Bosch Alternator 12V 150A 1986A00909

Bosch alternator, 12V and 150A, part number 1986A00909. This unit is supplied as an alternator only and uses an internal regulator, with a pad mount and direct fastening arrangement. It is listed as an excl. vacuum pump type, so the physical style needs to match the vehicle application before purchase.

The electrical specification is 150A charge current at 12 volts, with a 6 groove pulley section. Mounting dimensions listed are 8/9.5 mm for both the adjusting hole diameter and pivot hole diameter. These details are important when comparing the unit against the existing alternator on the vehicle.

A key compatibility point is that this unit will NOT replace a Valeo 120 Amp unit. That note should be checked carefully against the current alternator fitted to the vehicle, along with the part number 1986A00909 and the mounting and pulley details. Manufactured in Spain and supplied with a 12 month warranty.

For buyers comparing replacement options, the most useful identifiers here are Bosch brand, 12V, 150A, internal regulator, pad mount, direct fastening, and 6 groove pulley. Packaging dimensions are 28 cm long and 22.5 cm high and wide, and the unit is sold each.

Key Features

• Bosch alternator
• 12V output
• 150A charge current
• Internal regulator
• Pad mount with direct fastening
• 6 groove pulley section

Specifications

• Part No.: 1986A00909
• Brand: Bosch
• Product type: Alternator
• Power rating: 150 amp
• Alternator charge current: 150A
• Voltage: 12V
• Regulator type: Internal
• Alternator mount: Pad

Vehicle compatibility guidance

• BMW: 3, 3 2001, 3 2002, 3 2003, 3 2004, plus other listed applications

Application and Buying Notes

Before ordering, compare the existing alternator to Bosch part number 1986A00909 and check that the vehicle uses a 12V, 150A unit with an internal regulator. The mount type is listed as pad with direct fastening, and the pulley is a 6 groove type, so those details need to line up with the alternator already fitted.

This alternator is listed as excl. vacuum pump, which is a critical difference when matching replacement parts. It is also specifically noted that the unit will NOT replace a Valeo 120 Amp unit, so a direct swap should not be assumed just because the mounting points look similar.

The most practical way to avoid a mismatch is to compare the part number, voltage, amperage, pulley section, and hole sizes against the removed unit. The adjusting and pivot hole diameters are both listed as 8/9.5 mm, which can help confirm whether the bracket and fixing arrangement are the same.

If the vehicle has been fitted with a different brand, different output rating, or a Valeo 120A alternator, stop and verify the application first. Alternators can look close in photos but still differ in regulator type, mounting style, and pulley configuration, so the exact specification matters as much as the model family.

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 1986A00909 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 IR148, Power Rating (Amp) 150, Regulator Type Internal, Note This unit will NOT replace Valeo 120 Amp unit, Alternator Charge Current [A] 150, Alternator Type excl. vacuum pump, Packaging length 28.

Additional published details for cross-checking include Packaging height 22.5, Product Group 2 ALTERNATORS, Part No. 1986A00909, Brand BOSCH, Description Bosch Alternator 12V 150A, Adjusting Hole Diameter 8/9.5, Pivot Hole Diameter 8/9.5, Pulley Section 6 Groove, Voltage 12.

Bosch Alternator 12V 150A. Part number 1986A00909 should be checked first. Listed voltage is 12. Listed output rating is 150. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. 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 1986A00909, 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 voltage 12 and output 150 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment using part number 1986A00909, the 12V 150A specification, the pad mount/direct fastening arrangement, the 6 groove pulley, and the note that this unit will NOT replace a Valeo 120 Amp unit.

FAQ

What is the part number for this alternator?

The part number listed is 1986A00909. For this listing, part number 1986A00909 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include BMW 3, BMW 3 2001, BMW 3 2002. These details should still be checked against the original unit before ordering.

What voltage and amperage does this alternator have?

It is a 12V alternator with a 150A charge current and 150 amp power rating. For this listing, part number 1986A00909 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include BMW 3, BMW 3 2001, BMW 3 2002. These details should still be checked against the original unit before ordering.

Does this alternator have an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number 1986A00909 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include BMW 3, BMW 3 2001, BMW 3 2002. These details should still be checked against the original unit before ordering.

Will this alternator replace a Valeo 120 Amp unit?

No. The listing specifically states that this unit will NOT replace a Valeo 120 Amp unit. For this listing, part number 1986A00909 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include BMW 3, BMW 3 2001, BMW 3 2002. These details should still be checked against the original unit before ordering.

What type of pulley does it use?

It uses a 6 groove pulley section. For this listing, part number 1986A00909 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include BMW 3, BMW 3 2001, BMW 3 2002. These details should still be checked against the original unit before ordering.

What warranty is supplied with this alternator?

The listed warranty is 12 months. For this listing, part number 1986A00909 is the main reference point. Listed voltage is 12. Listed output rating is 150. Published fitment references include BMW 3, BMW 3 2001, BMW 3 2002. These details should still be checked against the original unit before ordering.