Bosch Alternator 12V 150A Part No. 1986A00656

This Bosch alternator is a 12V, 150A unit supplied as a new part, with Part No. 1986A00656. It uses an internal regulator, a pad alternator mount, direct fastening, and a 6 groove pulley with a 50mm outside diameter, so the physical layout and drive setup need to match the vehicle application exactly before fitting.

It is manufactured in Spain and carries a 12 month warranty. The unit is listed with clockwise rotation, an inside mounting leg dimension of 56mm, a mount leg thickness of 70mm, and an adjusting hole diameter of 9mm. Those details matter because alternators may look similar but differ in mounting and pulley arrangement.

Bosch identifies this alternator as an OE-standard replacement, with high output at low engine speeds and protection for onboard electrical systems through its regulator and rectifier design. It is listed as alternator type excl. vacuum pump, so the application must be checked against the vehicle’s original charging system specification rather than using appearance alone.

Key Features

• 12V alternator with 150A charge output
• New unit, not remanufactured
• Internal regulator
• 6 groove pulley, 50mm outside diameter
• Clockwise rotation
• Direct fastening with pad mount

Specifications

• Brand: Bosch
• Part No.: 1986A00656
• Type: Alternator
• Voltage: 12V
• Power rating: 150A
• Alternator charge current: 150A
• Regulator type: Internal
• Pulley section: 6 groove

Vehicle fitment details supplied

• MERCEDES-BENZ C-CLASS
• MERCEDES-BENZ E-CLASS
• MERCEDES-BENZ SPRINTER 2-T
• MERCEDES-BENZ SPRINTER 3-T
• MERCEDES-BENZ SPRINTER 4-T
• MERCEDES-BENZ SPRINTER 5-T
• MERCEDES-BENZ VITO
• 5-T

Application and Buying Notes

Before ordering, compare the Bosch Part No. 1986A00656 with the alternator removed from the vehicle, then check the 12V system, 150A output, internal regulator, pad mount, and direct fastening layout. The pulley must also match, as this unit uses a 6 groove pulley with a 50mm outside diameter and clockwise rotation.

Mounting dimensions are critical on this alternator. The listed inside mounting legs are 56mm, the mount leg thickness is 70mm, and the adjusting hole diameter is 9mm. Even small differences in these dimensions can stop the unit from sitting correctly or lining up with the drive belt.

This alternator is listed as excl. vacuum pump, so it should only be considered where the original alternator specification matches that arrangement. If the vehicle uses a different charging system, pulley layout, or mounting style, the correct part needs to be confirmed before purchase.

The 150A charge output is useful on vehicles with higher electrical demand, but output alone does not confirm fitment. The safest match is always the full combination of part number, voltage, mount type, pulley section, rotation, and application details already listed for the vehicle.

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 1986A00656 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, Inside Mounting Legs 56mm, Pin Code IR189, Pulley Outside Diameter 50mm, Regulator Type Internal, Voltage 12, New / Reman. New, Fastening Type Direct fastening.

Additional published details for cross-checking include Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 18.5, Manufactured in Spain, Product Group 2 ALTERNATORS, Part No. 1986A00656, Brand BOSCH, Description Bosch Alternator 12V 150A, Adjusting Hole Diameter 9, Mount Leg Thickness 70mm.

Bosch Alternator 12V 150A. Part number 1986A00656 should be checked first. Listed voltage is 12. Listed output rating is 150. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. Regulator type is Internal. Pulley configuration is 6 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 1986A00656, 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 150 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment using Bosch Part No. 1986A00656, the 12V/150A specification, pad mount, direct fastening, 6 groove pulley, clockwise rotation, and the listed vehicle application details before ordering.

FAQ

Is this alternator new or remanufactured?

It is listed as new, not remanufactured. For this listing, part number 1986A00656 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include 5-T 2006, 5-T 2007, 5-T 2008. These details should still be checked against the original unit before ordering.

What is the voltage and output?

The alternator is 12V with a 150A power rating and 150A charge current. For this listing, part number 1986A00656 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include 5-T 2006, 5-T 2007, 5-T 2008. These details should still be checked against the original unit before ordering.

Does it use an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number 1986A00656 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include 5-T 2006, 5-T 2007, 5-T 2008. These details should still be checked against the original unit before ordering.

What pulley type does it use?

It has a 6 groove pulley with a 50mm outside diameter and clockwise rotation. For this listing, part number 1986A00656 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include 5-T 2006, 5-T 2007, 5-T 2008. These details should still be checked against the original unit before ordering.

What part number should I check against my old unit?

The Bosch part number is 1986A00656. For this listing, part number 1986A00656 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include 5-T 2006, 5-T 2007, 5-T 2008. These details should still be checked against the original unit before ordering.

What vehicles are listed in the fitment data?

The supplied fitment data includes Mercedes-Benz C-Class, E-Class, Sprinter 2-T, Sprinter 3-T, Sprinter 4-T, Sprinter 5-T, Vito, and 5-T, with example year entries shown for C-Class 1997 to 2007 and 5-T 2006 to 2009. For this listing, part number 1986A00656 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include 5-T 2006, 5-T 2007, 5-T 2008. These details should still be checked against the original unit before ordering.