Bosch Alternator 24V 100A 1986A01059

This Bosch alternator is a 24V, 100A rotating electrical unit with part number 1986A01059. It is listed as an alternator type excl. vacuum pump, with a single leg mount, three-point mounting, and clockwise rotation. Those details matter when checking that the unit matches the vehicle’s mounting layout and charging system requirements.

The alternator uses an internal regulator and an 8 groove pulley with a 58mm outside diameter. It has a 10mm pivot hole diameter, 12mm adjusting hole diameter, and 159mm mount centre-to-centre measurement. For installations where the original unit differs in mounting style or pulley setup, these measurements are the practical checkpoints before ordering.

This unit is stated as suitable for Mercedes-Benz applications including Atego 2, Citaro (O 530) and Tourino (O 510). Because fitment can vary by vehicle build and electrical specification, confirm the part number 1986A01059 and compare the mounting and pulley details before fitting. The listed warranty is 12 months.

Bosch lists this alternator as made in Spain, with premium quality bearings and non-recycled copper components. It is sold each, weighs 7.56kg, and the packaging dimensions are 23.9 length, 20 height and 20 width. These details are useful when checking freight handling and ensuring the correct replacement is selected for the vehicle.

Key Features

• 24V alternator with 100A charge current
• Bosch part number 1986A01059
• Internal regulator
• Single leg mount with three-point mounting
• Clockwise rotation
• 8 groove pulley, 58mm outside diameter

Specifications

• Voltage: 24V
• Charge current / power rating: 100A
• Mount leg thickness: 80mm
• Pivot hole diameter: 10mm
• Adjusting hole diameter: 12mm
• Mount centre-to-centre: 159mm
• Pulley section: 8 groove
• Pulley outside diameter: 58mm

Fitment guidance

• Mercedes-Benz Atego 2
• Mercedes-Benz Citaro (O 530)
• Mercedes-Benz Tourino (O 510)

Application and Buying Notes

Before ordering, match the 24V system, 100A charge output, and Bosch part number 1986A01059 against the unit being replaced. The alternator is a single leg, three-point mount design with a 159mm mount centre-to-centre measurement, so the physical mount layout should be checked carefully rather than assuming interchangeability from appearance alone.

The pulley setup is another important check. This unit has an 8 groove pulley with a 58mm outside diameter and clockwise rotation. If the existing alternator uses a different groove count, pulley diameter, or rotation direction, it should not be treated as a direct match without further confirmation.

The alternator is listed with an internal regulator and as an alternator type excl. vacuum pump. That means the vehicle application needs to suit both the charging system design and the absence of a vacuum pump on the unit. The 10mm pivot hole and 12mm adjusting hole are also useful identifiers when comparing to the original part.

If the vehicle is one of the listed Mercedes-Benz applications, still verify by part number and mount details before fitting. Fitment can vary between model years and configurations, so the safest approach is to compare the replacement unit with the original alternator and confirm the charge rating, pulley arrangement, and mounting measurements line up.

For workshop planning, the unit weighs 7.56kg and the package dimensions are 23.9 x 20 x 20. The recommended additional repair is a V-Belt or V-Ribbed Belt, which is worth considering if the existing belt shows wear. Replacing a worn belt alongside the alternator can avoid unnecessary labour later, provided the belt specification is checked against the vehicle.

The stated Bosch build features include high quality raw materials, non-recycled copper, application-specific regulators, and long lasting premium quality bearings. Those details describe the construction of the unit, but they do not replace a proper fitment check. The practical buying step is still to confirm the original part number 1986A01059 and the vehicle’s mounting and pulley requirements.

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 1986A01059 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 12 Months, Mount Leg Thickness 80mm, Pivot Hole Diameter 10, Pulley Outside Diameter 58mm, Regulator Type Internal, Suits Unit Make Bosch, Alternator Mount Single Leg, Alternator Charge Current [A] 100.

Additional published details for cross-checking include Alternator Type excl. vacuum pump, Packaging length 23.9, Packaging height 20, Weight 7.56kg, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A01059, Brand BOSCH, Description Bosch Alternator 24V 100A, Adjusting Hole Diameter 12, Pin Code IR130.

Bosch Alternator 24V 100A. Part number 1986A01059 should be checked first. Listed voltage is 24. Listed output rating is 100. 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 8 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

Compatibility note: Please confirm compatibility using part number 1986A01059, the 24V/100A specification, the single leg three-point mounting layout, and the 8 groove pulley details before purchase or installation.

FAQ

What is the part number for this alternator?

The part number listed is 1986A01059.

What voltage and charge output does it have?

It is a 24V alternator with a 100A charge current.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What pulley setup does it use?

It has an 8 groove pulley with a 58mm outside diameter, and the rotation is clockwise.

Which vehicles are listed as suitable applications?

The listed applications include Mercedes-Benz Atego 2, Mercedes-Benz Citaro (O 530), and Mercedes-Benz Tourino (O 510).

What should be checked before ordering?

Confirm the part number 1986A01059, the 24V/100A rating, the single leg three-point mount, and the pulley details, including 8 groove and 58mm outside diameter.