Bootmod3 FlexFuel Kit High-Flow – BMW G-Series (S58)

OVERVIEW

The bootmod3 FlexFuel Kit – High Flow puts the required flex fuel hardware on your S58-powered G-series BMW M car with minimal effort, in your own driveway. The kit is entirely plug and play with the factory vehicle harness — no cutting or splicing of OEM wiring or connectors — and it can be removed again without a trace on the car.

Bootmod3 designed the Flow Optimized Flex Fuel Sensor Adapter (FFSA) so that fuel flow stays unobstructed with no added pressure drop at full fuel pump flow, which matters when the factory fuel system is being pushed with the power ethanol can provide over gasoline. The sensor housing installs into the factory fuel hat location and carries two 1/8 NPT ports so an auxiliary fuel pressure sensor can be added if needed.

Install the kit, flash a flex-fuel-enabled bootmod3 OTS MultiMap or custom map, and you no longer have to think about the alcohol/gasoline blend percentage in the tank.

SPECS

• Mounting: factory fuel hat area, below the rear seat
• Installation: minutes at home, rather than hours on a lift fabricating fuel lines and pinning into OEM electrical
• Fully reversible and removable back to stock without a trace
• Flex fuel sensor adapter: custom 3-piece aluminum 6061 with built-in sensor bypass for obstruction-free fuel flow
• Sealing: all connecting points sealed with fuel-safe Viton o-rings
• Auxiliary ports: two 1/8 NPT ports for an optional fuel pressure sensor, supporting bootmod3 CustomROM v2
• Ethanol Content Analyzer: CANBUS enabled, integrates with bootmod3 CustomROM
• ECA enclosure: custom aluminum 6061
• Electrical: Power/CANBus 4-wire harness, plug and play with the factory vehicle harness
• Fuel line: custom kink-free teflon braided line, plug and play with the OEM fuel hat and factory fuel feed line — no cutting and no new lines required
• Fitting: -6 AN fitting by Racetronix
• Enables bootmod3 flex fuel OTS MultiMaps and custom tunes from your bootmod3 tuner of choice

PARTS INCLUDED

• Custom 3-piece aluminum 6061 flex fuel sensor adapter with built-in sensor bypass
• Viton o-rings at all connecting points
• CANBUS-enabled Ethanol Content Analyzer (ECA) board
• Custom aluminum 6061 CANBus enclosure for the ECA board
• Power/CANBus 4-wire plug-and-play harness
• Continental flex fuel sensor with 3-wire harness
• Custom kink-free teflon braided fuel line
• -6 AN fitting by Racetronix

TECH RESOURCES

Additional Parts Required

• Bootmod3 S58 Tune – BMW M2 / M3 / M4 / X3M / X4M — required. The ECA reports ethanol content to bootmod3 CustomROM; without an active bootmod3 license on the vehicle the kit has nothing to talk to.
• Speed Logic ECU Unlock Service – S58 — G80 / G82 / G87 vehicles need a Femto DME unlock before bootmod3 can be flashed.
• A flex-fuel-enabled bootmod3 OTS MultiMap or a custom map from a bootmod3 tuner — required to actually use the ethanol reading.
• E85 or an ethanol/gasoline blend — the kit measures blend content; it does not add fuel system capacity.
• Optional: an auxiliary fuel pressure sensor for the 1/8 NPT ports (not included).
• Rear seat removal and basic hand tools for access to the factory fuel hat, supplied by the installer.

Installation

• bootmod3 Flex Fuel Kit Installation Instructions — official bootmod3 wiki (includes G-Series install videos)
• bootmod3 v3.0 User Manual — flex fuel and hardware setup within the app

Notes

• This kit is designed for the OEM fuel pump and fuel lines; changes to fuel lines or pumps may not be compatible. Confirm fitment with Speed Logic if your vehicle is not listed below.

VEHICLE APPLICATIONS