OEX Alternator 12V 130A Denso Style DXA591

The OEX Alternator DXA591 is a 12V, 130A unit built in a Denso style and supplied as a new alternator for rotating electrical applications. It uses an internal regulator, a 7 groove pulley, and a pad mount arrangement, so the physical mounting and drive setup need to match the vehicle’s existing unit before purchase.

This alternator is listed with OEM number 104210-3140 and suits Denso units. Key mounting measurements supplied are 123mm mount centre to centre, 45mm inside mounting legs, 35mm mount leg thickness, M8 x 1.25 adjusting hole diameter, and M10 pivot hole diameter. Those dimensions are the main checks to compare against the removed alternator.

OEX states its products are sourced from market leading original equipment manufacturers and aftermarket suppliers, with factories that are ISO9001 certified. The unit is covered by a 3 year passenger / 1 year commercial warranty, which gives a clear service benchmark for a 12V 130A alternator used in the correct application.

Key Features

• 12V alternator rated at 130 amps
• Denso style unit
• Internal regulator
• 7 groove pulley
• Pad mount alternator
• New unit, not remanufactured

Specifications

• Brand: OEX
• Part number: DXA591
• OEM number: 104210-3140
• Type: Alternator
• Voltage: 12V
• Power rating: 130A
• Regulator type: Internal
• Pulley section: 7 groove

Fitment guidance

• Toyota Alphard
• Toyota Alphard / Vellfire
• Toyota Avensis Verso
• Toyota RAV 4
• Toyota Tarago

Application and Buying Notes

Before ordering, compare the removed alternator with the OEX DXA591 and confirm the part number, 12V system voltage, 130A output, and Denso style design. The supplied fitment data includes Toyota Alphard, Alphard / Vellfire, Avensis Verso, RAV 4, and Tarago, but the exact application still needs to match the vehicle’s engine, bracket style, pulley alignment, and wiring arrangement.

The most useful physical checks are the 123mm mount centre to centre dimension, 45mm inside mounting legs, 35mm mount leg thickness, M8 x 1.25 adjusting hole, M10 pivot hole, and 7 groove pulley. If any of these points differ from the unit being replaced, the alternator may not bolt up or line up correctly even if the vehicle is one of the listed models.

Because this alternator is a Denso style unit with an internal regulator, it is important to verify the connector and charging system layout against the original part. The pin code is IR11, and the OEM number shown is 104210-3140, so matching those identifiers is one of the safest ways to narrow the application before fitting.

This unit is supplied new and weighs 6kg, which is useful when comparing it with the old alternator at the counter or on the bench. For commercial use, the warranty period is 1 year, while passenger use is covered for 3 years. Warranty terms do not replace fitment checks, so the vehicle and alternator details should still be confirmed carefully before installation.

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 DXA591 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 45mm, Pin Code IR11, Power Rating (Amp) 130, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 123mm, OEM Number 104210-3140.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. DXA591, Brand OEX, Description OEX Alternator 12V 130A Denso Style, Adjusting Hole Diameter M8 x 1.25, Mount Leg Thickness 35mm, Pivot Hole Diameter M10, Pulley Section 7 Groove, Suits Unit Make Denso.

OEX Alternator 12V 130A Denso Style. Part number DXA591 should be checked first. Listed voltage is 12. Listed output rating is 130. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. Regulator type is Internal. Pulley configuration is 7 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number DXA591, 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 130 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching the part number DXA591, OEM number 104210-3140, Denso style unit details, and all mounting and pulley measurements against the original alternator before purchase.

FAQ

What is the part number for this alternator?

The part number is DXA591. For this listing, part number DXA591 is the main reference point. Listed voltage is 12. Listed output rating is 130. Published fitment references include TOYOTA ALPHARD, TOYOTA ALPHARD / VELLFIRE, TOYOTA ALPHARD / VELLFIRE 2008. These details should still be checked against the original unit before ordering.

What voltage and amperage is the alternator?

It is a 12V alternator rated at 130A. For this listing, part number DXA591 is the main reference point. Listed voltage is 12. Listed output rating is 130. Published fitment references include TOYOTA ALPHARD, TOYOTA ALPHARD / VELLFIRE, TOYOTA ALPHARD / VELLFIRE 2008. These details should still be checked against the original unit before ordering.

Does this alternator use an internal regulator?

Yes. The regulator type is internal. For this listing, part number DXA591 is the main reference point. Listed voltage is 12. Listed output rating is 130. Published fitment references include TOYOTA ALPHARD, TOYOTA ALPHARD / VELLFIRE, TOYOTA ALPHARD / VELLFIRE 2008. These details should still be checked against the original unit before ordering.

What type of pulley does it have?

It has a 7 groove pulley. For this listing, part number DXA591 is the main reference point. Listed voltage is 12. Listed output rating is 130. Published fitment references include TOYOTA ALPHARD, TOYOTA ALPHARD / VELLFIRE, TOYOTA ALPHARD / VELLFIRE 2008. These details should still be checked against the original unit before ordering.

Which OEM number is listed for this part?

The listed OEM number is 104210-3140. For this listing, part number DXA591 is the main reference point. Listed voltage is 12. Listed output rating is 130. Published fitment references include TOYOTA ALPHARD, TOYOTA ALPHARD / VELLFIRE, TOYOTA ALPHARD / VELLFIRE 2008. These details should still be checked against the original unit before ordering.

What vehicle applications are listed?

The supplied fitment data includes Toyota Alphard, Toyota Alphard / Vellfire, Toyota Avensis Verso, Toyota RAV 4, and Toyota Tarago. Final fitment still needs to be confirmed against the original unit and vehicle details. For this listing, part number DXA591 is the main reference point. Listed voltage is 12. Listed output rating is 130. Published fitment references include TOYOTA ALPHARD, TOYOTA ALPHARD / VELLFIRE, TOYOTA ALPHARD / VELLFIRE 2008. These details should still be checked against the original unit before ordering.