Bosch Alternator 12V 85A 0986AN0531

This Bosch alternator is a 12V, 85A unit supplied new, with part number 0986AN0531. It is listed as a single-leg alternator with an internal regulator, making the electrical and mounting details important to confirm before purchase.

Key physical details include a 172mm mount centres B dimension, 68mm pulley outside diameter, 17 shaft dimension, M8 x 1.25 adjusting hole diameter, and 10 pivot hole diameter. The pulley section is A, and the pin code is IR110.

It is backed by a one year warranty and is described as a Bosch unit made with premium internal components, including long lasting bearings and non-recycled copper. Those points matter most when you are matching an alternator by specification rather than by guesswork.

Key Features

• Bosch alternator, 12V 85A
• New unit
• Internal regulator
• Single-leg alternator mount
• Pulley section A
• Part number 0986AN0531

Specifications

• Voltage: 12V
• Power rating: 85A
• Type: alternator
• Unit of measure: each
• Brand: Bosch
• Suits unit make: Bosch
• New / remanufactured: new
• Regulator type: internal

Confirmed fitment references

• CHAMBERLAIN 306
• CHAMBERLAIN 3380
• CHAMBERLAIN 4080
• CHAMBERLAIN 4090
• CHAMBERLAIN 4280
• CHAMBERLAIN 4280B
• CHAMBERLAIN 4290
• CHAMBERLAIN 4480

Application and Buying Notes

For alternators, the safest way to buy is to match the part number 0986AN0531, the 12V system requirement, and the 85A output before looking at anything else. The mounting style also matters here, because this unit is a single-leg alternator with 172mm mount centres B, a 10 pivot hole diameter, and an M8 x 1.25 adjusting hole diameter.

The pulley details are equally important. This alternator uses an A section pulley with a 68mm outside diameter, so the belt type and pulley profile need to line up with the application. If the existing unit differs in shaft dimension, pulley section, or mount leg thickness, do not assume it will swap straight over.

The listed fitment references include CHAMBERLAIN, HSV STATESMAN, and SAME applications, but the fitment information is broad and should still be checked against the exact vehicle or machine application. Year references appear in the fitment data for some entries, such as CHAMBERLAIN 306, HSV STATESMAN, and SAME VIGNERON, but the correct match should always be confirmed against the full application details.

Because this is a rotating electrical component, the regulator type, pin code, and mounting dimensions are all relevant when comparing to the original unit. The internal regulator and IR110 pin code are specific details that can help avoid ordering the wrong alternator for a vehicle that uses a different electrical arrangement.

If you are replacing an existing Bosch alternator, compare the original part number, connector details, mount style, and pulley measurements before ordering. The unit is supplied new and carries a one year warranty, but correct application matching still depends on the vehicle or machine specification, not just the brand name.

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 0986AN0531 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 One Year, Mount Centres B 172mm, Pin Code IR110, Power Rating (Amp) 85, Pulley Section A, Suits Unit Make Bosch, Alternator Mount Single Leg, Shaft Dimension 17.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. 0986AN0531, Brand BOSCH, Description Bosch Alternator 12V 85A, Adjusting Hole Diameter M8 x 1.25, Mount Leg Thickness 56mm, Pivot Hole Diameter 10, Pulley Outside Diameter 68mm, Regulator Type Internal, Voltage 12.

Bosch Alternator 12V 85A. Part number 0986AN0531 should be checked first. Listed voltage is 12. Listed output rating is 85. 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 A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 0986AN0531, 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 fitment by comparing part number 0986AN0531, 12V/85A specification, internal regulator, IR110 pin code, mounting dimensions, and pulley measurements against the original unit and application details.

FAQ

Is this alternator new or remanufactured?

It is listed as a new Bosch alternator. For this listing, part number 0986AN0531 is the main reference point. Listed voltage is 12. Listed output rating is 85. Published fitment references include CHAMBERLAIN 306, CHAMBERLAIN 306 1966, CHAMBERLAIN 306 1967. These details should still be checked against the original unit before ordering.

What is the voltage and output?

This unit is 12V with an 85A power rating. For this listing, part number 0986AN0531 is the main reference point. Listed voltage is 12. Listed output rating is 85. Published fitment references include CHAMBERLAIN 306, CHAMBERLAIN 306 1966, CHAMBERLAIN 306 1967. These details should still be checked against the original unit before ordering.

What is the part number?

The part number is 0986AN0531. For this listing, part number 0986AN0531 is the main reference point. Listed voltage is 12. Listed output rating is 85. Published fitment references include CHAMBERLAIN 306, CHAMBERLAIN 306 1966, CHAMBERLAIN 306 1967. These details should still be checked against the original unit before ordering.

Does it use an internal regulator?

Yes. The regulator type is internal. For this listing, part number 0986AN0531 is the main reference point. Listed voltage is 12. Listed output rating is 85. Published fitment references include CHAMBERLAIN 306, CHAMBERLAIN 306 1966, CHAMBERLAIN 306 1967. These details should still be checked against the original unit before ordering.

What mounting details are listed?

Listed mounting details include single-leg alternator mount, 172mm mount centres B, 56mm mount leg thickness, 10 pivot hole diameter, and M8 x 1.25 adjusting hole diameter. For this listing, part number 0986AN0531 is the main reference point. Listed voltage is 12. Listed output rating is 85. Published fitment references include CHAMBERLAIN 306, CHAMBERLAIN 306 1966, CHAMBERLAIN 306 1967. These details should still be checked against the original unit before ordering.

What warranty is supplied?

It carries a one year warranty. For this listing, part number 0986AN0531 is the main reference point. Listed voltage is 12. Listed output rating is 85. Published fitment references include CHAMBERLAIN 306, CHAMBERLAIN 306 1966, CHAMBERLAIN 306 1967. These details should still be checked against the original unit before ordering.