Bosch Alternator 12V 70A BXH1226N | Hitachi Mount, Internal Regulator

The Bosch BXH1226N is a new 12V alternator rated at 70A, supplied as an each unit for rotating electrical applications. It is designed with a twin leg alternator mount, 5 groove pulley section, and clockwise rotation, so the physical layout and drive configuration can be checked against the vehicle before ordering.

This alternator uses an internal regulator and is listed with a Pin Code of IR4. The pulley outside diameter is 59mm, the inside mounting legs measure 81mm, and the mount centre to centre is 175mm. Those dimensions are useful when confirming that the alternator will sit and align correctly in the existing bracket arrangement.

The unit is specified as suitable for Hitachi applications and is new rather than remanufactured. Bosch identifies the part number as BXH1226N, and the unit carries a one year warranty. If you are replacing an existing alternator, matching the part number, mount style, pulley section, and electrical rating is the safest way to approach the purchase.

Key Features

• 12V alternator with 70A output
• Bosch part number BXH1226N
• New unit with one year warranty
• Internal regulator type
• Twin leg alternator mount
• 5 groove pulley section

Specifications

• Voltage: 12V
• Power rating: 70A
• Part No.: BXH1226N
• Pin Code: IR4
• Pulley outside diameter: 59mm
• Pulley section: 5 groove
• Rotation: CW
• Alternator mount: Twin leg

Application and Buying Notes

Before ordering, compare BXH1226N with the alternator already fitted to the vehicle. The important checkpoints here are 12V, 70A output, twin leg mounting, 5 groove pulley section, and clockwise rotation. If any of those details differ from the existing unit, the replacement may not match physically or electrically.

The Hitachi unit make note is important, but it should be treated as part of the identification process rather than a standalone guarantee. Check the mount centre to centre measurement of 175mm, the inside mounting legs measurement of 81mm, and the 59mm pulley outside diameter to make sure the housing and pulley arrangement are compatible with the existing installation.

This alternator is listed with an internal regulator and Pin Code IR4. Those details matter when verifying the charging system configuration, particularly if the current alternator uses a different regulator arrangement or connector style. Using the part number BXH1226N alongside the physical measurements is the most reliable way to confirm you are choosing the correct replacement.

If you are unsure, compare the old unit directly or check the vehicle application details before purchase. Alternators can look similar while differing in mount style, pulley section, regulator type, or rotation, so it is worth confirming every visible and listed identifier rather than relying on appearance alone.

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 BXH1226N 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, Pin Code IR4, Pulley Outside Diameter 59mm, Regulator Type Internal, Suits Unit Make Hitachi, Alternator Mount Twin Leg, New / Reman. New, Product Group 1 ROTATING ELECTRICAL.

Additional published details for cross-checking include Part No. BXH1226N, Brand BOSCH, Description Bosch Alternator 12V 70A, Inside Mounting Legs 81mm, Power Rating (Amp) 70, Pulley Section 5 Groove, Rotation CW, Voltage 12, Mount Cnt to Cnt 175mm.

Bosch Alternator 12V 70A. Part number BXH1226N 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 Twin 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.

For part number BXH1226N, 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 70 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment using part number BXH1226N, the 12V 70A rating, twin leg mount, 5 groove pulley, CW rotation, and the listed measurements before ordering.

FAQ

What is the part number for this Bosch alternator?

The part number is BXH1226N. For this listing, part number BXH1226N is the main reference point. Listed voltage is 12. Listed output rating is 70. These details should still be checked against the original unit before ordering.

What voltage and output does this alternator have?

It is a 12V alternator rated at 70A. For this listing, part number BXH1226N is the main reference point. Listed voltage is 12. Listed output rating is 70. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

It is listed as new. For this listing, part number BXH1226N is the main reference point. Listed voltage is 12. Listed output rating is 70. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number BXH1226N is the main reference point. Listed voltage is 12. Listed output rating is 70. These details should still be checked against the original unit before ordering.

What mounting and pulley details are listed?

It has a twin leg alternator mount, a 5 groove pulley section, a 59mm pulley outside diameter, 81mm inside mounting legs, and 175mm mount centre to centre. For this listing, part number BXH1226N is the main reference point. Listed voltage is 12. Listed output rating is 70. These details should still be checked against the original unit before ordering.

Does the listing show vehicle fitment applications?

No fitment applications are provided here, so confirmation should be made using the part number BXH1226N and the listed specifications before purchase. For this listing, part number BXH1226N is the main reference point. Listed voltage is 12. Listed output rating is 70. These details should still be checked against the original unit before ordering.