Bosch Alternator 12V 120A Part No. 1986A00818

This Bosch alternator is a 12V unit with a 120A alternator charge current and part number 1986A00818. It is listed as an alternator type excl. vacuum pump, with a double pivot lever fastening type and a 12 months warranty.

The stated application is Holden Astra AH with the 1.8L Z18XER engine. That fitment detail is the key check before purchase, especially where the vehicle build, charging system configuration, or existing alternator type may differ.

For replacement work, the listed recommended additional repair is V-Belt/V-Ribbed Belt. That is worth noting during diagnosis, because belt condition and belt compatibility can affect installation quality and charging performance after the alternator is fitted.

Key Features

• Bosch alternator
• 12V system
• 120A charge current
• Part No. 1986A00818
• Excludes vacuum pump
• Double pivot lever fastening

Specifications

• Brand: Bosch
• Product type: Alternator
• Unit of measure: Each
• Alternator charge current: 120A
• Alternator type: Excl. vacuum pump
• Fastening type: Double pivot lever
• Manufactured in: China
• Packaging dimensions: 23.9 x 20 x 20

Confirmed fitment

• Holden Astra AH with 1.8L Z18XER engine

Application and Buying Notes

Before ordering, compare the part number 1986A00818 and the vehicle application details with the alternator currently fitted to the vehicle. The confirmed application supplied is Holden Astra AH with the 1.8L Z18XER engine, so that engine code is the main compatibility checkpoint.

This alternator is specified as 12V and 120A, which needs to match the vehicle’s charging system requirements. The note excl. vacuum pump is also important, because alternators with and without a vacuum pump are not interchangeable unless the application specifically supports it.

The fastening type is listed as double pivot lever. That means the physical mounting arrangement should be checked against the existing unit before the job begins, along with belt condition and pulley alignment where the V-Belt or V-Ribbed Belt is being reused or renewed.

If the old alternator has been removed already, use the part number, mounting style, and engine code together rather than relying on appearance alone. Alternators can look similar across different variants, but the 120A output and excl. vacuum pump specification are practical identifiers that help avoid a mismatch.

The 12 months warranty provides a clear baseline for this replacement part, but it does not replace fitment checking. Final compatibility should be confirmed against the vehicle details, existing alternator configuration, and any additional repair items needed during installation.

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 1986A00818 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, 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. 1986A00818, Brand BOSCH.

Additional published details for cross-checking include Description Bosch Alternator 12V 120A, Alternator Charge Current [A] 120, Alternator Type excl. vacuum pump, Packaging length 23.9, Packaging height 20, Product Group 2 ALTERNATORS.

Bosch Alternator 12V 120A. Part number 1986A00818 should be checked first. Listed output rating is 120. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986A00818, 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 output 120 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment using part number 1986A00818, the Holden Astra AH 1.8L Z18XER application, the 12V 120A specification, and the excl. vacuum pump mounting configuration before purchase.

FAQ

What vehicle is this alternator listed for?

It is listed for Holden Astra AH with the 1.8L Z18XER engine. For this listing, part number 1986A00818 is the main reference point. Listed output rating is 120. Published fitment references include HOLDEN ASTRA, HOLDEN ASTRA 2007, HOLDEN ASTRA 2008. These details should still be checked against the original unit before ordering.

What is the part number?

The part number is 1986A00818. For this listing, part number 1986A00818 is the main reference point. Listed output rating is 120. Published fitment references include HOLDEN ASTRA, HOLDEN ASTRA 2007, HOLDEN ASTRA 2008. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 120A charge current. For this listing, part number 1986A00818 is the main reference point. Listed output rating is 120. Published fitment references include HOLDEN ASTRA, HOLDEN ASTRA 2007, HOLDEN ASTRA 2008. These details should still be checked against the original unit before ordering.

Does it include a vacuum pump?

No. The alternator type is listed as excl. vacuum pump. For this listing, part number 1986A00818 is the main reference point. Listed output rating is 120. Published fitment references include HOLDEN ASTRA, HOLDEN ASTRA 2007, HOLDEN ASTRA 2008. These details should still be checked against the original unit before ordering.

What mounting style is specified?

The fastening type is listed as double pivot lever. For this listing, part number 1986A00818 is the main reference point. Listed output rating is 120. Published fitment references include HOLDEN ASTRA, HOLDEN ASTRA 2007, HOLDEN ASTRA 2008. These details should still be checked against the original unit before ordering.

Is there a warranty?

Yes. The listed warranty is 12 months. For this listing, part number 1986A00818 is the main reference point. Listed output rating is 120. Published fitment references include HOLDEN ASTRA, HOLDEN ASTRA 2007, HOLDEN ASTRA 2008. These details should still be checked against the original unit before ordering.