Bosch Alternator 12V 190A Part No. 1986A01057

The Bosch Alternator 12V 190A is a rotating electrical component supplied as a 12 volt unit with a 190 amp charge current and part number 1986A01057. It is listed as an alternator type excl. vacuum pump, so the fit must be checked against the vehicle’s original alternator arrangement before purchase.

This unit uses a double pivot lever fastening type and the recommended related repair is a V-Belt/V-Ribbed Belt. Those details matter because the alternator mounting style and belt setup need to match the vehicle application, especially where the original charging system has been removed or replaced before.

Bosch notes this alternator is manufactured to the same rigorous production standard as OE parts, with high tech regulators and rectifiers to help protect onboard electrical systems. It is manufactured in Spain and carries a 12 month warranty, which gives a useful reference point for buyers comparing replacement options for a 190A charging system.

Key Features

• 12V alternator with 190A charge current
• Bosch part number 1986A01057
• Alternator type: excl. vacuum pump
• Double pivot lever fastening type
• Manufactured in Spain
• 12 month warranty

Specifications

• Brand: Bosch
• Product type: Alternator
• Voltage: 12
• Power rating: 190 amp
• Alternator charge current: 190 A
• Unit of measure: Each
• Manufactured in: Spain
• Packaging dimensions: 23.9 x 20 x 20

Fitment guidance

• Listed fitment groups include Mercedes-Benz C-Class, Mercedes-Benz E-Class and Mercedes-Benz GLC.
• Supported fitment references include Mercedes-Benz C-Class 2013, 2014, 2015, 2016, 2017, 2018 and 2019.
• Supported fitment references include Mercedes-Benz E-Class 2016, 2017 and 2018.
• Fitment is only relevant where the vehicle uses a 12V alternator with the same mounting style and an alternator type excl. vacuum pump.
• The part number 1986A01057 should be checked against the vehicle application before ordering.

Application and Buying Notes

The important checks on this Bosch 12V 190A alternator are the part number 1986A01057, the alternator type excl. vacuum pump, and the double pivot lever fastening type. If any of those details differ from the vehicle’s original unit, the part should not be assumed to fit, even if the vehicle is within a listed Mercedes-Benz model family.

The 190 amp charge current is a significant specification and is suited to applications that were originally built around that output. Do not select an alternator by vehicle badge alone. Match the original charging specification, the mounting style, and the belt arrangement, including the recommended V-Belt/V-Ribbed Belt repair consideration.

When replacing an alternator, it is sensible to inspect the related charging system parts at the same time. Bosch recommends additional repair attention to the belt side of the system, and the unit’s regulators and rectifiers are intended to help protect onboard electrical systems. Care with installation, belt condition and the vehicle’s original electrical setup remains important for a reliable result.

Packaging dimensions are 23.9 x 20 x 20, and the unit is supplied each. That can help when planning freight, storage or workshop handling, but the main buying decision still comes back to vehicle application, mounting design and the exact Bosch part number 1986A01057.

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 1986A01057 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 Spain, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A01057.

Additional published details for cross-checking include Brand BOSCH, Description Bosch Alternator 12V 190A, Power Rating (Amp) 190, Alternator Charge Current [A] 190, Alternator Type excl. vacuum pump, Packaging length 23.9, Packaging height 20, Product Group 2 ALTERNATORS.

Bosch Alternator 12V 190A. Part number 1986A01057 should be checked first. Listed voltage is 12. Listed output rating is 190. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986A01057, 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 190 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2013, MERCEDES-BENZ C-CLASS 2014, MERCEDES-BENZ C-CLASS 2015. 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 by checking the Bosch part number 1986A01057, the vehicle’s original 12V alternator specification, the double pivot lever fastening type, and whether the application is for an alternator excl. vacuum pump.

FAQ

What voltage is this alternator?

This Bosch alternator is a 12V unit.

What is the charge current?

The alternator charge current is 190A, and the power rating is also listed as 190 amp.

Does this alternator include a vacuum pump?

No. It is listed as an alternator type excl. vacuum pump.

What part number should I match?

The Bosch part number is 1986A01057.

What vehicles are listed in the fitment information?

The fitment references include Mercedes-Benz C-Class, Mercedes-Benz E-Class and Mercedes-Benz GLC, with C-Class years 2013 to 2019 and E-Class years 2016 to 2018 shown in the supplied data.

What should I check before ordering?

Check the part number 1986A01057, the 12V specification, the 190A output, the double pivot lever fastening type, and whether the vehicle uses an alternator excl. vacuum pump and the correct belt arrangement.