Valeo Alternator 12V 140A Part No. 439862 OEM 03L 903 024 S

This Valeo alternator is a 12V unit rated at 140A, supplied as part number 439862 and identified with OEM number 03L 903 024 S. It is a rotating electrical component from Valeo, with an internal regulator, 6 groove pulley, and clockwise rotation.

The unit uses a quad leg alternator mount with four-point mounting and a 49mm pulley outside diameter. It is listed with no connector for revolution counter, so the electrical and mounting details should be checked carefully against the vehicle and the removed unit before purchase.

Weight is recorded at 7.58kg, and the alternator is sold as each. As with any charging-system part, matching the voltage, amperage, pulley layout, and connector arrangement is just as important as matching the part number.

Key Features

• Valeo alternator, 12V 140A
• Part No. 439862
• OEM number 03L 903 024 S
• 6 groove pulley
• Clockwise rotation
• Internal regulator

Specifications

• Voltage: 12V
• Current output: 140A
• Pulley outside diameter: 49mm
• Rotation: CW
• Regulator type: Internal
• Alternator mount: Quad leg
• Fastening type: Four-point mounting
• Weight: 7.58kg

Fitment Guidance

• Volkswagen Amarok
• Volkswagen Amarok 2011
• Volkswagen Amarok 2012
• Volkswagen Amarok 2013
• Volkswagen Amarok 2014
• Volkswagen Amarok 2015
• Volkswagen Amarok 2016
• Volkswagen Amarok 2017

Application and Buying Notes

Before ordering, confirm the alternator on the vehicle matches the key identifiers on this unit: 12V, 140A, 6 groove pulley, clockwise rotation, internal regulator, and quad leg four-point mounting. These points affect both physical fitment and electrical compatibility, and a mismatch can stop the part from installing correctly or charging as intended.

The OEM number 03L 903 024 S and part number 439862 are the most reliable cross-checks when comparing against the original alternator or a parts catalogue. If the old unit has a different pulley section, mounting style, or connector arrangement, do not assume interchangeability just because the vehicle is a Volkswagen Amarok.

The alternator is listed with no connector for revolution counter, which is a useful checkpoint on vehicles where the original unit may have additional wiring or sensing provisions. Measure and compare the pulley outside diameter at 49mm, and verify the mount shape and fastening type before fitting.

No warranty is listed for this part, so it is worth confirming the replacement need carefully before purchase. As a charging-system component, the condition of belts, wiring, battery health, and mounting hardware should also be checked when diagnosing alternator faults.

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 439862 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 No Warranty, Power Rating (Amp) 140, Pulley Section 6 Groove, Rotation CW, Voltage 12, OEM Number 03L 903 024 S, Position / Degree R 90, Connector / Clamp No Connector for Revolution Counter.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. 439862, Brand VALEO, Description Valeo Alternator 12V 140A, Pin Code IR139, Pulley Outside Diameter 49mm, Regulator Type Internal, Suits Unit Make Valeo, Alternator Mount Quad Leg.

Valeo Alternator 12V 140A. Part number 439862 should be checked first. Listed voltage is 12. Listed output rating is 140. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Quad Leg. 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 439862, 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 140 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching part number 439862 and OEM number 03L 903 024 S to the vehicle application, along with the 12V 140A rating, 6 groove pulley, clockwise rotation, internal regulator, and quad leg four-point mounting.

FAQ

What is the voltage and output of this alternator?

It is a 12V alternator with a 140A current rating. For this listing, part number 439862 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include VOLKSWAGEN AMAROK, VOLKSWAGEN AMAROK 2011, VOLKSWAGEN AMAROK 2012. These details should still be checked against the original unit before ordering.

What part numbers are listed for this unit?

The listed part number is 439862 and the OEM number is 03L 903 024 S. For this listing, part number 439862 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include VOLKSWAGEN AMAROK, VOLKSWAGEN AMAROK 2011, VOLKSWAGEN AMAROK 2012. These details should still be checked against the original unit before ordering.

What pulley setup does it use?

It has a 6 groove pulley with a 49mm pulley outside diameter. For this listing, part number 439862 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include VOLKSWAGEN AMAROK, VOLKSWAGEN AMAROK 2011, VOLKSWAGEN AMAROK 2012. These details should still be checked against the original unit before ordering.

Does this alternator have an internal or external regulator?

It is listed with an internal regulator. For this listing, part number 439862 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include VOLKSWAGEN AMAROK, VOLKSWAGEN AMAROK 2011, VOLKSWAGEN AMAROK 2012. These details should still be checked against the original unit before ordering.

What mounting style is specified?

It is listed with a quad leg alternator mount and four-point mounting. For this listing, part number 439862 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include VOLKSWAGEN AMAROK, VOLKSWAGEN AMAROK 2011, VOLKSWAGEN AMAROK 2012. These details should still be checked against the original unit before ordering.

Which vehicles are shown in the fitment data?

The fitment data lists Volkswagen Amarok applications, including model years from 2011 through 2021. For this listing, part number 439862 is the main reference point. Listed voltage is 12. Listed output rating is 140. Published fitment references include VOLKSWAGEN AMAROK, VOLKSWAGEN AMAROK 2011, VOLKSWAGEN AMAROK 2012. These details should still be checked against the original unit before ordering.