Bosch Alternator 12V 55A 0120488185

Bosch alternator, 12V and 55A, part number 0120488185, supplied new and made in Germany. It is listed as an alternator type excluding vacuum pump, with an internal regulator and a single leg mount, so the mounting style and electrical setup are both defined clearly before purchase.

This unit is specified with a 17mm shaft diameter, 56mm mount leg thickness, 144mm mount centre-to-centre measurement, 8mm adjusting hole diameter and 8mm pivot hole diameter. It is supplied without belt pulley, so the existing pulley arrangement and belt setup need to be checked against the vehicle before fitting.

The alternator charge current is 55A at 12V, and the recommended additional repair is V-Belt/V-Ribbed Belt. That makes it important to confirm the belt condition at the same time as the alternator, especially where the original belt has wear, glazing or cracking.

Built by Bosch for rotating electrical applications, this alternator is described as corrosion resistant and made from high quality raw materials. It is sold each and carries a one year warranty, giving a clear reference point for workshop ordering and replacement planning.

Key Features

• 12V alternator with 55A charge current
• Bosch part number 0120488185
• New unit with internal regulator
• Single leg mount with single pivoted lever fastening
• Supplied without belt pulley
• Made in Germany

Specifications

• Type: Alternator
• Brand: Bosch
• Part No.: 0120488185
• Voltage: 12V
• Power rating: 55A
• Alternator charge current: 55A
• Regulator type: Internal
• Alternator mount: Single leg

Confirmed application references

• AGCO Allis 9670
• AGCO Allis 9690
• Bomag BC601RB
• Deutz F3L913
• Deutz-Fahr Agroprima
• Deutz-Fahr Agrostar
• Fendt Farmer
• JLG 600AJ

Application and Buying Notes

Before ordering, match the part number 0120488185, the 12V system voltage and the 55A charge rating to the original unit on the machine. The mounting measurements matter as much as the electrical rating here: the single leg mount, 56mm mount leg thickness and 144mm centre-to-centre spacing must suit the existing installation.

Because this alternator is supplied without a belt pulley, confirm whether the vehicle uses a matching pulley arrangement already or whether the original pulley needs to be transferred. The listing also notes recommended additional repairs of V-Belt/V-Ribbed Belt, which is worth checking at the same time if the belt is due for replacement.

The internal regulator is part of the unit specification, so the charging system arrangement should be compared carefully with the original alternator before purchase. The 17mm shaft diameter, 8mm adjusting hole and 8mm pivot hole are practical identification points when checking the physical fit against the old part.

This alternator is described as an alternator type excluding vacuum pump, so it is important not to assume interchange with units that use a different rear housing or pump arrangement. For workshop confidence, compare the Bosch number, mounting style and pulley setup against the removed part rather than relying on appearance alone.

If the vehicle is one of the listed applications, the exact year and model should still be checked against the machine and the old alternator. Matching the application reference, part number and mounting measurements gives the best chance of avoiding downtime and repeat labour.

For buyers replacing an older Bosch alternator, the one year warranty and new condition offer a straightforward replacement option. The most important checks remain the 12V electrical system, 55A output, single leg mount, and whether the machine requires a unit supplied without a belt pulley.

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 0120488185 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, Mount Leg Thickness 56mm, Power Rating (Amp) 55, Shaft Diameter 17mm, Voltage 12, Mount Cnt to Cnt 144mm, Alternator Charge Current [A] 55, Pulleys without belt pulley.

Additional published details for cross-checking include Recommended additional repairs V-Belt/V-Ribbed Belt, Packaging width 18.5, Manufactured in Germany, Product Group 1 ROTATING ELECTRICAL, Part No. 0120488185, Brand BOSCH, Description Bosch Alternator 12V 55A, Adjusting Hole Diameter 8, Pivot Hole Diameter 8, Regulator Type Internal.

Bosch Alternator 12V 55A. Part number 0120488185 should be checked first. Listed voltage is 12. Listed output rating is 55. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Single Leg. 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 0120488185, 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 55 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by matching Bosch part number 0120488185, 12V/55A specification, single leg mounting details, shaft and hole dimensions, and the vehicle application before ordering.

FAQ

What is the part number for this Bosch alternator?

The part number is 0120488185.

What voltage and output does this alternator have?

It is a 12V alternator with a 55A power rating and 55A alternator charge current.

Does this alternator come with a belt pulley?

No. It is listed as without belt pulley.

What type of regulator does it use?

It has an internal regulator.

Is this a new or remanufactured unit?

It is listed as new.

What should I check before buying?

Confirm the part number 0120488185, the 12V/55A specification, the single leg mount, and the listed mounting and shaft measurements, and compare them with the original unit and vehicle application.