Bosch Alternator 12V 200A Part No. 1986A00955

Bosch alternator rated at 12V and 200A, part no. 1986A00955, supplied as a single unit for vehicle charging system replacement work. It uses an internal regulator and is listed as an alternator type excl. vacuum pump, which is an important check when matching the unit to the vehicle application.

The pulley is 8 groove with a 62mm outside diameter, and the unit is specified as clockwise rotation. Mounting details recorded for this alternator include a single leg alternator mount, 56mm mount leg thickness, 156mm mount centre-to-centre, and 11mm pivot and adjusting hole diameters. Those dimensions matter when comparing against the removed unit.

Bosch lists this alternator with a 200A charge current, 12 month warranty, and a weight of 7.72kg. It is manufactured in China and described as using premium quality bearings, non-recycled copper, and regulators designed for the vehicle application.

Because alternator fitment depends on the exact charging system layout, pulley alignment, and mount style, the part number 1986A00955 and the listed mounting measurements should be checked carefully before purchase. The correct belt type and pulley arrangement also need to match the vehicle setup.

Key Features

• Bosch alternator, 12V 200A
• Part No. 1986A00955
• Internal regulator
• 8 groove pulley, 62mm outside diameter
• Clockwise rotation
• Single leg alternator mount

Specifications

• Power rating: 200A
• Voltage: 12V
• Alternator type: excl. vacuum pump
• Mount leg thickness: 56mm
• Mount centre-to-centre: 156mm
• Pivot hole diameter: 11mm
• Adjusting hole diameter: 11mm
• Pulley section: 8 groove

Fitment guidance

• Fitment data provided: JOHN DEERE SERIES 8
• Fitment data provided: JOHN DEERE SERIES 8 2011
• Confirm the alternator type is excl. vacuum pump before ordering
• Check the 8 groove pulley, 62mm pulley outside diameter, and clockwise rotation against the removed unit
• Verify the single leg mount, 156mm mount centre-to-centre, and 11mm pivot and adjusting holes

Application and Buying Notes

When replacing a 12V 200A alternator, the safest comparison points are the part number 1986A00955, the mount style, and the pulley details. This unit is listed with a single leg alternator mount, single pivoted lever fastening type, and a 56mm mount leg thickness, so it should only be considered where those details line up with the original alternator.

The pulley setup is just as important as the electrical rating. This Bosch unit uses an 8 groove pulley with a 62mm outside diameter and clockwise rotation. If the belt type, groove count, or rotation does not match, the alternator may not install or operate correctly in the vehicle.

The listed 200A charge current is a key specification, but it should be matched to the vehicle’s original charging system requirements rather than used as the only selection guide. The note to consider V-Belt/V-Ribbed Belt related repairs is also worth taking seriously, because worn belt components can affect charging system performance and belt life.

As with any replacement alternator, inspect the removed unit and compare the mounting holes, pulley alignment, and regulator type before fitting. The internal regulator and excl. vacuum pump design are important details that can rule a part in or out quickly, especially when working from a vehicle application that has more than one charging system variant.

If the vehicle has already had alternator work done, confirm the physical match rather than relying on appearance alone. Differences in mount centre-to-centre measurement, hole diameter, or pulley offset can be enough to make a part unsuitable even when the electrical rating looks correct.

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 1986A00955 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, Mount Leg Thickness 56mm, Pivot Hole Diameter 11, Pulley Outside Diameter 62mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 156mm, Fastening Type Single pivoted lever.

Additional published details for cross-checking include Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 20, Manufactured in China, Product Group 2 ALTERNATORS, Part No. 1986A00955, Brand BOSCH, Description Bosch Alternator 12V 200A, Adjusting Hole Diameter 11, Pin Code IR189.

Bosch Alternator 12V 200A. Part number 1986A00955 should be checked first. Listed voltage is 12. Listed output rating is 200. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Single Leg. Regulator type is Internal. Pulley configuration is 8 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 1986A00955, 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: Please confirm fitment using part number 1986A00955 and the listed application details, including 12V 200A output, internal regulator, single leg mount, 8 groove pulley, and clockwise rotation, before ordering.

FAQ

What is the part number for this Bosch alternator?

The listed part number is 1986A00955.

What voltage and amperage is this alternator rated at?

It is rated at 12V and 200A.

Does this alternator have an internal regulator?

Yes. The regulator type is listed as internal.

What pulley details are listed for this alternator?

It has an 8 groove pulley with a 62mm outside diameter.

What mounting details are provided?

The listed mounting details are a single leg alternator mount, 56mm mount leg thickness, 156mm mount centre-to-centre, and 11mm pivot and adjusting hole diameters.

What fitment information is supplied?

Fitment data provided includes JOHN DEERE SERIES 8 and JOHN DEERE SERIES 8 2011. The part number and all listed physical details should still be checked against the vehicle before purchase.