OEX Alternator 12V 80A Bosch Style BXA057

The OEX Alternator BXA057 is a new 12V 80A unit built in Bosch style, with a 6 groove pulley and internal regulator. It suits Bosch applications and uses a twin leg alternator mount, so it is important to match the mounting layout and pulley setup before ordering.

Key measurements on this alternator include a 168mm mount centre-to-centre, 41mm inside mounting legs, an M10x1.25 / 10.5 pivot hole diameter, and an M8x1.25 adjusting hole diameter. Those dimensions are the practical checks that help confirm the unit will physically line up in the vehicle.

This alternator is listed as part number BXA057, weighs 5.7kg, and is supplied new rather than remanufactured. It carries a 3 year passenger / 1 year commercial warranty, which gives a useful reference point for buyers comparing replacement options in the rotating electrical range.

Key Features

• New OEX alternator
• 12V, 80A output
• Bosch style unit
• Internal regulator
• 6 groove pulley
• Twin leg alternator mount

Specifications

• Part No.: BXA057
• Brand: OEX
• Type: Alternator
• Voltage: 12V
• Power rating: 80A
• Pulley outside diameter: 55mm
• Pulley section: 6 groove
• Mount centre to centre: 168mm

Fitment guidance

• Fits Bosch-style applications where the 12V 80A specification matches the vehicle requirement.
• Fitment references include Lotus Elise and Toyota models such as Celica, Corolla and MR2.
• Listed application samples include Lotus Elise 2003, 2004, 2005 and 2006.
• Listed application samples include Toyota Celica 1999 through 2006.
• Listed application samples include Toyota Corolla 2001, 2002 and additional Corolla listings.
• Fitment must still be checked against the part number, mount type and pulley details before purchase.

Application and Buying Notes

When replacing an alternator like this 12V 80A Bosch style unit, the safest approach is to check the part number BXA057 first, then compare the mount layout and pulley arrangement on the vehicle. The twin leg mount, 168mm centre-to-centre measurement and 6 groove pulley are all practical identifiers that need to line up with the existing unit.

The internal regulator is another important detail. If the vehicle is set up for an externally regulated alternator, this unit will not be the correct match. The 55mm pulley outside diameter and the M10x1.25 / 10.5 pivot hole diameter are also worth confirming, because small differences there can prevent correct installation even when the electrical rating appears similar.

This alternator is rated at 12V and 80A, so it should only be considered where that output specification is appropriate for the application. Buyers should also allow for the unit’s 5.7kg weight when comparing replacement parts, as a physical comparison with the removed alternator can help identify whether the housing and mounting style are the same.

The warranty is 3 years for passenger use and 1 year for commercial use, which is useful context when selecting between new rotating electrical parts. That said, warranty cover does not confirm fitment, so the vehicle’s application details, mount type and pulley section still need to be checked 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 BXA057 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 41mm, Pivot Hole Diameter M10x1.25 / 10.5, Pulley Outside Diameter 55mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 168mm, Weight 5.7kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. BXA057, Brand OEX, Description OEX Alternator 12V 80A Bosch Style, Adjusting Hole Diameter M8x1.25, Pin Code IR115, Power Rating (Amp) 80, Pulley Section 6 Groove, Suits Unit Make Bosch, Alternator Mount Twin Leg.

OEX Alternator 12V 80A Bosch Style. Part number BXA057 should be checked first. Listed voltage is 12. Listed output rating is 80. 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 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number BXA057, 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 80 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include LOTUS ELISE, LOTUS ELISE 2003, LOTUS ELISE 2004, LOTUS ELISE 2005, TOYOTA CELICA, TOYOTA CELICA 1999. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm compatibility by matching part number BXA057, 12V 80A output, Bosch style application, twin leg mount, 6 groove pulley and the listed mounting measurements against the vehicle before ordering.

FAQ

What is the part number for this alternator?

The part number is BXA057.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output does it have?

It is a 12V alternator with an 80A power rating.

What type of regulator does it use?

It has an internal regulator.

What pulley setup does it use?

It has a 55mm pulley outside diameter and a 6 groove pulley section.

What should I check before buying?

Check the part number BXA057, Bosch-style application, twin leg mount, 168mm mount centre-to-centre, 41mm inside mounting legs, and the pivot and adjusting hole sizes against the existing alternator.