Bosch Alternator 24V 100A 1986A00977

The Bosch alternator listed here is a 24V, 100A unit, identified by part number 1986A00977. It is a new alternator, supplied each, and is described as an alternator type excl. vacuum pump, so matching the application to the correct charging system layout is important before purchase.

Mounting details matter with this unit: it uses a single leg alternator mount, three-point mounting, a mount leg thickness of 80mm, a pivot hole diameter of 10.5mm, an adjusting hole diameter of 12.5mm, and a mount centre-to-centre measurement of 157mm. Those dimensions are the key checks when comparing against the removed part.

This Bosch alternator is rated at 100A charge current and is manufactured in Spain. The listed features state it is made from high quality raw materials for increased endurance and reliability, and it carries a 12 month warranty.

Recommended additional repairs include the V-belt or V-ribbed belt when fitting an alternator of this type. If the charging fault has also affected belt condition or belt tracking, it is sensible to inspect the full drive setup at the same time.

Key Features

• 24V alternator with 100A output
• Bosch brand, part number 1986A00977
• New unit, sold each
• Single leg mount with three-point mounting
• Alternator type excl. vacuum pump
• Made from high quality raw materials for increased endurance and reliability

Specifications

• Type: Alternator
• Voltage: 24V
• Power rating: 100A
• Alternator charge current: 100A
• Part No.: 1986A00977
• Brand: Bosch
• New / Reman.: New
• Suits unit make: Bosch

Fitment guidance

• Fitment data supplied for DAF XF 105.
• Fitment data supplied for Mercedes-Benz Actros.
• Fitment data supplied for Mercedes-Benz Actros MP2 / MP3.
• Fitment data supplied for Volkswagen Volkbus.
• Fitment data supplied for Volkswagen Worker.

Application and Buying Notes

Before ordering, compare the part number 1986A00977 and the mounting measurements against the alternator already fitted to the vehicle. The critical points here are the single leg mount, three-point mounting pattern, 80mm mount leg thickness, 10.5mm pivot hole, 12.5mm adjusting hole, and 157mm centre-to-centre measurement.

This alternator is rated at 24V and 100A, so it is intended for a 24-volt charging system. A 24V alternator should not be selected on voltage alone; the physical mounting arrangement and the note excluding vacuum pump are just as important for a correct match.

The listed fitment information includes DAF XF 105, Mercedes-Benz Actros, Mercedes-Benz Actros MP2 / MP3, Volkswagen Volkbus, and Volkswagen Worker, but those model references should still be checked against the exact application details on the vehicle. Variations can exist within the same model range, especially where mount style or accessory layout differs.

If the existing alternator has caused belt wear, the recommended additional repair is the V-belt or V-ribbed belt. It is sensible to inspect belt condition, alignment, and associated pulleys before installation so the replacement alternator is not fitted into a worn drive system.

This is a new Bosch unit with a 12 month warranty and manufacturing origin listed as Spain. Those details are useful when comparing replacement options, but the final buying decision should still be based on the vehicle application, the mounting dimensions, and the part number printed on the original unit where available.

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 1986A00977 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 10.5, Suits Unit Make Bosch, Alternator Mount Single Leg, New / Reman. New, Fastening Type Three-point mounting, Recommended additional repairs V-Belt/V-Ribbed Belt.

Additional published details for cross-checking include Packaging width 18.5, Manufactured in Spain, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A00977, Brand BOSCH, Description Bosch Alternator 24V 100A, Adjusting Hole Diameter 12.5, Pin Code IR98, Power Rating (Amp) 100, Voltage 24.

Bosch Alternator 24V 100A. Part number 1986A00977 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. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 1986A00977, 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 24 and output 100 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include DAF XF 105, DAF XF 105 2005, MERCEDES-BENZ ACTROS, MERCEDES-BENZ ACTROS 1996, MERCEDES-BENZ ACTROS 1997, MERCEDES-BENZ ACTROS 1998. 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: Please confirm compatibility by matching part number 1986A00977, the 24V 100A specification, the single leg three-point mounting, and the vehicle application details before ordering.

FAQ

What is the part number for this Bosch alternator?

The listed part number is 1986A00977.

What voltage and output does this alternator have?

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

Is this a new or remanufactured alternator?

It is listed as new.

Does this alternator use vacuum pump mounting?

No. The alternator type is listed as excl. vacuum pump.

What mounting details should be checked before buying?

Check the single leg mount, three-point mounting, 80mm mount leg thickness, 10.5mm pivot hole diameter, 12.5mm adjusting hole diameter, and 157mm mount centre-to-centre measurement.

What warranty is listed with this alternator?

The listed warranty is 12 months.