Bosch Alternator 12V 70A BXT1250A

This Bosch alternator is a 12V, 70A unit supplied new, with part number BXT1250A. It uses an internal regulator, a 5 groove pulley, and a single leg alternator mount, so it is the sort of unit that needs to be matched carefully to the existing mounting and charging layout before purchase.

Key dimensions include a 58mm mount leg thickness, 160mm mount centre to centre, a 10mm pivot hole diameter, an M8 x 1.25 adjusting hole diameter, and a 67mm pulley outside diameter. Those measurements matter as much as the electrical rating when you are checking replacement alternators for a direct swap.

The unit is listed as Bosch brand, new, and carries a one year warranty. It weighs 9.21kg and is described as part of the rotating electrical group, which is useful when comparing it with the alternator already fitted to the vehicle or with other Bosch applications.

Fitment data supplied for this part includes Ford Courier, Holden Apollo, and Toyota models including Camry, Corolla, Corona and Spacia. The application list is the best starting point, but the part number BXT1250A and the mounting and pulley details should still be confirmed against the vehicle before ordering.

Key Features

• Bosch alternator, 12V 70A output
• New unit with internal regulator
• 5 groove pulley
• Single leg alternator mount
• Part number BXT1250A
• One year warranty

Specifications

• Voltage: 12V
• Power rating: 70A
• Regulator type: Internal
• Pulley outside diameter: 67mm
• Pulley section: 5 groove
• Alternator mount: Single leg
• Mount leg thickness: 58mm
• Mount centre to centre: 160mm

Known application groups

• Ford Courier
• Holden Apollo
• Toyota Camry
• Toyota Corolla
• Toyota Corona
• Toyota Spacia

Application and Buying Notes

When replacing an alternator, the safest check is the part number first, followed by the physical mounting pattern and pulley layout. This unit is identified as BXT1250A, with a 12V system, 70A output, internal regulator, single leg mount, and a 5 groove pulley, so those details should be compared with the existing alternator before fitment is assumed.

The mounting dimensions are specific enough to matter: 58mm mount leg thickness, 160mm mount centre to centre, 10mm pivot hole diameter, and M8 x 1.25 adjusting hole diameter. If any of those points do not match the vehicle or bracket setup, the alternator may not install correctly even if the application name looks close.

The supplied applications cover Ford Courier, Holden Apollo, and Toyota Camry, Corolla, Corona and Spacia. That is helpful for narrowing the search, but it does not replace a physical check of the old unit. Always compare the old alternator’s regulator type, pulley section, and mounting style with this Bosch unit before ordering.

A 70A alternator may suit many charging system setups, but current output is only one part of the replacement decision. Belt alignment, pulley groove count, terminal arrangement, and the available mounting space all need to be checked, especially where the vehicle has been modified or where the original unit has been replaced previously.

Because this is a new alternator with a one year warranty, it is still important to confirm the vehicle details before installation. The listed 9.21kg weight, Bosch branding, and BXT1250A part number give you solid reference points when matching the replacement to the old part or to workshop records.

If you are comparing alternatives, use the part number and the mounting measurements together rather than relying on description alone. Alternators can share a similar appearance while differing in regulator type, pulley section, or hole spacing, and those differences can affect installation and charging system compatibility.

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 BXT1250A 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 67mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 160mm, Weight 9.21kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. BXT1250A, Brand BOSCH, Description Bosch Alternator 12V 70A, Adjusting Hole Diameter M8 x 1.25, Pin Code IR110, Power Rating (Amp) 70, Pulley Section 5 Groove, Suits Unit Make Bosch, Alternator Mount Single Leg.

Bosch Alternator 12V 70A. Part number BXT1250A should be checked first. Listed voltage is 12. Listed output rating is 70. 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 5 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

Compatibility note: Please confirm fitment using part number BXT1250A, the 12V 70A specification, and the mounting and pulley measurements before purchase. Application names are a guide only, and the final check should always be against the vehicle and the existing alternator.

FAQ

Is this alternator new or remanufactured?

This Bosch alternator is listed as new.

What is the part number for this alternator?

The part number is BXT1250A.

What charging output does it have?

It is rated at 70A and uses a 12V system.

What type of regulator does it use?

It has an internal regulator.

What pulley and mount details are listed?

It has a 5 groove pulley, a 67mm pulley outside diameter, and a single leg alternator mount. The listed mount measurements are 58mm mount leg thickness, 160mm mount centre to centre, a 10mm pivot hole diameter, and an M8 x 1.25 adjusting hole diameter.

Which vehicle groups are listed in the fitment data?

The supplied fitment groups include Ford Courier, Holden Apollo, and Toyota Camry, Corolla, Corona and Spacia. You should still confirm the part number and physical measurements before ordering.