Bosch Alternator 12V 120A 1986A01099

The Bosch Alternator 12V 120A is a rotating electrical component supplied as each, with part number 1986A01099 and a 12-month warranty. It is listed as an alternator type excl. vacuum pump, so the mounting and application details need to match the vehicle before purchase.

With a 120A alternator charge current and a double pivot lever fastening type, this unit is aimed at vehicles that require the stated Bosch configuration. The recommended additional repair is a V-Belt or V-Ribbed Belt, which is worth checking at the same time if the belt system is due for service.

Bosch lists this alternator as made from high quality raw materials, corrosion resistant, and fitted with a reduction drive. Those points matter when the part is working in a hot, dirty, high-load engine bay, but the correct application still comes down to matching the part number, type, and physical arrangement.

Key Features

• 12V alternator with 120A charge current
• Bosch part number 1986A01099
• Alternator type: excl. vacuum pump
• Double pivot lever fastening type
• Recommended additional repair: V-Belt/V-Ribbed Belt
• Corrosion resistant construction

Specifications

• Brand: Bosch
• Product type: Alternator
• Voltage: 12V
• Alternator charge current: 120A
• Part No.: 1986A01099
• Warranty: 12 months
• Fastening type: Double Pivot Lever
• Alternator type: Excl. vacuum pump

Fitment guidance

• Fitment details supplied include BMW applications, with references to BMW 3, BMW 5, BMW X5 and BMW Z3
• Sample application references include BMW 3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 and 2006
• Fitment information should be checked against the vehicle’s existing alternator and part number before ordering

Application and Buying Notes

The most important checks on this Bosch unit are the 12V system, 120A output, part number 1986A01099, and the note that it is an alternator excl. vacuum pump. Those details have to line up with the vehicle’s charging system and the alternator that is being replaced.

The fastening type is listed as double pivot lever, so the mounting arrangement needs to be confirmed carefully. Even when a vehicle appears in the fitment list, the physical bracket style and alternator configuration can differ, which is why the part number and mounting style should be matched before fitting.

Bosch recommends a V-Belt or V-Ribbed Belt as an additional repair. That is a practical point to consider if the belt is worn, glazed, cracked, or due for replacement, because a new alternator will only perform as intended if the drive belt system is in good condition.

Corrosion resistance and the reduction drive are useful construction details, but they do not replace application checking. If the existing unit has a vacuum pump, a different fastening arrangement, or a different charge rating, this alternator is not the correct direct replacement.

For workshop or home fitting, compare the old unit against the listed specifications, confirm the belt type, and check the clearance around the alternator housing. The packaging size is 28 x 22.5 x 22.5, which may also be useful when planning storage or freight handling.

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 1986A01099 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 22.5, Manufactured in China, Product Group 1 ROTATING ELECTRICAL, Part No. 1986A01099, 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 28, Packaging height 22.5, Product Group 2 ALTERNATORS.

Bosch Alternator 12V 120A. Part number 1986A01099 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 1986A01099, 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 1986A01099, the 12V 120A specification, the excl. vacuum pump design, and the double pivot lever mounting arrangement before purchase.

FAQ

What is the part number for this Bosch alternator?

The part number listed is 1986A01099. For this listing, part number 1986A01099 is the main reference point. Listed output rating is 120. Published fitment references include BMW 3, BMW 3 1998, BMW 3 1999. These details should still be checked against the original unit before ordering.

What voltage and output does this alternator have?

It is a 12V alternator with a 120A charge current. For this listing, part number 1986A01099 is the main reference point. Listed output rating is 120. Published fitment references include BMW 3, BMW 3 1998, BMW 3 1999. These details should still be checked against the original unit before ordering.

Does this alternator include a vacuum pump?

No. It is listed as alternator type excl. vacuum pump. For this listing, part number 1986A01099 is the main reference point. Listed output rating is 120. Published fitment references include BMW 3, BMW 3 1998, BMW 3 1999. These details should still be checked against the original unit before ordering.

What mounting type is specified?

The fastening type is listed as double pivot lever. For this listing, part number 1986A01099 is the main reference point. Listed output rating is 120. Published fitment references include BMW 3, BMW 3 1998, BMW 3 1999. These details should still be checked against the original unit before ordering.

Is there a recommended additional repair item?

Yes. Bosch lists a V-Belt or V-Ribbed Belt as a recommended additional repair. For this listing, part number 1986A01099 is the main reference point. Listed output rating is 120. Published fitment references include BMW 3, BMW 3 1998, BMW 3 1999. These details should still be checked against the original unit before ordering.

What warranty is supplied with this alternator?

The warranty listed is 12 months. For this listing, part number 1986A01099 is the main reference point. Listed output rating is 120. Published fitment references include BMW 3, BMW 3 1998, BMW 3 1999. These details should still be checked against the original unit before ordering.