Bosch Alternator 12V 90A Part No. 1986A00814

The Bosch Alternator 12V 90A, part number 1986A00814, is a light commercial alternator supplied as a single unit and rated at 90 amps. It is listed as an alternator type excl. vacuum pump, so it suits applications that specifically call for that configuration.

This unit uses a single pivoted lever fastening type and is grouped under rotating electrical components. Bosch identifies it as a 12V alternator, with a 90A charge current, which makes the part number and electrical rating the key checks before ordering.

The alternator is covered by a 12 months warranty and is manufactured in China. It is packaged individually, with packaging dimensions of 24 cm long, 18.5 cm wide and 20 cm high, which can be useful when checking freight handling or workshop storage requirements.

Key Features

• Bosch 12V alternator rated at 90A
• Part number 1986A00814
• Alternator type: excl. vacuum pump
• Single pivoted lever fastening type
• Supplied each
• 12 months warranty

Specifications

• Brand: Bosch
• Product type: Alternator light comm
• Charge current: 90 A
• Voltage: 12 V
• Part No.: 1986A00814
• Alternator type: excl. vacuum pump
• Fastening type: Single pivoted lever
• Recommended additional repairs: V-Belt / V-Ribbed Belt

Fitment guidance

• Listed fitment information includes Mercedes-Benz and Mercedes-Benz S-Class applications.
• The grouped preview shows Mercedes-Benz S-Class applications across 1991 to 1999.
• Fitment is only a guide and should be checked against the vehicle’s alternator part number, mounting arrangement and electrical rating before purchase.
• Because the alternator is specified as excl. vacuum pump, confirm the existing unit matches that configuration.

Application and Buying Notes

When replacing an alternator, the safest match is the part number and specification set. This Bosch unit is identified as 1986A00814, 12V and 90A, so the first step is to confirm your existing alternator matches those details before relying on vehicle description alone.

For workshop planning, this item is supplied each and carries a 12 months warranty. The packaging size is 24 x 18.5 x 20 cm, which is straightforward to handle, but the important point for the vehicle is still correct matching by part number, charging output and mounting setup.

If you are comparing this against a removed unit, check the label, plug arrangement, pulley and mounting points on the vehicle before ordering. Alternators with the same Bosch name can still differ by output, fastening style or whether they are built with or without a vacuum pump.

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 1986A00814 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 LIGHT COMM, Unit of Measure EACH, Warranty 12 Months, Fastening Type Single pivoted lever, Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 18.5, Manufactured in China, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A00814, Brand BOSCH.

Additional published details for cross-checking include Description Bosch Alternator 12V 90A, Alternator Charge Current [A] 90, Alternator Type excl. vacuum pump, Packaging length 24, Packaging height 20, Product Group 2 ALTERNATORS.

Bosch Alternator 12V 90A. Part number 1986A00814 should be checked first. Listed output rating is 90. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986A00814, 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 light comm in workshop, fleet, trade, agricultural, or construction service, the listed output 90 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include MERCEDES-BENZ S-CLASS, MERCEDES-BENZ S-CLASS 1991, MERCEDES-BENZ S-CLASS 1992, MERCEDES-BENZ S-CLASS 1993. 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: Please confirm fitment by matching part number 1986A00814, 12V 90A output, mounting style and alternator type excl. vacuum pump against the vehicle application before buying. Vehicle listings are a guide only and should be verified against the existing unit.

FAQ

What is the part number for this Bosch alternator?

The part number is 1986A00814. For this listing, part number 1986A00814 is the main reference point. Listed output rating is 90. Published fitment references include MERCEDES-BENZ S-CLASS, MERCEDES-BENZ S-CLASS 1991, MERCEDES-BENZ S-CLASS 1992. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator rated at 90A charge current. For this listing, part number 1986A00814 is the main reference point. Listed output rating is 90. Published fitment references include MERCEDES-BENZ S-CLASS, MERCEDES-BENZ S-CLASS 1991, MERCEDES-BENZ S-CLASS 1992. 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 1986A00814 is the main reference point. Listed output rating is 90. Published fitment references include MERCEDES-BENZ S-CLASS, MERCEDES-BENZ S-CLASS 1991, MERCEDES-BENZ S-CLASS 1992. These details should still be checked against the original unit before ordering.

What mounting style does it use?

It uses a single pivoted lever fastening type. For this listing, part number 1986A00814 is the main reference point. Listed output rating is 90. Published fitment references include MERCEDES-BENZ S-CLASS, MERCEDES-BENZ S-CLASS 1991, MERCEDES-BENZ S-CLASS 1992. These details should still be checked against the original unit before ordering.

What vehicles are listed in the fitment guidance?

The fitment guidance includes Mercedes-Benz and Mercedes-Benz S-Class applications, with the preview showing S-Class applications across 1991 to 1999. For this listing, part number 1986A00814 is the main reference point. Listed output rating is 90. Published fitment references include MERCEDES-BENZ S-CLASS, MERCEDES-BENZ S-CLASS 1991, MERCEDES-BENZ S-CLASS 1992. These details should still be checked against the original unit before ordering.

Is any extra maintenance item recommended with this alternator?

Yes. The listing recommends checking a V-Belt or V-Ribbed Belt as an additional repair item. For this listing, part number 1986A00814 is the main reference point. Listed output rating is 90. Published fitment references include MERCEDES-BENZ S-CLASS, MERCEDES-BENZ S-CLASS 1991, MERCEDES-BENZ S-CLASS 1992. These details should still be checked against the original unit before ordering.