 2016. These details should still be checked against the original unit before ordering.