Valeo Alternator 12V 90A 439258

This Valeo alternator is a 12V, 90A unit supplied new, with part number 439258. It is listed with an internal regulator, 6 groove pulley, twin leg alternator mount and a double pivot lever fastening type, so the physical mounting details matter just as much as the electrical rating when checking suitability.

The unit is described as a Valeo alternator with a connector/clamp featuring revcounter coupling, 10mm pivot hole diameter, 10mm adjusting hole diameter and 146mm mount centre to centre. Those measurements are important if you are comparing against an existing alternator, especially where the bracket layout and pulley alignment need to match closely.

A one year warranty is stated for this alternator, and the weight is listed at 6.05kg. It is identified as a rotating electrical component and is intended to suit Volkswagen Transporter T4 applications with the AAC engine, so the vehicle application and engine code should be checked carefully before purchase.

Key Features

• Valeo alternator, 12V output
• 90A charge current
• New unit
• Internal regulator
• 6 groove pulley
• Twin leg mount

Specifications

• Part No.: 439258
• Brand: Valeo
• Voltage: 12V
• Alternator charge current: 90A
• Power rating: 90A
• Regulator type: Internal
• Pulley outside diameter: 50mm
• Pulley section: 6 groove

Fitment guidance

• Volkswagen Transporter T4 with AAC engine
• Volkswagen Transporter fitment is listed across model years from 1993 to 2003
• Confirm the existing alternator mounting style, pulley type and connector before ordering

Application and Buying Notes

The main fitment checkpoint here is the application for Volkswagen Transporter T4 with AAC engine, together with the part number 439258. For alternators, the correct vehicle can still have different mounting or connector arrangements, so it is wise to compare the mount centre to centre measurement of 146mm, the 60mm inside mounting legs and the twin leg mounting style against the unit being replaced.

The electrical side is straightforward: this is a 12V alternator with a 90A charge current and an internal regulator. That makes it suitable for a direct like-for-like comparison where the original unit also uses a 12V internal-regulated arrangement. If the vehicle has been modified, or if the old unit has unreadable markings, the physical dimensions and connector details become even more important.

The pulley specification is also worth checking before you buy. This alternator has a 50mm pulley outside diameter and a 6 groove pulley section. Belt groove count and pulley size need to line up with the existing drive setup, otherwise the part may not install correctly even if the vehicle model is close.

If you are replacing an old alternator, note the connector/clamp is listed as with revcounter coupling, and the fastening type is double pivot lever. Those details are commonly used to separate similar-looking alternators, so matching the old unit against these points will help avoid delays and returns. The listed weight of 6.05kg is also a useful reference when handling or comparing units over the counter.

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 439258 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, Inside Mounting Legs 60mm, Pivot Hole Diameter 10, Pulley Outside Diameter 50mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 146mm, Alternator Charge Current [A] 90.

Additional published details for cross-checking include Fastening Type Double Pivot Lever, Weight 6.05kg, Product Group 1 ROTATING ELECTRICAL, Part No. 439258, Brand VALEO, Description Valeo Alternator 12V 90A, Adjusting Hole Diameter 10, Pin Code IR139, Power Rating (Amp) 90, Pulley Section 6 Groove.

Valeo Alternator 12V 90A. Part number 439258 should be checked first. Listed voltage is 12. Listed output rating is 90. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin 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 439258, 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 90 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include VOLKSWAGEN TRANSPORTER, VOLKSWAGEN TRANSPORTER 1993, VOLKSWAGEN TRANSPORTER 1994, VOLKSWAGEN TRANSPORTER 1995. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm fitment using part number 439258, the Volkswagen Transporter T4 AAC engine application, and the listed mounting and pulley measurements before ordering. If your existing alternator differs in connector, bracket style, or pulley section, do not assume interchangeability.

FAQ

What vehicle is this alternator listed to suit?

It is listed to suit Volkswagen Transporter T4 with AAC engine.

Is this a new or remanufactured alternator?

This unit is listed as new.

What is the electrical output?

The alternator is rated at 12V and 90A, with a 90A charge current and 90A power rating listed.

Does it have an internal regulator?

Yes, the regulator type is listed as internal.

What pulley details are provided?

The pulley outside diameter is listed as 50mm and the pulley section is 6 groove.

What part number should I check against my old unit?

The part number listed is 439258. Matching the part number with the mount and connector details is the safest way to confirm suitability.