Bosch Alternator 24V 100A 1986A00986

The Bosch Alternator 24V 100A, part number 1986A00986, is a new alternator designed for 24-volt charging systems with a 100 amp output. It uses an internal regulator and is listed as an alternator type excl. vacuum pump, so it is important to compare the replacement unit against the vehicle’s original charging arrangement before ordering.

This unit is noted as suitable for Mercedes-Benz 2635 with OM447 engine, and the fitment information also points to Mercedes-Benz Axor 2 applications. The alternator uses a single leg mount with double pivot lever fastening, a 17mm shaft diameter, an 11mm pivot hole diameter, and a 12mm adjusting hole diameter, so physical mounting checks should be made carefully against the existing unit.

Bosch lists this alternator as manufactured in Spain and supplied with a 12 month warranty. It weighs 7.4kg, has a mount leg thickness of 80mm, and a centre-to-centre mounting measurement of 158mm, which are useful reference points when confirming that the replacement matches the vehicle already in service.

Key Features

• 24V alternator with 100A output
• Bosch part number 1986A00986
• New unit, not remanufactured
• Internal regulator
• Single leg mount with double pivot lever fastening
• Listed for Mercedes-Benz 2635 with OM447 engine

Specifications

• Voltage: 24V
• Power rating / charge current: 100A
• Part No.: 1986A00986
• Brand: Bosch
• Type: Alternator
• New / Reman.: New
• Regulator type: Internal
• Rotation: CW

Fitment guidance

• Mercedes-Benz 2635 with OM447 engine
• Mercedes-Benz Axor 2
• Mercedes-Benz Axor 2 2004

Application and Buying Notes

When replacing an alternator, the safest approach is to match the part number 1986A00986, the 24V system voltage, and the 100A charge current before anything else. This unit also has an internal regulator, so it should be compared with the original alternator’s regulator arrangement rather than assuming a swap based on appearance alone.

The mounting details matter on this Bosch unit: single leg mount, double pivot lever fastening, 158mm mount centre to centre, 80mm mount leg thickness, 11mm pivot hole diameter, 12mm adjusting hole diameter, and 17mm shaft diameter. If any of these measurements differ from the existing alternator, the part may not install correctly even if the vehicle family appears similar.

Because the alternator is listed as excl. vacuum pump, it is worth checking whether the original unit uses a vacuum pump drive or a different accessory setup. That single detail can be the difference between a straightforward replacement and a mismatch, particularly on commercial vehicle applications where several alternator variants may exist.

Bosch notes V-Belt / V-Ribbed Belt as a recommended additional repair. If the belt is worn, glazed, cracked, or noisy, replacing it at the same time is a practical way to reduce the chance of repeat charging complaints after the alternator is fitted. The unit is new, weighs 7.4kg, and is supplied with a 12 month warranty, which gives a clear reference for inspection and parts planning.

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 1986A00986 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 11, Regulator Type Internal, Shaft Diameter 17mm, Alternator Mount Single Leg, New / Reman. New, Fastening Type Double Pivot Lever.

Additional published details for cross-checking include Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 20, Manufactured in Spain, Product Group 2 ALTERNATORS, Part No. 1986A00986, Brand BOSCH, Description Bosch Alternator 24V 100A, Adjusting Hole Diameter 12, Pin Code IR98.

Bosch Alternator 24V 100A. Part number 1986A00986 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. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 1986A00986, 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 MERCEDES-BENZ AXOR 2, MERCEDES-BENZ AXOR 2 2004. 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.

The listed warranty is 12 Months. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm fitment by matching part number 1986A00986, the 24V 100A specification, the internal regulator setup, and the mounting measurements against the original alternator and vehicle application details before purchase.

FAQ

Is this a new alternator or a remanufactured unit?

This Bosch alternator is listed as new, not remanufactured.

What is the voltage and amperage rating?

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

What is the part number?

The part number is 1986A00986.

Does this alternator have an internal regulator?

Yes. The regulator type is listed as internal.

What vehicle application is specifically noted?

It is listed to suit Mercedes-Benz 2635 with OM447 engine, and the fitment data also references Mercedes-Benz Axor 2 applications.

What should I check before ordering?

Check the part number 1986A00986, 24V system voltage, 100A output, internal regulator type, and the mounting measurements: single leg mount, 158mm centre to centre, 80mm mount leg thickness, 11mm pivot hole diameter, 12mm adjusting hole diameter, and 17mm shaft diameter.