Bosch Alternator 12V 90A Part No. 1986A00813

This Bosch alternator is a 12V, 90A unit identified by part number 1986A00813. It is listed as an alternator type excl. vacuum pump, so it is important to compare the application and mounting details carefully before purchase, especially if you are replacing an existing Bosch charging unit on a Mercedes-Benz application.

The unit uses a single pivoted lever fastening type and is supplied as one each. A V-belt or V-ribbed belt is recommended as an additional repair item, which is worth checking while the charging system is apart. The alternator charge current is 90A, so it suits buyers looking to replace a 12V charging component with the same current rating and part identification.

Bosch lists this alternator under rotating electrical and alternators product groups, with a 12 month warranty. It is manufactured in China (Taiwan) and described as corrosion resistant, with a reduction drive designed to maintain continual speeds for easier starting. Those details can matter when matching the replacement to the vehicle’s original setup and the conditions the vehicle operates in.

Key Features

• Bosch alternator, 12V 90A
• Part No. 1986A00813
• Alternator type: excl. vacuum pump
• Single pivoted lever fastening type
• Corrosion resistant construction
• Reduction drive design

Specifications

• Alternator charge current: 90A
• Voltage: 12V
• Unit of measure: each
• Recommended additional repair: V-Belt/V-Ribbed Belt
• Packaging dimensions: 23.9 x 20 x 20
• Manufactured in China (Taiwan)
• Product group: Rotating Electrical / Alternators

Confirmed fitment information

• Mercedes-Benz 124 series applications
• Mercedes-Benz C-Class applications
• Mercedes-Benz CLK applications
• Mercedes-Benz E-Class applications
• Mercedes-Benz SLK applications

Application and Buying Notes

When replacing an alternator, the most reliable match is the part number first, followed by the application details. This unit is Bosch part number 1986A00813 and is rated at 12V 90A, so the existing alternator should be checked for the same electrical rating and the same basic type before ordering. The listing also specifies alternator type excl. vacuum pump, which is a key checkpoint because alternator layouts can differ even when the vehicle family is similar.

The fastening type is listed as single pivoted lever. That means the physical mounting arrangement should be checked against the old unit and the vehicle’s engine bay setup. If the mounting style, pulley arrangement, or belt path differs, the alternator may not be the correct replacement even if the electrical rating appears close. For this reason, matching the part number and mounting style is the safest way to avoid unnecessary returns.

Bosch recommends a V-Belt or V-Ribbed Belt as an additional repair item. If the belt shows cracking, glazing, or stretch, it is sensible to replace it during the alternator job rather than reusing an old belt. That helps reduce the chance of belt-related charging complaints after installation, particularly where the original belt has already covered a long service life.

The product is described as corrosion resistant and built from high quality raw materials for long life and performance, but the condition of the vehicle’s wiring, terminals, and belt drive still matters. A new alternator cannot compensate for poor connections, worn belt tension, or charging circuit faults. Before fitting, it is worth checking the battery condition, cable integrity, and any signs of heat damage or corrosion at the charging connections.

The packaging dimensions are 23.9 x 20 x 20, which may be useful if you are arranging freight or checking storage space. If the vehicle is one of the Mercedes-Benz applications listed, confirm the exact engine and charging system details before buying. Even within the same model range, alternator fitment can vary with engine type, vacuum pump arrangement, and accessory drive configuration.

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 1986A00813 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, Fastening Type Single pivoted lever, Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 20, Manufactured in China (Taiwan), Product Group 1 ROTATING ELECTRICAL, Part No. 1986A00813, 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 23.9, Packaging height 20, Product Group 2 ALTERNATORS.

Bosch Alternator 12V 90A. Part number 1986A00813 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 1986A00813, 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 output 90 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include MERCEDES-BENZ 124, MERCEDES-BENZ 124 1986, MERCEDES-BENZ 124 1987, MERCEDES-BENZ 124 1988. 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 fitment using Bosch part number 1986A00813, the 12V 90A rating, the single pivoted lever mounting type, and the listed Mercedes-Benz application details before ordering.

FAQ

What is the part number for this Bosch alternator?

The Bosch part number listed is 1986A00813.

What are the electrical specifications?

It is a 12V alternator with a 90A charge current.

Does this alternator include a vacuum pump?

No. The listing states alternator type excl. vacuum pump.

What vehicle applications are listed?

Mercedes-Benz 124 series, C-Class, CLK, E-Class and SLK applications are listed.

What mounting type is specified?

The fastening type is listed as single pivoted lever.

Is any related repair item recommended?

Yes. A V-Belt or V-Ribbed Belt is listed as a recommended additional repair item.