Bosch Alternator 12V 180A - 0125811051

This Bosch alternator is a new 12V unit rated at 180A, with part number 0125811051. It uses an internal regulator, pad mount design, and direct fastening, so the key matching points are the electrical output, mounting style, and part number rather than assuming a universal swap.

It is listed as an alternator type excl. vacuum pump and is supplied as each unit. The alternator is manufactured in Spain and carries a one-year warranty, which gives a clear reference point for buyers comparing replacement options for a 12V charging system.

The unit is also noted as requiring the original pulley, so it is important to check what is already fitted to the vehicle before ordering. A correct match depends on the existing pulley arrangement, the 180A charge current, and whether the application calls for a Bosch alternator with the same mounting and regulator setup.

Key Features

• 12V alternator rated at 180A
• Internal regulator type
• Pad mount with direct fastening
• New unit, not remanufactured
• Excl. vacuum pump design
• Requires original pulley

Specifications

• Part No.: 0125811051
• Brand: Bosch
• Product type: Alternator
• Voltage: 12V
• Alternator charge current: 180A
• Power rating: 180A
• Regulator type: Internal
• Alternator mount: Pad

Application and Buying Notes

Before ordering, confirm the part number 0125811051 against the alternator already fitted to the vehicle. The listed 12V, 180A specification, internal regulator, pad mount, and direct fastening details all need to line up with the existing unit for a proper replacement.

This alternator is marked as excl. vacuum pump and will require the original pulley. That means the pulley arrangement on the vehicle matters just as much as the electrical output, particularly where the original pulley is intended to be reused rather than supplied new.

For service planning, it is also worth checking the belt condition at the same time. Recommended additional repairs include V-Belt/V-Ribbed Belt, which is sensible where the alternator is being replaced and access is already open.

The 180A charge current is a useful guide when comparing units, but it should not be treated as the only matching point. Mounting style, regulator type, pulley requirement, and application details all need to be verified together before the part is ordered or fitted.

If the existing alternator has different mounting, a different regulator arrangement, or a different pulley setup, this Bosch unit may not be the correct replacement even if the vehicle uses a 12V charging system. Careful comparison avoids downtime and repeat work.

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 0125811051 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, Regulator Type Internal, Voltage 12, Alternator Mount Pad, Alternator Charge Current [A] 180, Alternator Type excl. vacuum pump, Packaging length 23.9, Packaging height 20.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. 0125811051, Brand BOSCH, Description Bosch Alternator 12V 180A, Power Rating (Amp) 180, Suits Unit Make Bosch, Note Will require original pulley, New / Reman. New, Fastening Type Direct fastening.

Bosch Alternator 12V 180A. Part number 0125811051 should be checked first. Listed voltage is 12. Listed output rating is 180. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. Regulator type is Internal. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 0125811051, 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: Please confirm fitment using part number 0125811051, the 12V 180A rating, pad mount, internal regulator, direct fastening, and the requirement to reuse the original pulley before purchase.

FAQ

What is the part number for this alternator?

The part number is 0125811051. For this listing, part number 0125811051 is the main reference point. Listed voltage is 12. Listed output rating is 180. 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 180A charge current and 180A power rating. For this listing, part number 0125811051 is the main reference point. Listed voltage is 12. Listed output rating is 180. These details should still be checked against the original unit before ordering.

Does it have an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number 0125811051 is the main reference point. Listed voltage is 12. Listed output rating is 180. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

It is listed as new. For this listing, part number 0125811051 is the main reference point. Listed voltage is 12. Listed output rating is 180. These details should still be checked against the original unit before ordering.

Does it come with the pulley?

It is noted that the unit will require the original pulley, so the pulley is to be reused rather than assumed to be included. For this listing, part number 0125811051 is the main reference point. Listed voltage is 12. Listed output rating is 180. These details should still be checked against the original unit before ordering.

What should be checked before buying?

Confirm the part number 0125811051, the 12V 180A rating, pad mount, direct fastening, internal regulator, and the original pulley requirement against the existing alternator and application details. For this listing, part number 0125811051 is the main reference point. Listed voltage is 12. Listed output rating is 180. These details should still be checked against the original unit before ordering.