Bosch Alternator 12V 90A 1986A00646

The Bosch Alternator 12V 90A, part number 1986A00646, is a rotating electrical component for 12-volt applications with a 90 amp power rating. It uses a pad mount, a 6 groove pulley, and clockwise rotation, so those details should be checked carefully against the vehicle before purchase.

This alternator is listed with an internal regulator and a pulley outside diameter of 50mm. It is supplied as each unit and carries a 12 month warranty. The unit weight is 5.945kg, which can be useful when comparing against an existing alternator during replacement work.

Fitment information supplied with this part includes MERCEDES-BENZ SPRINTER 3-T applications. That makes the part number 1986A00646 and the stated alternator details important checkpoints when verifying suitability, especially if you are replacing an existing Bosch unit or matching by the original configuration.

Key Features

• Bosch alternator for 12V systems
• 90A output
• Pad mount design
• 6 groove pulley
• Clockwise rotation
• Internal regulator

Specifications

• Brand: Bosch
• Product type: Alternator
• Part number: 1986A00646
• Voltage: 12V
• Power rating: 90A
• Rotation: CW
• Alternator mount: Pad
• Pulley section: 6 groove

Fitment guidance

• MERCEDES-BENZ SPRINTER 3-T
• MERCEDES-BENZ SPRINTER 3-T 2000
• MERCEDES-BENZ SPRINTER 3-T 2001
• MERCEDES-BENZ SPRINTER 3-T 2002
• MERCEDES-BENZ SPRINTER 3-T 2003
• MERCEDES-BENZ SPRINTER 3-T 2004
• MERCEDES-BENZ SPRINTER 3-T 2005
• MERCEDES-BENZ SPRINTER 3-T 2006

Application and Buying Notes

Before ordering, compare the part number 1986A00646 with the alternator already fitted to the vehicle and confirm the mounting style is pad mount. The pulley arrangement also needs to match, as this unit is specified with a 6 groove pulley, 50mm outside diameter, and clockwise rotation.

Electrical output matters when replacing an alternator, so the 12V and 90A rating should be checked against the vehicle’s charging system requirements. The internal regulator specification is another important point, as regulator type needs to align with the application and wiring setup.

The supplied fitment references point to MERCEDES-BENZ SPRINTER 3-T applications, including model years 2000 through 2006 in the fitment preview. Even with that guidance, it is still best to compare the existing unit’s mounting, pulley, rotation, and part number before fitting.

If you are matching a removed alternator, the weight of 5.945kg can help as a rough comparison, but it should not be used on its own to confirm fitment. The safest approach is to rely on the vehicle application, part number, and the listed alternator specifications together.

This alternator is sold as a single unit and is covered by a 12 month warranty. As with any charging system component, check the condition of related parts such as belt, tensioner, and wiring before installation so the replacement can be assessed properly once fitted.

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 1986A00646 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, Power Rating (Amp) 90, Pulley Section 6 Groove, Rotation CW, Alternator Mount Pad, Product Group 2 ALTERNATORS, Part No. 1986A00646.

Additional published details for cross-checking include Brand BOSCH, Description Bosch Alternator 12V 90A, Pin Code IR189, Pulley Outside Diameter 50mm, Regulator Type Internal, Voltage 12, Weight 5.945kg, Product Group 1 ROTATING ELECTRICAL.

Bosch Alternator 12V 90A. Part number 1986A00646 should be checked first. Listed voltage is 12. Listed output rating is 90. 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 1986A00646, 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.

Compatibility note: Confirm compatibility by checking the part number 1986A00646, the 12V 90A specification, the pad mount, 6 groove pulley, 50mm pulley outside diameter, and clockwise rotation against the vehicle application before purchase.

FAQ

What is the part number for this Bosch alternator?

The part number listed is 1986A00646. For this listing, part number 1986A00646 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MERCEDES-BENZ SPRINTER 3-T, MERCEDES-BENZ SPRINTER 3-T 2000, MERCEDES-BENZ SPRINTER 3-T 2001. These details should still be checked against the original unit before ordering.

What voltage and output does this alternator have?

It is a 12V alternator with a 90A power rating. For this listing, part number 1986A00646 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MERCEDES-BENZ SPRINTER 3-T, MERCEDES-BENZ SPRINTER 3-T 2000, MERCEDES-BENZ SPRINTER 3-T 2001. These details should still be checked against the original unit before ordering.

What type of pulley does it use?

It has a 6 groove pulley with a 50mm outside diameter. For this listing, part number 1986A00646 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MERCEDES-BENZ SPRINTER 3-T, MERCEDES-BENZ SPRINTER 3-T 2000, MERCEDES-BENZ SPRINTER 3-T 2001. These details should still be checked against the original unit before ordering.

Does it have an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number 1986A00646 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MERCEDES-BENZ SPRINTER 3-T, MERCEDES-BENZ SPRINTER 3-T 2000, MERCEDES-BENZ SPRINTER 3-T 2001. These details should still be checked against the original unit before ordering.

Which vehicle applications are referenced?

The supplied fitment references include MERCEDES-BENZ SPRINTER 3-T applications, with model years shown in the preview from 2000 through 2006. For this listing, part number 1986A00646 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MERCEDES-BENZ SPRINTER 3-T, MERCEDES-BENZ SPRINTER 3-T 2000, MERCEDES-BENZ SPRINTER 3-T 2001. These details should still be checked against the original unit before ordering.

What warranty is listed?

The warranty listed is 12 months. For this listing, part number 1986A00646 is the main reference point. Listed voltage is 12. Listed output rating is 90. Published fitment references include MERCEDES-BENZ SPRINTER 3-T, MERCEDES-BENZ SPRINTER 3-T 2000, MERCEDES-BENZ SPRINTER 3-T 2001. These details should still be checked against the original unit before ordering.