IBR Flex Fuel Sensor Kit for Subaru WRX, STI & More | IBR-FLX01-GRFA
Video description
Designed for a wide range of Subaru turbo models, this complete kit allows you to monitor and data log ethanol content while providing accurate sensor readings through IBR's proprietary controller.
Unlike many kits that rely on the rear O2 sensor for power, the IBR controller generates its own onboard 12V power supply, simplifying installation and improving long-term reliability. The system also references the ECU's 5V supply for more accurate ethanol content readings, making it an excellent solution for flex fuel builds.
Important: This kit is compatible with all fuel management systems only when the vehicle is properly tuned for flex fuel. It is NOT compatible with the COBB Green Speed update.
Fitment:
3-Pin Version:
- Subaru WRX (2002-2005)
- Subaru STI (2004-2006)
- Subaru Forester XT (2004-2008)
- Subaru Legacy GT (2005-2006)
- Subaru Outback XT (2005-2006)
5-Pin Version:
- Subaru STI (2007-2021)
- Subaru WRX (2008-2021)
- Subaru Legacy GT (2007-2012)
- Subaru Outback XT (2007-2009)
- Subaru Forester XT (2009-2013)
Features:
- Monitors and data logs ethanol content
- Compatible with properly tuned flex fuel setups
- Proprietary controller with onboard 12V power supply
- No need to source power from the rear O2 sensor
- ECU-referenced 5V analog output for improved accuracy
- Automotive-grade wiring
- Replaceable wiring harness
- Durable potted controller housing with sealed connector
- Top-side installation—no need to work underneath the vehicle
- Fuel lines included for both 2008-2021 WRX and STI applications
What's Included:
- Continental Flex Fuel Sensor
- Flex Fuel Sensor Bracket
- Flex Fuel Sensor Controller
- Plug-and-play Wiring Harness
- Fuel Lines for applicable WRX and STI models
Important Installation Note:
Subaru vehicles only have two TGV inputs available. You can use a maximum of two of the following IBR systems at the same time:
- Secondary Injection Controller (SIC)
- Flex Fuel Sensor Kit
- Fuel Pressure Sensor Kit
Running all three simultaneously requires a custom wiring solution.







