Bosch Alternator 12V 120A Twin Leg 6 Groove - Part No. 1986A01176

The Bosch Alternator 12V 120A is a new rotating electrical unit with a 12 volt output, 120 amp charge current, and part number 1986A01176. It is listed with a twin leg alternator mount and double pivot lever fastening type, so the physical mounting style is an important check before purchase.

This alternator uses a 6 groove pulley section and clockwise rotation, and it is specified as an alternator type excl. vacuum pump. Those details matter when comparing against the unit already fitted to the vehicle, particularly where belt alignment, mounting pattern, or accessory drive setup needs to match.

Manufactured in Spain and sold as each, this Bosch unit is covered by a 12 month warranty. The listed packaging dimensions are 24 x 18.5 x 20, and the recommended additional repair item is the V-Belt/V-Ribbed Belt, which is worth assessing at the same time if the charging system has been open for service.

Key Features

• 12V alternator with 120A charge current
• New Bosch unit, part number 1986A01176
• 6 groove pulley section
• Twin leg alternator mount
• Clockwise rotation
• Alternator type: excl. vacuum pump

Specifications

• Brand: Bosch
• Product type: Alternator
• Voltage: 12V
• Charge current / power rating: 120A
• Part No.: 1986A01176
• Rotation: CW
• Pulley section: 6 groove
• Alternator mount: Twin leg

Fitment information

• BMW Z4
• BMW Z4 2003
• BMW Z4 2004
• BMW Z4 2005
• BMW Z4 2006

Application and Buying Notes

Before ordering, match the part number 1986A01176, the 12V rating, and the 120A charge current against the alternator you are replacing. If the existing unit differs in pulley section, rotation, or mounting style, the replacement may not line up correctly even if it looks similar at a glance.

The listed twin leg mount and double pivot lever fastening type are useful confirmation points for BMW Z4 applications shown against this part. The alternator is also specified as excl. vacuum pump, so it should only be compared with vehicles and systems that use that alternator arrangement.

The 6 groove pulley section is another key detail. If the belt drive on the vehicle uses a different groove count or there is visible belt wear, it is sensible to inspect the V-Belt/V-Ribbed Belt at the same time, as that is the recommended additional repair item for this alternator.

Bosch lists this as a new alternator, not a remanufactured unit, and it carries a 12 month warranty. For a clean install, compare the old unit’s mounting points, pulley layout, and electrical output rating before fitting, particularly where previous repairs or non-original parts may have been used.

Packaging dimensions are provided as 24 x 18.5 x 20, which can help with handling and freight planning. As with any charging system component, the safest approach is to confirm the vehicle application, the part number, and the physical specifications together rather than relying on one detail 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 1986A01176 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, Pulley Section 6 Groove, Suits Unit Make Bosch, Alternator Mount Twin Leg, Alternator Charge Current [A] 120, Alternator Type excl. vacuum pump, Packaging length 24, Packaging height 20.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. 1986A01176, Brand BOSCH, Description Bosch Alternator 12V 120A, Power Rating (Amp) 120, Rotation CW, Voltage 12, New / Reman. New, Fastening Type Double Pivot Lever.

Bosch Alternator 12V 120A. Part number 1986A01176 should be checked first. Listed voltage is 12. Listed output rating is 120. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. 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 1986A01176, 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 checking part number 1986A01176, the 12V 120A specification, the twin leg mount, the 6 groove pulley, and the listed BMW Z4 applications before purchase.

FAQ

What is the part number for this alternator?

The listed part number is 1986A01176. For this listing, part number 1986A01176 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include BMW Z4, BMW Z4 2003, BMW Z4 2004. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured alternator?

It is listed as new. For this listing, part number 1986A01176 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include BMW Z4, BMW Z4 2003, BMW Z4 2004. These details should still be checked against the original unit before ordering.

What electrical output does it have?

It is a 12V alternator with a 120A charge current. For this listing, part number 1986A01176 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include BMW Z4, BMW Z4 2003, BMW Z4 2004. These details should still be checked against the original unit before ordering.

What type of pulley does it use?

It has a 6 groove pulley section. For this listing, part number 1986A01176 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include BMW Z4, BMW Z4 2003, BMW Z4 2004. These details should still be checked against the original unit before ordering.

Which vehicle applications are shown for this part?

The provided fitment data shows BMW Z4 applications, including 2003, 2004, 2005, and 2006. For this listing, part number 1986A01176 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include BMW Z4, BMW Z4 2003, BMW Z4 2004. These details should still be checked against the original unit before ordering.

What should I check before ordering?

Check the part number 1986A01176, the 12V and 120A rating, the twin leg mount, the double pivot lever fastening type, the 6 groove pulley, and the BMW Z4 application details. For this listing, part number 1986A01176 is the main reference point. Listed voltage is 12. Listed output rating is 120. Published fitment references include BMW Z4, BMW Z4 2003, BMW Z4 2004. These details should still be checked against the original unit before ordering.