Bosch Alternator 12V 140A 1986A00894

This Bosch alternator is a 12V, 140A unit with part number 1986A00894. It is a new alternator, supplied each, and it uses an internal regulator. The alternator is listed as excluding vacuum pump applications, so the mounting and engine layout need to match the unit already fitted to the vehicle.

Key mounting details include a quad leg alternator mount, inside mounting legs of 61mm, mount centre to centre of 127mm, and pivot and adjusting hole diameters of M8x1.25 / 9. The pulley is a 6 groove type with a 50mm outside diameter and clockwise rotation. These are the sort of measurements that matter when confirming a replacement alternator.

The unit is made by Bosch, with a 12 months warranty, and it is listed as manufactured in China. It suits Bosch applications and is identified as a rotating electrical component. For buyers comparing options, the amp rating, pulley type, regulator type, and mounting pattern are the main points to verify before ordering.

Key Features

• 12V alternator with 140A charge current
• Internal regulator
• 6 groove pulley, 50mm outside diameter
• Clockwise rotation
• Quad leg alternator mount
• New unit, supplied each

Specifications

• Brand: Bosch
• Product type: Alternator
• Voltage: 12V
• Power rating: 140A
• Alternator type: excludes vacuum pump
• Regulator type: Internal
• Pulley section: 6 groove
• Pulley outside diameter: 50mm

Fitment guidance

• Fitment data provided includes Audi A1 and Audi A3 applications.
• Fitment data provided includes Skoda Fabia, Octavia, Rapid, Superb and Yeti applications.
• Fitment data provided includes Volkswagen Beetle, Golf, Jetta, Polo and Tiguan applications.
• Sample fitment years shown include Audi A1 2010 to 2015, Skoda Fabia 2010 to 2014, Volkswagen Beetle 2011 to 2016, and Volkswagen Golf 2003 to 2006.
• Because the alternator is listed with specific mount, pulley, and rotation details, the existing unit should be checked against these measurements before purchase.

Application and Buying Notes

When replacing an alternator, matching the part number 1986A00894 is the safest starting point, then confirming the physical details on the vehicle. This unit is 12V, 140A, uses an internal regulator, and has a 6 groove pulley with a 50mm outside diameter. If the fitted alternator differs in pulley section, mount style, or rotation, it is not the right direct match.

The mounting details are important on this unit. It is listed as a quad leg alternator mount with inside mounting legs of 61mm, mount centre to centre of 127mm, and M8x1.25 / 9 pivot and adjusting holes. These measurements should be compared carefully with the removed alternator, especially where space is tight or the bracket arrangement is specific to the vehicle.

This alternator is listed as excluding vacuum pump applications, so vehicles or engine variants that use a vacuum pump on the alternator assembly need extra care. The listing also notes a recommendation for additional repairs of the V-belt or V-ribbed belt, which is worth considering if the belt is worn, glazed, or due for replacement at the same time.

For buyers working from vehicle details rather than a removed part, the make and model references supplied are a guide only. Confirm the vehicle application, the original alternator layout, and the part number before ordering. Matching the Bosch unit, voltage, charge current, pulley section, and mounting pattern will reduce the chance of receiving an incorrect alternator.

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 1986A00894 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, Pivot Hole Diameter M8x1.25 / 9, Pulley Outside Diameter 50mm, Regulator Type Internal, Suits Unit Make Bosch, Alternator Mount Quad Leg, New / Reman. New.

Additional published details for cross-checking include Fastening Type Double Pivot Lever, Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 20, Manufactured in China, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A00894, Brand BOSCH, Description Bosch Alternator 12V 140A, Adjusting Hole Diameter M8x1.25 / 9, Pin Code IR139.

Bosch Alternator 12V 140A. Part number 1986A00894 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. 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 1986A00894, 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 1986A00894 and the listed application details, including 12V, 140A, internal regulator, 6 groove pulley, CW rotation, and quad leg mounting measurements before purchase.

FAQ

What is the part number for this Bosch alternator?

The part number listed is 1986A00894.

What electrical rating does this alternator have?

It is a 12V alternator with a 140A charge current and 140A power rating.

Does this alternator have an internal regulator?

Yes. The regulator type is listed as internal.

What pulley type does it use?

It uses a 6 groove pulley with a 50mm outside diameter.

Which vehicles are shown in the fitment data?

The fitment data includes Audi A1 and A3, Skoda Fabia, Octavia, Rapid, Superb and Yeti, plus Volkswagen Beetle, Golf, Jetta, Polo and Tiguan applications.

What should I check before ordering?

Confirm the part number 1986A00894, the 12V 140A rating, internal regulator, CW rotation, 6 groove pulley, and the mounting measurements including 61mm inside mounting legs and 127mm mount centre to centre.