Bosch Alternator 12V 150A 1986A00946

This Bosch alternator is a 12V unit with a 150A power rating, supplied under part number 1986A00946. It is built as a rotating electrical component for vehicle charging systems, with an internal regulator and clockwise rotation. If you are replacing an alternator and need to match voltage, output, pulley arrangement, and mounting style, these are the key details to check before ordering.

The alternator uses a 9 groove pulley with a 77mm outside diameter, plus a single leg alternator mount and a 56mm mount leg thickness. Those physical details matter as much as the electrical rating, because the unit has to align correctly with the belt system and mounting points as well as suit the vehicle’s charging requirements.

Bosch lists this alternator as being made from high quality raw materials for long life and optimal performance. It is sold as each, carries a 12 month warranty, and is identified as Bosch part number 1986A00946. For a replacement alternator, matching the exact part number and the listed measurements is the most reliable way to avoid delays and incompatibility.

Key Features

• 12V alternator with 150A output
• Bosch part number 1986A00946
• Internal regulator
• 9 groove pulley
• 77mm pulley outside diameter
• Single leg alternator mount

Specifications

• Brand: Bosch
• Product type: Alternator
• Voltage: 12V
• Power rating: 150A
• Part number: 1986A00946
• Pin code: IR165
• Pulley outside diameter: 77mm
• Pulley section: 9 groove

Application and Buying Notes

Before buying, compare the Bosch part number 1986A00946 with the alternator removed from the vehicle or with the vehicle’s parts listing. Alternators can look similar while differing in output, pulley size, groove count, regulator type, or mounting arrangement, and any one of those differences can affect installation.

This unit is specified as 12V and 150A, with an internal regulator, IR165 pin code, CW rotation, a 77mm 9 groove pulley, and a single leg mount. Those details should all be checked together, especially if the existing alternator has a different pulley section, different mounting leg thickness, or a different rotation direction.

The 56mm mount leg thickness is a useful measurement when confirming physical fit, along with the single leg alternator mount. If the old alternator is unavailable, measure carefully and compare the full set of listed specifications rather than relying on appearance alone.

If the charging system calls for a different output level, pulley setup, or regulator arrangement, this alternator may not be the correct choice. Matching the electrical rating and the mechanical dimensions is the safest way to select the right replacement 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 1986A00946 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, Pin Code IR165, Pulley Outside Diameter 77mm, Regulator Type Internal, Voltage 12, Product Group 2 ALTERNATORS, Part No. 1986A00946.

Additional published details for cross-checking include Brand BOSCH, Description Bosch Alternator 12V 150A, Mount Leg Thickness 56mm, Power Rating (Amp) 150, Pulley Section 9 Groove, Rotation CW, Alternator Mount Single Leg, Product Group 1 ROTATING ELECTRICAL.

Bosch Alternator 12V 150A. Part number 1986A00946 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 Single Leg. Regulator type is Internal. Pulley configuration is 9 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 1986A00946, 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 by matching Bosch part number 1986A00946, 12V 150A output, IR165 pin code, 77mm 9 groove pulley, internal regulator, CW rotation, single leg mount, and 56mm mount leg thickness against the vehicle application and the removed unit before purchase.

FAQ

What is the voltage and output of this alternator?

It is a 12V alternator with a 150A power rating. For this listing, part number 1986A00946 is the main reference point. Listed voltage is 12. Listed output rating is 150. These details should still be checked against the original unit before ordering.

What is the Bosch part number?

The Bosch part number is 1986A00946. For this listing, part number 1986A00946 is the main reference point. Listed voltage is 12. Listed output rating is 150. These details should still be checked against the original unit before ordering.

Does this alternator have an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number 1986A00946 is the main reference point. Listed voltage is 12. Listed output rating is 150. These details should still be checked against the original unit before ordering.

What pulley details are listed?

It has a 77mm pulley outside diameter and a 9 groove pulley section. For this listing, part number 1986A00946 is the main reference point. Listed voltage is 12. Listed output rating is 150. These details should still be checked against the original unit before ordering.

What mounting and rotation details should be checked?

The alternator mount is listed as single leg, the mount leg thickness is 56mm, and the rotation is clockwise. For this listing, part number 1986A00946 is the main reference point. Listed voltage is 12. Listed output rating is 150. These details should still be checked against the original unit before ordering.

Is there a warranty on this alternator?

Yes. The listed warranty is 12 months. For this listing, part number 1986A00946 is the main reference point. Listed voltage is 12. Listed output rating is 150. These details should still be checked against the original unit before ordering.