QFS Air Fuel Ratio O2 Sensor LSU 4.9 5-Wire Oxygen Sensor - HFP-WBS49
$49.99Price
Excluding Sales Tax
- Wideband oxygen sensor based on Bosch’s LSU 4.9 platform (5-wire pump cell design) with M18×1.5 thread, compatible with major aftermarket wideband controllers such as AEM, PLX, Dynojet, FAST, and Motec
- Eliminates free-air calibration thanks to its reference-pump design, offering faster warm-up, improved accuracy across rich-to-lean ranges, and enhanced reliability compared to older LSU 4.2 sensors
- Functions as a cost-effective, drop-in replacement for Bosch part numbers 0258017025 and 0258017126 Fuel Performance SA
- Requires an external wideband controller (e.g., Innovate, AEM, Dynojet) to operate properly; not a stand-alone device
