Critical Tuning Element
The **Bosch LSU 4.9** is the industry-leading sensor element for accurate Air/Fuel Ratio (AFR) monitoring. Designed for high-performance engines, this sensor provides the lightning-fast response times needed to protect your engine during high-load tuning.
Verified Controller Compatibility
This sensor element is a direct replacement for the following systems:
🔹 AEM # 30-2004
🔹 PLX Devices Type B
🔹 FAST # 170408
🔹 Motec # 57005
🔹 Autometer # 2243
🔹 Dynojet # 48292001
Specifications & Cross Reference
| Manufacturer Part Number | 0258017025 |
| Sensor Type | Wideband (O2, UEGO, LSU 4.9) |
| Interchange Part Numbers | 258017025, 17025, 12575657 |
| Fitment Type | Direct Replacement |
| Warranty | 2 Year Manufacturer Warranty |
| OEM Interchange | AC Delco 213-1572, GM 12575657 |
💡 Installation Pro-Tip: To prevent premature sensor failure, never leave the sensor in the exhaust pipe without the controller powered on. Ensure the part number 0258017025 matches your current system before purchase.