OEX Alternator 12V 145A Delco Style DXA9107

The OEX Alternator DXA9107 is a new 12V, 145A alternator in Delco style, built for applications that suit a Delco unit and the 21SI series. It is a twin leg mount design with an internal regulator, and the key mounting dimensions are 101mm inside mounting legs, 198mm mount centre to centre, and a 13mm pivot hole.

This unit is identified with part number DXA9107 and pin code IR209. It uses a 22mm shaft diameter, a 1/2 UNC adjusting hole, and weighs 6.96kg. For buyers comparing replacement alternators, those dimensions are just as important as the amperage rating because the physical mount and shaft setup must line up with the vehicle application.

OEX lists this alternator as a new rotating electrical unit with a 3 year passenger and 1 year commercial warranty. It is part of the OEX alternator range, which is supplied for aftermarket replacement work where the correct fit, output rating, and mounting pattern need to match the original unit closely.

Key Features

• 12V alternator with 145A output
• Delco style, 21SI series
• Internal regulator
• Twin leg mount
• New unit, not remanufactured
• Part number DXA9107

Specifications

• Voltage: 12V
• Power rating: 145A
• Series: 21SI
• Regulator type: Internal
• Alternator mount: Twin Leg
• Inside mounting legs: 101mm
• Mount centre to centre: 198mm
• Pivot hole diameter: 13mm

Confirmed fitment guidance

• Suits unit make: Delco
• Fitment is listed across a wide range of heavy-duty, agricultural, and commercial applications
• Application families shown include AGCO Allis, Case, Caterpillar, Cummins, Detroit Diesel, Ford, Freightliner, International, Iveco, John Deere, Kenworth, Mack, New Holland, and others
• Sample applications listed include AGCO Allis 9695 and 9815, Case 9050B and 921, Caterpillar 120K, 120M, 12H, 12K, 140K, 160K, Cummins C8.3-C and L10, Ford 900-Series and Cargo, Kenworth C-Series, K-Series, L-Series, T-Series and W-Series, and John Deere 624G and 644E
• Fitment should still be checked against the original alternator part number, mount style, shaft size, and dimensions before ordering

Application and Buying Notes

For a replacement alternator, the best starting point is the part number DXA9107 and the Delco 21SI style listed here. The unit is 12V with a 145A power rating, so it is intended for systems designed around that voltage and output level. If the existing alternator differs in output, regulator type, or case style, the physical unit may not be the same even if it appears similar at first glance.

The mounting measurements matter on this unit. The inside mounting legs are 101mm, the mount centre to centre is 198mm, the pivot hole is 13mm, and the adjusting hole is 1/2 UNC. These figures should be checked against the original alternator or the vehicle’s existing bracket arrangement before purchase, especially on equipment where access and bracket alignment are tight.

The shaft diameter is 22mm, which is another important check point when replacing a Delco-style alternator. If the pulley, bracket, or mounting arrangement on the vehicle was matched to a different shaft size or case configuration, the part may not interchange cleanly. The listed weight of 6.96kg also gives a useful reference when comparing the replacement to the removed unit.

This alternator is listed as new and carries an internal regulator. That makes it important to confirm the original electrical setup rather than assuming every Delco-style unit uses the same regulation arrangement. Where the original unit has different wiring, plug, or control requirements, the part number and application details should be matched carefully before fitting.

The application coverage shown includes a broad mix of machinery and trucks, including Caterpillar, Cummins, Ford, Freightliner, International, John Deere, Kenworth, Mack, and New Holland models. That range is helpful, but it is not a substitute for checking the exact model, series, and original alternator details on the machine. A parts advisor would normally confirm the old unit, mounting face, and connector style before supply.

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 DXA9107 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 3yr Passenger 1yr Commercial, Inside Mounting Legs 101mm, Pivot Hole Diameter 13, Regulator Type Internal, Shaft Diameter 22mm, Voltage 12, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Weight 6.96kg, Product Group 1 ROTATING ELECTRICAL, Part No. DXA9107, Brand OEX, Description OEX Alternator 12V 145A Delco Style, Adjusting Hole Diameter 1/2 UNC, Pin Code IR209, Power Rating (Amp) 145, Series 21SI, Suits Unit Make Delco.

OEX Alternator 12V 145A Delco Style. Part number DXA9107 should be checked first. Listed voltage is 12. Listed output rating is 145. 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. 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 DXA9107, Delco suitability, the 21SI series, and the listed mounting dimensions before ordering. Always compare the original alternator’s voltage, amperage, regulator type, shaft size, and bracket arrangement to the specifications shown here.

FAQ

What voltage is this alternator?

It is a 12V alternator.

What is the output rating?

The listed power rating is 145A.

What series is it?

It is listed as a 21SI series alternator.

Does it use an internal regulator?

Yes. The regulator type is listed as internal.

What is the part number?

The part number is DXA9107.

Is fitment limited to one vehicle make?

No. It is listed for Delco units across a wide range of agricultural, commercial, and heavy-duty applications, but the exact vehicle should still be checked against the part number and mounting dimensions.