Denso Alternator 12V 50A New Single Leg 9791211-858DD

This Denso alternator is a new 12V, 50A unit with part number 9791211-858DD. It is listed as a single-leg mount alternator with an internal regulator, a 74mm pulley outside diameter, and a pulley section of A, so those details are worth checking against the original unit before ordering.

The mounting measurements supplied for this alternator are a 58mm mount leg thickness, 164mm mount centre to centre, a 10mm pivot hole diameter, and an M8x1.25 adjusting hole. At 3.32kg, it is a compact and lightweight unit designed for Denso applications where the fitment points and pulley arrangement need to match closely.

It is supplied new, not remanufactured, and carries a one-year warranty. The product note also states it has a non-active L lamp terminal, some applications may need the original pulley, and the shaft diameter should be checked, with an adaptor listed to suit HXK-30, HXK-22, and HXK-17.

Key Features

• New Denso alternator, not remanufactured
• 12V system with 50A power rating
• Single-leg alternator mount
• Internal regulator
• 74mm pulley outside diameter
• Non-active L lamp terminal

Specifications

• Brand: Denso
• Part No.: 9791211-858DD
• Voltage: 12V
• Amperage: 50A
• Type: Alternator
• Unit of measure: Each
• Mount leg thickness: 58mm
• Pivot hole diameter: 10mm

Fitment guidance

• Listed fitment includes Toyota Industrial and Toyota Industrial Forklift applications.
• Sample applications shown include Toyota Industrial Forklift and Toyota Industrial Forklift 1994.

Application and Buying Notes

Before purchasing, compare the part number 9791211-858DD, the 12V 50A rating, and the single-leg mounting measurements against the unit being replaced. The key match points here are the 58mm mount leg thickness, 164mm mount centre to centre, 10mm pivot hole, and M8x1.25 adjusting hole.

Check the pulley details carefully as the alternator is listed with a 74mm outside diameter and A-section pulley. The notes advise that some applications may need the original pulley, and that shaft diameter should be checked, so pulley and shaft compatibility should be verified before the unit is fitted.

The internal regulator and non-active L lamp terminal are important electrical details. If the original unit used a different lamp terminal arrangement or an external regulator setup, that difference needs to be accounted for during comparison. The listed adaptor suitability for HXK-30, HXK-22, and HXK-17 may also be relevant where the application requires it.

This alternator is shown for Toyota Industrial and Toyota Industrial Forklift applications, including a 1994 forklift listing in the sample applications. Even so, industrial equipment can vary by build, so matching by measurements and part number remains the safest way to avoid a mismatch.

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 9791211-858DD 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 One Year, Mount Leg Thickness 58mm, Pivot Hole Diameter 10, Pulley Outside Diameter 74mm, Regulator Type Internal, Voltage 12, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. 9791211-858DD, Brand DENSO, Description Denso Alternator 12V 50A, Adjusting Hole Diameter M8x1.25, Pin Code IR11, Power Rating (Amp) 50, Pulley Section A, Suits Unit Make Denso.

Denso Alternator 12V 50A. Part number 9791211-858DD should be checked first. Listed voltage is 12. Listed output rating is 50. These details form the core reference points used by parts interpreters when confirming the correct replacement.

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

For part number 9791211-858DD, 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 50 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching part number 9791211-858DD, the 12V 50A specification, the single-leg mounting dimensions, and the pulley and shaft details against the original alternator before ordering.

FAQ

Is this alternator new or remanufactured?

This unit is listed as new, not remanufactured. For this listing, part number 9791211-858DD is the main reference point. Listed voltage is 12. Listed output rating is 50. Published fitment references include TOYOTA INDUSTRIAL FORKLIFT, TOYOTA INDUSTRIAL FORKLIFT 1994. 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 50A power rating. For this listing, part number 9791211-858DD is the main reference point. Listed voltage is 12. Listed output rating is 50. Published fitment references include TOYOTA INDUSTRIAL FORKLIFT, TOYOTA INDUSTRIAL FORKLIFT 1994. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It has an internal regulator. For this listing, part number 9791211-858DD is the main reference point. Listed voltage is 12. Listed output rating is 50. Published fitment references include TOYOTA INDUSTRIAL FORKLIFT, TOYOTA INDUSTRIAL FORKLIFT 1994. These details should still be checked against the original unit before ordering.

What are the main mounting measurements?

The listed mounting details are 58mm mount leg thickness, 164mm mount centre to centre, 10mm pivot hole diameter, and M8x1.25 adjusting hole diameter. For this listing, part number 9791211-858DD is the main reference point. Listed voltage is 12. Listed output rating is 50. Published fitment references include TOYOTA INDUSTRIAL FORKLIFT, TOYOTA INDUSTRIAL FORKLIFT 1994. These details should still be checked against the original unit before ordering.

Does it use a standard lamp terminal?

The note says it has a non-active L lamp terminal, so the lamp terminal arrangement should be checked against the original unit. For this listing, part number 9791211-858DD is the main reference point. Listed voltage is 12. Listed output rating is 50. Published fitment references include TOYOTA INDUSTRIAL FORKLIFT, TOYOTA INDUSTRIAL FORKLIFT 1994. These details should still be checked against the original unit before ordering.

What vehicles or equipment is it shown for?

Fitment is shown for Toyota Industrial and Toyota Industrial Forklift applications, with sample applications including Toyota Industrial Forklift and Toyota Industrial Forklift 1994. For this listing, part number 9791211-858DD is the main reference point. Listed voltage is 12. Listed output rating is 50. Published fitment references include TOYOTA INDUSTRIAL FORKLIFT, TOYOTA INDUSTRIAL FORKLIFT 1994. These details should still be checked against the original unit before ordering.