Mitsubishi Alternator 12V 90A 1800A111

This Mitsubishi alternator is a 12V, 90A unit supplied new as an OE product, with part number 1800A111. It is listed with an internal regulator, a 4 groove pulley, and a twin leg alternator mount, so the mounting style and electrical layout need to match the vehicle before purchase.

Key physical details include 78mm inside mounting legs, 175mm mount centre-to-centre, and an M8 x 1.25 adjusting hole diameter. Those dimensions are useful when checking bracket alignment and installation clearance, especially where the original alternator has the same twin leg arrangement.

The unit is identified as Pin Code IR70 and is supplied as one each. The warranty is stated as 2 years or 400,000km, which gives a clear service-life reference, but fitment should still be confirmed against the part number 1800A111 and the vehicle application details before ordering.

Key Features

• OE product
• New alternator
• Internal regulator
• 12V system
• 90A output
• 4 groove pulley

Specifications

• Brand: Mitsubishi
• Product type: Alternator
• Voltage: 12V
• Current output: 90A
• Part No.: 1800A111
• Regulator type: Internal
• Pulley section: 4 groove
• Alternator mount: Twin leg

Fitment guidance

• Supplied fitment information references Mitsubishi and Mitsubishi Triton applications.
• Fitment samples include Mitsubishi Triton 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 and 2015.
• Confirm the original alternator part number 1800A111 where applicable.
• Check that the vehicle uses a 12V, 90A alternator with an internal regulator and twin leg mounting style.
• Verify the pulley has 4 grooves and the mounting dimensions match 78mm inside mounting legs and 175mm mount centre-to-centre.

Application and Buying Notes

Before ordering, compare the existing alternator against the listed details: 12V, 90A, internal regulator, twin leg mount, 4 groove pulley, and part number 1800A111. Those items are the most reliable checks because alternators can look similar while differing in regulator type, pulley section, or mounting dimensions.

The mounting measurements are particularly important here. An inside mounting leg width of 78mm, mount centre-to-centre of 175mm, and M8 x 1.25 adjusting hole diameter must suit the vehicle bracket and adjustment setup. If any of these points differ from the original unit, the alternator may not install correctly even if the connector or casing appears close.

This unit is listed as an OE product and new, with a warranty of 2 years or 400,000km. That gives a clear reference for replacement work, but it should not replace a direct comparison with the removed alternator. The safest approach is to match the part number, confirm the pulley groove count, and check the mounting pattern before purchase.

If you are fitting to a Mitsubishi Triton application, use the model year as a starting point only and still verify the actual alternator fitted to the vehicle. Alternator variations can occur across build dates and engine combinations, so the practical check is always the physical unit and the recorded part number rather than the model badge alone.

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 1800A111 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 2 Years 400,000km, Inside Mounting Legs 78mm, Power Rating (Amp) 90, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 175mm, Product Group 2 ALTERNATORS.

Additional published details for cross-checking include Part No. 1800A111, Brand MITSUBISHI, Description Mitsubishi Alternator 12V 90A, Adjusting Hole Diameter M8x 1.25, Pin Code IR70, Pulley Section 4 Groove, Suits Unit Make Mitsubishi, Alternator Mount Twin Leg, New / Reman. New, Product Group 1 ROTATING ELECTRICAL.

Mitsubishi Alternator 12V 90A. Part number 1800A111 should be checked first. Listed voltage is 12. Listed output rating is 90. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. Regulator type is Internal. Pulley configuration is 4 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 1800A111, 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 90 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching part number 1800A111, 12V 90A output, internal regulator, 4 groove pulley, and the 78mm / 175mm mounting dimensions against the vehicle’s existing alternator and application details.

FAQ

What is the part number for this alternator?

The part number is 1800A111. For this listing, part number 1800A111 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MITSUBISHI TRITON, MITSUBISHI TRITON 2005, MITSUBISHI TRITON 2006. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is listed as new. For this listing, part number 1800A111 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MITSUBISHI TRITON, MITSUBISHI TRITON 2005, MITSUBISHI TRITON 2006. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 90A power rating. For this listing, part number 1800A111 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MITSUBISHI TRITON, MITSUBISHI TRITON 2005, MITSUBISHI TRITON 2006. These details should still be checked against the original unit before ordering.

Does it have an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number 1800A111 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MITSUBISHI TRITON, MITSUBISHI TRITON 2005, MITSUBISHI TRITON 2006. These details should still be checked against the original unit before ordering.

What pulley type does it use?

It uses a 4 groove pulley section. For this listing, part number 1800A111 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MITSUBISHI TRITON, MITSUBISHI TRITON 2005, MITSUBISHI TRITON 2006. These details should still be checked against the original unit before ordering.

What should I check before ordering?

Confirm the part number 1800A111, the 12V 90A rating, internal regulator, twin leg mount, 78mm inside mounting legs, and 175mm mount centre-to-centre against the vehicle’s existing alternator. For this listing, part number 1800A111 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MITSUBISHI TRITON, MITSUBISHI TRITON 2005, MITSUBISHI TRITON 2006. These details should still be checked against the original unit before ordering.