Bosch Alternator 12V 155A Part No. 1986A00891

The Bosch Alternator 12V 155A is a rotating electrical component supplied as each unit and identified by Part No. 1986A00891. It is a 12 volt alternator with a 155 amp charge current, and it is listed as an alternator type excluding vacuum pump.

This unit uses a double pivot lever fastening type and is noted for use with a V-Belt or V-Ribbed Belt as a recommended additional repair. Those details matter when matching the alternator to the vehicle mounting arrangement and checking the belt condition at the same time.

Bosch lists this alternator with a 12 month warranty and manufacturing origin in China. The stated features focus on durable raw materials, corrosion resistance, and a reduction drive that maintains continual speeds for easier starting.

As with any alternator purchase, the part number and the charge output are the most important checks. If you are replacing an existing Bosch unit, 1986A00891 and the 12V 155A rating are the key identifiers to compare before ordering.

Key Features

• 12V alternator with 155A charge current
• Bosch Part No. 1986A00891
• Alternator type: excl. vacuum pump
• Double pivot lever fastening type
• Corrosion resistant construction
• Reduction drive for continual speeds

Specifications

• Brand: Bosch
• Product type: Alternator
• Voltage: 12V
• Power rating: 155A
• Alternator charge current: 155A
• Part No.: 1986A00891
• Warranty: 12 months
• Manufactured in China

Application and Buying Notes

Before ordering, confirm the replacement alternator matches Part No. 1986A00891, the 12V system requirement, and the 155A charge rating. Those are the most reliable identifiers available here, especially where the vehicle has previously been fitted with a Bosch alternator of the same specification.

The alternator is listed with a double pivot lever fastening type, so the physical mounting arrangement needs to line up with the existing setup. If the original unit uses a different bracket style or the belt drive layout differs, the alternator may not be a direct match even if the electrical rating looks similar.

Bosch notes this alternator as excl. vacuum pump, which is an important distinction when comparing against removed parts. A vacuum pump-equipped alternator is a different application, so that detail should be checked carefully against the old unit and the vehicle configuration.

The recommended additional repair is a V-Belt or V-Ribbed Belt. When an alternator is being replaced, it is sensible to inspect the belt condition, tension, and pulley wear at the same time, because belt issues can affect charging performance and starting behaviour.

The listed features point to durable materials, corrosion resistance, and a reduction drive designed to maintain continual speeds for easier starting. Those are useful service characteristics, but they do not replace the need to verify the mounting, drive arrangement, and part number before purchase.

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 1986A00891 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, Voltage 12, Fastening Type Double Pivot Lever, Recommended additional repairs V-Belt/V-Ribbed Belt, Product Group 2 ALTERNATORS, Part No. 1986A00891, Brand BOSCH.

Additional published details for cross-checking include Description Bosch Alternator 12V 155A, Power Rating (Amp) 155, Alternator Charge Current [A] 155, Alternator Type excl. vacuum pump, Manufactured in China, Product Group 1 ROTATING ELECTRICAL.

Bosch Alternator 12V 155A. Part number 1986A00891 should be checked first. Listed voltage is 12. Listed output rating is 155. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986A00891, 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 155 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching Bosch Part No. 1986A00891, 12V system voltage, 155A charge current, fastening type, and whether your application requires an alternator excl. vacuum pump. Where in doubt, compare the removed unit directly before ordering.

FAQ

What is the part number for this Bosch alternator?

The part number listed is 1986A00891. For this listing, part number 1986A00891 is the main reference point. Listed voltage is 12. Listed output rating is 155. 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 with a 155A charge current and 155A power rating. For this listing, part number 1986A00891 is the main reference point. Listed voltage is 12. Listed output rating is 155. These details should still be checked against the original unit before ordering.

Does this alternator include a vacuum pump?

No. It is listed as alternator type excl. vacuum pump. For this listing, part number 1986A00891 is the main reference point. Listed voltage is 12. Listed output rating is 155. These details should still be checked against the original unit before ordering.

What mounting type is listed for this unit?

The fastening type is listed as double pivot lever. For this listing, part number 1986A00891 is the main reference point. Listed voltage is 12. Listed output rating is 155. These details should still be checked against the original unit before ordering.

What belt type should be checked with this alternator?

The recommended additional repairs are V-Belt or V-Ribbed Belt, so those should be checked during replacement. For this listing, part number 1986A00891 is the main reference point. Listed voltage is 12. Listed output rating is 155. These details should still be checked against the original unit before ordering.

What warranty is listed?

The listed warranty is 12 months. For this listing, part number 1986A00891 is the main reference point. Listed voltage is 12. Listed output rating is 155. These details should still be checked against the original unit before ordering.