MHD Flex Fuel Kit (F/G Series/Supra)

Run E85 with confidence. The MHD FlexFuel Kit adds real-time ethanol content monitoring to your MHD-tuned BMW, letting your tune automatically adjust timing, fueling, and boost based on the actual blend in your tank — not a guess.

At the core of the kit is the CAN Ethanol Content Analyzer (ECA), which reads real-time ethanol percentage directly from a Continental E85 sensor, converts it to CAN bus data, and sends accurate ethanol content and fuel temperature to the DME. That means your car can safely run any blend from E0 to E100+ on the fly, without needing a separate tune for every fuel mix. Kies MotorsportsKies Motorsports

Installation is genuinely plug-and-play. There's no need to splice or solder wires — everything, including connectors and fuel hoses, is designed to click straight into place, and the hoses are rated to 10 bar (145 psi) of static pressure for long-term reliability. BimmerNetworkBimmerNetwork

Compatibility: F22, F25, F3x, F1x, F4x, and F8X chassis with N55 and S55 engines, F-series Gen1 B58B30M0 with automatic transmission, G30 (5 Series) and G01 (X3) Gen1 B58 with automatic transmission, and G20, Supra MKV, G01, and G30 Gen2 B58 with automatic transmission, plus X3M, X4M, M3 (G80), and M4 (G82) S58 engines with automatic transmission. MHD TuningMHD Tuning

Important: This kit enables the FlexFuel feature — you'll still need a correctly configured MHD tune for the E85 blend you're running, as mismatched tuning can damage the engine.