ARacer AF3 Professional Wideband O2 AFR Module is the new and improved wideband AFR module that now comes included with a Bosch LSU 4.9 or 4.2 wideband oxygen sensor! The AF3 is a better upgrade over the older AF2 model! The AF3 is the latest and greatest AFR module from ARacer.
 
 
Compatible with BOSCH LSU 4.9 and LSU 4.2 sensors
High exhaust temperature warning (>800°C)
Advanced O2 heater control & over-temperature protection
Enhanced digital transmission speed by 10%
Supports ECU & BOSCH O2 sensor fault code detection
Compatible with ethanol-blended fuels: E30, E50, E85
Only supports Super X & Mini X ECU, software version must be S120 or above
 
NOTE: A 18mm o2 sensor bung is required on the exhaust header. If your exhaust header pipe does not have an available o2 bung, then you would need to add one.