Bosch Alternator 12V 120A Part No. 1986A00847

This Bosch alternator is a 12V, 120A rotating electrical component identified by part number 1986A00847. It is listed as an alternator type excl. vacuum pump, with a double pivot lever fastening type and a 12-month warranty.

The unit is supplied as each, with packaging dimensions of 23.9 x 20 x 20. It is manufactured in China and carries a power rating of 120 amps, which aligns with the listed alternator charge current of 120A.

Bosch describes this alternator as being made from high-quality raw materials for long life and optimal performance, with corrosion resistance for harsh conditions and a reduction drive designed to maintain continual speeds for easier starting. Those are practical points to check when comparing against the original unit on the vehicle.

Key Features

• 12V alternator with 120A output
• Part No. 1986A00847
• Alternator type: excl. vacuum pump
• Double pivot lever fastening type
• Corrosion resistant construction
• Reduction drive design

Specifications

• Brand: Bosch
• Product type: Alternator
• Voltage: 12V
• Power rating / charge current: 120A
• Unit of measure: Each
• Manufactured in China
• Packaging dimensions: 23.9 x 20 x 20
• Recommended additional repair: V-Belt / V-Ribbed Belt

Known fitment references

• Porsche 911
• Porsche 911 1997 to 2005
• Porsche Boxster
• Porsche Boxster 1999

Application and Buying Notes

Before ordering, confirm the original alternator matches the key identifiers here: Bosch, part number 1986A00847, 12V, and 120A. The mounting style is listed as double pivot lever, and the alternator type is excl. vacuum pump, so those details matter just as much as voltage and output when checking against the existing unit.

If you are comparing against a removed part, inspect the pulley and mounting arrangement carefully, then compare the physical dimensions and fastening type. The listed packaging size is 23.9 x 20 x 20, which gives a useful reference for handling and storage, but the most important check is whether the vehicle’s original alternator matches the part number and application details.

The listed recommended additional repair is a V-Belt / V-Ribbed Belt. That is worth considering if the belt condition is unknown, worn, or being serviced at the same time. An alternator replacement is often simplest when related drive components are checked at the same time, especially where access is tight or the existing belt shows age.

The product is described as corrosion resistant and built for long life, but final suitability still depends on the exact application. For Porsche references, confirm the model, year, and any alternator-specific details against the current vehicle before purchase. If the original unit differs in fastening, output, or vacuum pump arrangement, this part may not be the correct replacement.

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 1986A00847 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, Packaging width 20, Manufactured in China, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A00847.

Additional published details for cross-checking include Brand BOSCH, Description Bosch Alternator 12V 120A, Power Rating (Amp) 120, Alternator Charge Current [A] 120, Alternator Type excl. vacuum pump, Packaging length 23.9, Packaging height 20, Product Group 2 ALTERNATORS.

Bosch Alternator 12V 120A. Part number 1986A00847 should be checked first. Listed voltage is 12. Listed output rating is 120. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986A00847, 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 120 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include PORSCHE 911, PORSCHE 911 1997, PORSCHE 911 1998, PORSCHE 911 1999. 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: Confirm fitment by checking Bosch part number 1986A00847, 12V voltage, 120A output, double pivot lever mounting, and the alternator type excl. vacuum pump against the vehicle’s original unit and application details before ordering.

FAQ

What is the part number for this alternator?

The listed part number is 1986A00847. For this listing, part number 1986A00847 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include PORSCHE 911, PORSCHE 911 1997, PORSCHE 911 1998. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 120A output and a listed alternator charge current of 120A. For this listing, part number 1986A00847 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include PORSCHE 911, PORSCHE 911 1997, PORSCHE 911 1998. These details should still be checked against the original unit before ordering.

Does this alternator include a vacuum pump?

No. The alternator type is listed as excl. vacuum pump. For this listing, part number 1986A00847 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include PORSCHE 911, PORSCHE 911 1997, PORSCHE 911 1998. These details should still be checked against the original unit before ordering.

What mounting type is listed?

The fastening type is listed as double pivot lever. For this listing, part number 1986A00847 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include PORSCHE 911, PORSCHE 911 1997, PORSCHE 911 1998. These details should still be checked against the original unit before ordering.

Is there a warranty?

Yes. The listed warranty is 12 months. For this listing, part number 1986A00847 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include PORSCHE 911, PORSCHE 911 1997, PORSCHE 911 1998. These details should still be checked against the original unit before ordering.

What vehicles are referenced in the fitment data?

The fitment references include Porsche 911, Porsche 911 from 1997 to 2005, Porsche Boxster, and Porsche Boxster 1999. Fitment should still be confirmed against the original part number and vehicle details before purchase. For this listing, part number 1986A00847 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include PORSCHE 911, PORSCHE 911 1997, PORSCHE 911 1998. These details should still be checked against the original unit before ordering.