Bosch Alternator 12V 110A 1986A01070

Bosch Alternator 12V 110A, part number 1986A01070, is a rotating electrical replacement unit with a 110 amp charge current and internal regulator. It is supplied as a 12 volt alternator and is listed as the excl. vacuum pump type, so the vehicle application needs to match that construction before purchase.

This alternator uses a 6 groove pulley, clockwise rotation, and a quad leg alternator mount with double pivot lever fastening. The listed mounting dimensions are 61mm inside mounting legs, 128mm mount centre to centre, and an 8.5 / M8 pivot hole diameter, which are the practical checks a buyer should confirm against the vehicle already fitted.

Bosch lists premium internal components including long lasting bearings and non-recycled copper, and the unit weighs 6.400kg. The recommended additional repair is the V-Belt/V-Ribbed Belt, which is worth checking at the same time if the existing belt shows wear or glazing.

For workshop or driveway replacement, the key points are the 12V system, 110A output, 56mm pulley outside diameter, CW rotation, and the exact part number 1986A01070. Those details matter because alternators that look similar can still differ in mounting, pulley layout, regulator type, or whether they are built for applications with or without a vacuum pump.

Key Features

• Bosch alternator, part number 1986A01070
• 12V system with 110A charge current
• Internal regulator
• 6 groove pulley
• Clockwise rotation
• Excl. vacuum pump design

Specifications

• Brand: Bosch
• Part No.: 1986A01070
• Voltage: 12V
• Power rating / charge current: 110A
• Pulley section: 6 groove
• Pulley outside diameter: 56mm
• Rotation: CW
• Alternator type: excl. vacuum pump

Verified fitment guidance

• Fitment information supplied includes AUDI A1 and AUDI A3 applications.
• Fitment information supplied includes SKODA OCTAVIA, SKODA ROOMSTER, and SKODA YETI applications.
• Fitment information supplied includes VOLKSWAGEN CADDY, CRAFTER 30-35, CRAFTER 30-50, EOS, GOLF, JETTA, LT 28-35, LT 28-46, PASSAT, and POLO applications.
• Sample applications provided include AUDI A1 2011, 2012, and 2013, plus SKODA OCTAVIA 2004 to 2013 and VOLKSWAGEN CADDY 2004 to 2014.
• Fitment should still be confirmed against the vehicle's existing alternator, mounting points, pulley style, and whether the vehicle uses the excl. vacuum pump configuration.

Application and Buying Notes

Before ordering, check the part number 1986A01070 against the alternator currently fitted to the vehicle. The important matching points here are 12V, 110A, CW rotation, 6 groove pulley, internal regulator, and the excl. vacuum pump design, because any one of those can affect whether the unit physically and electrically suits the application.

Mounting dimensions are just as important as output. This alternator is listed with a quad leg mount, 61mm inside mounting legs, 128mm mount centre to centre, and an 8.5 / M8 pivot hole diameter. If the bolt spacing or pulley alignment differs from the existing unit, the part may not install correctly even if the vehicle family appears similar.

The 56mm pulley outside diameter and 6 groove pulley section should be checked against the belt system on the vehicle. Bosch also recommends considering the V-Belt/V-Ribbed Belt as an additional repair, which is sensible if the belt has age, cracking, noise, or visible wear.

This alternator weighs 6.400kg and carries a 12 months warranty. That gives a useful benchmark for comparison during inspection, but the safest buying method is still to match the part number, the regulator type, the mounting arrangement, and the application details together rather than relying on appearance alone.

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 1986A01070 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 IR139, Power Rating (Amp) 110, Pulley Section 6 Groove, Rotation CW, Alternator Mount Quad Leg, Alternator Charge Current [A] 110, Alternator Type excl. vacuum pump.

Additional published details for cross-checking include Weight 6.400kg, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A01070, Brand BOSCH, Description Bosch Alternator 12V 110A, Inside Mounting Legs 61mm, Pivot Hole Diameter 8.5 / M8, Pulley Outside Diameter 56mm, Regulator Type Internal, Voltage 12.

Bosch Alternator 12V 110A. Part number 1986A01070 should be checked first. Listed voltage is 12. Listed output rating is 110. 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 1986A01070, 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 using part number 1986A01070, the 12V 110A rating, CW rotation, 6 groove pulley, internal regulator, and the excl. vacuum pump mounting/application details before ordering.

FAQ

What is the part number for this Bosch alternator?

The listed part number is 1986A01070.

Is this alternator 12 volt?

Yes. It is listed as a 12V alternator.

What is the charge current?

The alternator is listed at 110A charge current.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What pulley and rotation details should I check?

It has a 6 groove pulley, 56mm pulley outside diameter, and clockwise rotation.

Is fitment confirmed for my vehicle from the information provided?

Only the listed application families and sample applications are supplied, including AUDI A1, AUDI A3, SKODA OCTAVIA, SKODA ROOMSTER, SKODA YETI, and several VOLKSWAGEN models. Final fitment should still be confirmed against the existing unit and the part number 1986A01070.