Bosch Alternator 12V 140A 1986A00908

The Bosch Alternator 12V 140A is a new rotating electrical component supplied as each, with part number 1986A00908. It is rated at 140 amps and 12 volts, and it uses a 6 groove pulley with a 50 mm outside diameter.

This unit is listed as an alternator type excluding vacuum pump, with clockwise rotation (CW), a quad leg alternator mount, and a double pivot lever fastening type. The inside mounting legs measure 61 mm, with a mount centre-to-centre distance of 127 mm.

It is a Bosch unit made in China and carries a 12 month warranty. The listed pin code is IR139, and the adjusting hole diameter is M8x1.25 / 9, which are useful checks when comparing against the original unit before ordering.

Key Features

• 12V alternator with 140A charge current
• New unit, supplied each
• 6 groove pulley with 50 mm outside diameter
• Clockwise rotation (CW)
• Quad leg alternator mount
• Excludes vacuum pump

Specifications

• Brand: Bosch
• Part No.: 1986A00908
• Voltage: 12V
• Power rating: 140A
• Alternator type: excl. vacuum pump
• Rotation: CW
• Pulley section: 6 groove
• Pulley outside diameter: 50 mm

Application and Buying Notes

Before ordering, compare the part number 1986A00908, the Bosch identification, and the physical mounting details on your original alternator. The key match points here are the 12V system, 140A output, CW rotation, quad leg mount, 61 mm inside mounting legs, and 127 mm mount centre-to-centre spacing.

The pulley arrangement also matters. This alternator uses a 6 groove pulley with a 50 mm outside diameter, so it should only be considered where the belt alignment and pulley profile match the vehicle’s existing setup. The listed adjusting hole diameter is M8x1.25 / 9, which is another practical check during comparison.

Because this unit is described as excluding a vacuum pump, it is not suitable where the original alternator incorporates that feature. If the vehicle uses a different mounting style, pulley count, rotation direction, or connector arrangement, the correct replacement may be different even if the alternator looks similar.

The product is sold as a new Bosch alternator with a 12 month warranty. If the existing belt shows wear, the recommended additional repair is a V-Belt or V-Ribbed Belt, which is sensible to assess at the same time as the charging system repair.

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 1986A00908 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 61mm, Power Rating (Amp) 140, Pulley Section 6 Groove, Suits Unit Make Bosch, Alternator Mount Quad Leg, New / Reman. New, Fastening Type Double Pivot Lever.

Additional published details for cross-checking include Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 20, Manufactured in China, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A00908, Brand BOSCH, Description Bosch Alternator 12V 140A, Adjusting Hole Diameter M8x1.25 / 9, Pin Code IR139, Pulley Outside Diameter 50mm.

Bosch Alternator 12V 140A. Part number 1986A00908 should be checked first. Listed voltage is 12. Listed output rating is 140. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Quad Leg. 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 1986A00908, 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 140 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by matching part number 1986A00908, 12V 140A rating, CW rotation, quad leg mount, pulley details, and the vehicle’s original alternator application before purchasing.

FAQ

Is this alternator new or remanufactured?

It is listed as new, not remanufactured. For this listing, part number 1986A00908 is the main reference point. Listed voltage is 12. Listed output rating is 140. These details should still be checked against the original unit before ordering.

What is the voltage and output rating?

The alternator is 12V with a 140A charge current rating. For this listing, part number 1986A00908 is the main reference point. Listed voltage is 12. Listed output rating is 140. These details should still be checked against the original unit before ordering.

Does it have a vacuum pump?

No. The alternator type is listed as excluding vacuum pump. For this listing, part number 1986A00908 is the main reference point. Listed voltage is 12. Listed output rating is 140. These details should still be checked against the original unit before ordering.

What pulley does it use?

It uses a 6 groove pulley with a 50 mm outside diameter. For this listing, part number 1986A00908 is the main reference point. Listed voltage is 12. Listed output rating is 140. These details should still be checked against the original unit before ordering.

What mounting details are listed?

The listed mounting details are quad leg alternator mount, 61 mm inside mounting legs, 127 mm mount centre-to-centre, and a double pivot lever fastening type. For this listing, part number 1986A00908 is the main reference point. Listed voltage is 12. Listed output rating is 140. These details should still be checked against the original unit before ordering.

What should be checked before ordering?

Match the part number 1986A00908, the Bosch brand, 12V 140A rating, CW rotation, pulley details, and mounting measurements against the original unit. For this listing, part number 1986A00908 is the main reference point. Listed voltage is 12. Listed output rating is 140. These details should still be checked against the original unit before ordering.