# IBSG4U054 VW iBSG Generator<\/p>\n
This detailed product description refers to the 48V Integrated Starter-Generator (iBSG) unit of type **IBSG4U054**, designed for Volkswagen vehicles. This component is crucial in modern mild-hybrid (MHEV) systems, ensuring efficient energy recuperation, starting, and charging.<\/p>\n
Stremtec, as an expert in starting, charging, and cooling systems, offers high-quality, direct replacement parts that meet or exceed Original Equipment (OE) specifications.<\/p>\n
## Product Overview and Application<\/p>\n
The IBSG4U054 is an advanced generator that performs a dual function in Volkswagen's 48V mild-hybrid systems: it operates as a starter motor and as a generator. This technology enables more efficient fuel consumption, smoother Start\/Stop functionality, and the recovery of energy from regenerative braking.<\/p>\n
This component is a direct replacement for factory Valeo units and can be used in numerous Volkswagen models where the 48V iBSG system has been implemented.<\/p>\n
## Main Features and Advantages<\/p>\n
* **Integrated System:** The integration of starter motor and generator functions into one unit reduces engine compartment space and improves system efficiency.
\n* **48V MHEV Compatibility:** Specifically optimized for 48-volt mild-hybrid architectures.
\n* **High Efficiency:** Delivers excellent charging performance for the 48V battery and ensures fast and reliable starting.
\n* **Regenerative Capability:** Enables maximum energy recovery during braking, thereby increasing the overall energy efficiency of the vehicle.
\n* **OE Quality:** The product complies with the strict quality requirements of original parts.<\/p>\n
## Technical Specifications<\/p>\n
For precise identification of the IBSG4U054 generator and verification of compatibility, the following technical data and factory part numbers (OE and aftermarket) are required:<\/p>\n
| Type \/ Manufacturer | Part Number |
\n| :— | :— |
\n| **Factory Part Number (VW)** | 05C903018 |
\n| **Factory Part Number (VW)** | 05C903018X |
\n| **Factory Part Number (VW)** | 05E903018FX |
\n| **Factory Part Number (VW)** | 05E903018G |
\n| **Factory Part Number (VW)** | 05E903018GX |
\n| **Factory Part Number (VW)** | 5C903018 |
\n| **Factory Part Number (VW)** | 5E903018G |
\n| **Valeo OE** | UD102357 |
\n| **Valeo** | 415012 |
\n| **Valeo** | 615012 |
\n| **Valeo** | 740009 |
\n| **Valeo (Own Designation)** | IBSG4U054 |
\n| **AS-PL** | 2726578 |
\n| **CASCO** | CAS15H12GS |
\n| **CASCO** | CAS15H14GS |
\n| **DRI** | 24-0019 |
\n| **ELSTOCK** | 5111122508 |
\n| **AB AUTOMOTIVE** | 21015H12OVIT |
\n| **AB AUTOMOTIVE** | 21015H14OVIT |
\n| **KRAUF** | ALV3954 |
\n| **KUHNER** | 556403RIV |
\n| **KUHNER** | 556405RIV |
\n| **LUCAS** | LRC00019 |
\n| **LUCAS** | LRC0019 |
\n| **PSH** | 307.503.250.500 |
\n| **REAL** | 2027921HOE |
\n| **REAL** | 2027941HOE |
\n| **SANDO** | 3015H12.1 |
\n| **SANDO** | 3015H14.1 |
\n| **TMI** | AL04608 |<\/p>\n
**Cross References:**<\/p>\n
* VW ALTJ579
\n* 3EFFE<\/p>\n
## Categories and Brands<\/p>\n
* **Main Category:** Generators (Alternators)
\n* **Component Group:** Starters \/ Alternators
\n* **Manufacturer:** Valeo (Original Supplier)
\n* **Sub-category:** Alternator<\/p>\n
## Professional Notes<\/p>\n
The maintenance and replacement of iBSG (Integrated Belt Starter Generator) systems requires specialized knowledge, especially due to the 48V network voltage. Communication via LIN (Local Interconnect Network) protocol ensures synchronization with the Engine Control Unit (ECU), which is essential for the correct functioning of the Start\/Stop and regenerative functions.<\/p>\n
This component is the ideal choice for professional workshops dealing with the repair of Volkswagen mild-hybrid vehicles, looking for a reliable replacement part that meets factory specifications. The extensive cross-reference list guarantees that the correct part can be easily identified based on existing OE part numbers.<\/p>\n
**Related Products:**<\/p>\n
The Stremtec offer also includes the **IBSG4W059 Valeo New 48V** alternator, which is another 48V unit intended for a similar application area, which might be worth considering to expand the compatibility range.<\/p>\n
This product is part of Stremtec's broader portfolio, which includes EV\/PHEV chargers, diagnostic tools, and other specialized workshop equipment.<\/p>","protected":false},"excerpt":{"rendered":"
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