# IBSG4W099 Valeo New 48V Starter Generator \u2013 Detailed Product Description<\/p>\n
Ez a r\u00e9szletes term\u00e9kle\u00edr\u00e1s az **IBSG4W099** cikksz\u00e1m\u00fa, \u00faj, 48V-os Valeo ind\u00edt\u00f3gener\u00e1torra (ISG – Integrated Starter Generator) vonatkozik, amelyet kifejezetten pr\u00e9mium j\u00e1rm\u0171vekhez fejlesztettek ki. Ez az alkatr\u00e9sz kulcsfontoss\u00e1g\u00fa a modern hibrid (Mild Hybrid Electric Vehicle – MHEV) rendszerek hat\u00e9kony m\u0171k\u00f6d\u00e9s\u00e9hez, biztos\u00edtva a kiv\u00e1l\u00f3 ind\u00edt\u00e1si teljes\u00edtm\u00e9nyt \u00e9s az energia-visszanyer\u00e9si (regenerat\u00edv f\u00e9kez\u00e9s) k\u00e9pess\u00e9get.<\/p>\n
## Overview and Compatibility<\/p>\n
The IBSG4W099 is a high-performance, 48V starter generator primarily recommended for premium models from Jaguar and Land Rover. This unit forms an integrated part of the vehicle's electrical system, supporting start-stop functions and momentary torque assistance.<\/p>\n
**Compatible Vehicles:**<\/p>\n
* **Jaguar F-Pace**
\n* **Land Rover:**
\n* Range Rover Defender
\n* Range Rover (Sport)<\/p>\n
## Technical Specifications and Cross-References<\/p>\n
The table below details the IBSG4W099 part number, along with all known cross-references provided by the manufacturer and for replacement parts. This comprehensive compatibility list ensures that workshops can quickly identify the correct replacement item.<\/p>\n
| Category | Part Number \/ Reference | Manufacturer \/ Brand |
\n| :— | :— | :— |
\n| **Factory Part Number (OEM)** | UD102353 | VALEO |
\n| **Factory Part Number (OEM)** | A4A46940 | JAGUAR |
\n| **Factory Part Number (OEM)** | A4A48237 | JAGUAR |
\n| **Factory Part Number (OEM)** | T4A41634 | JAGUAR |
\n| **Factory Part Number (OEM)** | T4A41634E | JAGUAR |
\n| **Factory Part Number (OEM)** | L8B2-11A240-BA | LAND ROVER |
\n| **Factory Part Number (OEM)** | L8B2-11A240-BB | LAND ROVER |
\n| **Factory Part Number (OEM)** | L8B2-11A240-BC | LAND ROVER |
\n| **Factory Part Number (OEM)** | L8B2-11A240-BD | LAND ROVER |
\n| **Factory Part Number (OEM)** | L8B2-11A240-BE | LAND ROVER |
\n| **Factory Part Number (OEM)** | LR144047 | LAND ROVER |
\n| **Factory Part Number (OEM)** | LR154948 | LAND ROVER |
\n| **Factory Part Number (OEM)** | LR157915 | LAND ROVER |
\n| **Factory Part Number (OEM)** | LR174078 | LAND ROVER |
\n| **Factory Part Number (OEM)** | 415008 | VALEO |
\n| **Factory Part Number (OEM)** | 615008 | VALEO |
\n| **Factory Part Number (OEM)** | 738581 | VALEO |
\n| **Own Part Number** | **IBSG4W099** | **VALEO** |
\n| **Alternative Part Number** | ALTJ587 | 3EFFE |
\n| **Alternative Part Number** | ALTJ587V | 3EFFE |
\n| **Alternative Part Number** | AEG9028 | AUTOELECTRO |
\n| **Alternative Part Number** | CAS15H08GS | CASCO |
\n| **Alternative Part Number** | 21015H08OVIT | AB AUTOMOTIVE |
\n| **Alternative Part Number** | 556399RIV | KUHNER |
\n| **Alternative Part Number** | 89216886 | POWERMAX |
\n| **Alternative Part Number** | 457.506.250.500 | PSH |
\n| **Alternative Part Number** | 2027980HOE | REAL |
\n| **Alternative Part Number** | 3015H08.1 | SANDO |
\n| **Alternative Part Number** | STS17H080 | SIOM |<\/p>\n
**Main Categories:**<\/p>\n
* **Category:** Generators (Alternators)
\n* **Brand:** Valeo<\/p>\n
## The Role of 48V Starter-Generators in Modern Vehicles<\/p>\n
The IBSG4W099 is an Integrated Starter Generator (ISG) which is the cornerstone of 48V mild-hybrid (MHEV) systems. These systems offer significant fuel economy benefits compared to traditional 12V systems, while not requiring large, high-voltage batteries like full hybrids (HEV) or plug-in hybrids (PHEV).<\/p>\n
### Main Functions and Advantages:<\/p>\n
1. **Excellent Starting Performance:** The ISG enables faster and quieter engine starting compared to traditional starter motors. The 48V system provides sufficient energy for immediate, smooth engine startup.
\n2. **Regenerative Braking (Energy Recovery):** During braking or deceleration, the ISG switches to generator mode and charges the 48V battery by converting kinetic energy into electrical current. This reduces wear on brake pads and increases energy efficiency.
\n3. **Torque Assist:** During acceleration, the ISG briefly operates as a motor, providing supplementary torque to the internal combustion engine. This is particularly advantageous at low speeds, improving driving dynamics and reducing the load on the main engine.
\n4. **Start-Stop Function Optimization:** The system allows the engine to shut down during deceleration (coasting) and restart instantly when the driver applies the throttle again, minimizing idling consumption.
\n5. **LIN Protocol Compatibility:** Communication of modern starter-generators with vehicle control units (ECUs) often occurs via the LIN (Local Interconnect Network) protocol. This Valeo unit ensures standardized communication with the vehicle's diagnostic and control systems.<\/p>\n
## Professional Notes on Installation and Maintenance<\/p>\n
The replacement of the IBSG4W099 requires specialized expertise, especially concerning the handling of 48V systems.<\/p>\n
* **High Voltage Safety:** Although 48V systems operate at a lower voltage than High Voltage (HV) systems, they still require specific precautions during servicing. Always ensure the system is de-energized before commencing work.
\n* **Diagnostics:** After a successful replacement, it is essential to perform a system check and clear fault codes using appropriate diagnostic tools (e.g., Autodiagger or other EV\/PHEV diagnostic equipment).
\n* **Training:** It is recommended to undergo dedicated training for the maintenance of starter-generators and related technologies (e.g., Start-Stop systems, LIN protocol).<\/p>\n
This new Valeo component guarantees factory quality and the long-term reliability of vehicle electrical systems.<\/p>","protected":false},"excerpt":{"rendered":"
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