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COBB NexGen Flex Fuel Ethanol Sensor Kit 2008-2021 STI

SKU 325650
Original price $725.00 - Original price $725.00
Original price
$725.00 - $725.00
Current price $725.00
This plug and play NexGen Ethanol Sensor Kit is the heart of our NexGen Flex Fuel product offering. It consists of an ethanol content sensor with mounting bracket, fuel lines to be used with the COBB Fuel Lines, a NexGen Flex Fuel module, and a plug-and-play wiring harness to bring it all together.

The OE quality ethanol content sensor is secured to a bespoke powder coated aluminum bracket. Fuel is then fed to and from the sensor with pre-made fuel line with OE quick disconnect. A billet adapter is included to allow for seamless integration with the COBB Fuel Rail Line Kit.

The NexGen Flex Fuel Module is mounted to the passenger side strut tower and handles all of the data processing before sending ethanol content to the ECU to be used by an Accessport-delivered NexGen Flex Fuel calibration.

Tying everything together is a custom, easy to install, plug-and-play wiring harness. Utilizing OE quality wiring and connectors makes adding NexGen Flex Fuel on your supported Subaru both quick and reliable.

The COBB NexGen Ethanol Sensor Kit measures the ethanol content level of the fuel being pumped into your engine and then sends that data to the ECU to be used in a Flex Fuel calibration.

  • Subaru NexGen Flex Fuel Ethanol Sensor Kit STI 2008-2021
  • NexGen Flex Fuel Module
  • Plug and Play Wiring Harness
  • Ethanol Content Sensor with Bracket

Customer Reviews

Based on 2 reviews
NexGen for my 2021 STI

If your ready for that fuel system upgrade, this this NexGen Flex Fuel kit will work out perfectly. I recommend.


Thank you for your 5 Star Review! We are pleased to hear that the COBB NexGen Flex Fuel Ethanol Sensor Kit worked out perfectly for your fuel system upgrade on your 2021 STI. It is great to know that you found the kit suitable for your needs! Enjoy!


Reviewer avatar
Michael Niehoff
Good kit

Comes with everything you need to get flex fuel. It’s spendy but that’s the Cobb tax. Great thing to have if you live in a area where e85 is sold


Thank you for sharing your 5 Star Review and feedback on the COBB NexGen Flex Fuel Ethanol Sensor Kit for the 2008-2021 STI. We appreciate your positive comments about the kit, noting that it includes everything needed to enable flex fuel. We understand the investment involved, and we appreciate your understanding of the associated costs. It is great to hear that the kit is a valuable addition, especially for those in areas where E85 is available. Subimods aims to provide quality products, and we are glad to have met your expectations. Thank you for choosing Subimods, and we look forward to serving you in the future!


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