Upgrade your fuel system with the TMS ReFlex+™ Flex Fuel & Harness Kit — a complete plug-and-play solution built for advanced tuning, sensor integration, and full Flex Fuel compatibility. Designed for seamless installation on BMW™ and Supra B58 and G8X™ S58 platforms, this kit includes everything needed for a clean, reversible, and sensor-rich setup.

Includes

TMS ReFlex™ Plug-and-Play Harness
Connects to port injection, ethanol sensor, low pressure fuel sensor, charge pipe, intake CAM, and crank sensor — all without cutting or splicing.

CAN + Power Splitter (Gen1 fitment Dependent)
Routes power and CANBus to the ReFlex™ harness via the Body Domain Controller in the passenger footwell, behind the kick-plate. (for Gen1 Cars)

Plug and Play PTCAN2 Connector near DME (Gen2 / S58 Chassis Dependent)

• Connects directly to the transmission plug near the DME
• Full access to all ReFlex+ I/O
• Sealed, heat-rated, and abrasion-resistant components
• Completely bench-tested and fused (10A)

Auxiliary Cable Pack
Includes an 8-foot cable that plug directly into ReFlex™ auxiliary ports (Aux Out 1/2/3, Aux In 4). Ideal for future upgrades such as:

• Methanol injection
• Nitrous
• Additional sensors
• Low Pressure Fuel Pumps

TMS Flex Fuel Kit (with Filter and Ethanol Sensor)
Plug-and-play flex fuel kit replaces the OEM fuel line with a TMS-designed Fuel Line Assembly and Filter. Integrates seamlessly using a content analyzer and ethanol sensor — no wire splicing or tapping required. Fully reversible to stock. Also includes a capped off T to split off to a port injection rail.

Motiv ReFlex Plus™ Controller
Ships blank — no preloaded software.

ReFlex Plus™ Mounting Bracket (chassis dependent may very)
Installs in the access compartment next to the engine bay on the passenger side to secure the ReFlex™ controller.

Motiv™ 0–10 Bar Pressure Sensor
Provides high-resolution fuel pressure data.

Fuel Pressure Sensor Fitting
Adapter fitting for clean, leak-free integration with the TMS harness. Built into the TMS Fuel Lines

Compatible Car Models

B58 GEN 1 Models:

• 2015–2019 BMW™ 340i (F30 / F31 / F34)
• 2016–2019 BMW™ 440i (F32 / F33 / F36)
• 2016–2021 BMW™ M240i (F22 / F23)

B58 GEN 2 Models:

• 2018–Present BMW™ 340i (G20) (automatic only)
• 2021–Present BMW™ 240i (G22) (automatic only)
• 2022–Present BMW™ 440i (G42) (automatic only)
• 2018–Present BMW™ X3M40i (G01) (automatic only)

• 2020-present Toyota Supra™ A9X (automatic only)
  

G8X Models:

• 2021–Present BMW™ M3 (G80) (automatic only)
• 2021–Present BMW™ M4 Coupe (G82) (automatic only)
• 2021–Present BMW™ M4 Convertible (G83) (automatic only)
• 2023 BMW™ M2 (G87) (automatic only)

Click HERE for installation instructions.