Motiv Motorsport ReFlex Main Injector Harness - Inline-6

The Motiv Motorsport ReFlex Main Injector Harness for Inline-6 engines is a purpose-built wiring solution designed to integrate seamlessly with the ReFlex+ and ReFlex PRO controllers. Engineered for precision, reliability, and clean installation, this harness forms the core of a complete ReFlex wiring setup and supports advanced port injection, sensor inputs, and auxiliary outputs in high-performance BMW applications.

The ReFlex+ complete harness system is split into two sections: the Main Injector Harness and a vehicle-specific Installation Harness. This listing covers the Main Injector Harness, which centralises injector control, sensor connectivity, and auxiliary outputs while providing a robust interface to the ReFlex control unit via an 8-pin DTM connector. The result is a tidy, serviceable wiring solution that supports complex fuel and sensor strategies without unnecessary splicing or compromise.

Designed specifically for Inline-6 engines, this harness uses EV6 / USCAR injector connectors and high-quality DTM connections throughout, ensuring reliable signal integrity in demanding environments.

What This Harness Does

The ReFlex Main Injector Harness enables:

• Port injection control on Inline-6 engines

• Integration of ethanol content sensing

• Connection of multiple pressure and analogue sensors

• Auxiliary outputs for external devices and control strategies

• Clean, modular connection to ReFlex+ or ReFlex PRO install harnesses

It is ideal for advanced fuel system setups where accuracy, expandability, and reliability are critical.

Key Features

• Port injection harness for Inline-6 engines

• EV6 / USCAR injector connectors

• DTM 3-Pin connector for ethanol content sensor (via ReFlex+ Plug-and-Play Ethanol Sensor Harness)

• 2 × DTM 2-Pin connectors for external sensors, including:

  • Fuel pressure

  • Coolant pressure

  • Exhaust back pressure

  • Oil pressure

• DTM 3-Pin connector for a 0–5V analogue sensor

• DTM 2-Pin connector for auxiliary output (switched +12V supply and low-side trigger from ReFlex control unit)

• 3 × unterminated auxiliary output wires functioning as low-side triggers

• DTM 8-Pin connector for easy connection to ReFlex+ installation harnesses

• Compatible with ReFlex+ and ReFlex PRO systems

Engine Compatibility

Designed for perfect integration with BMW Inline-6 engines, including:

• BMW N54

• BMW N55

• BMW S55

• BMW B58

• BMW S58

Why Choose Motiv Motorsport?

Motiv Motorsport develops advanced fuel system solutions for high-performance and competition vehicles, with a focus on precision engineering and real-world reliability. The ReFlex platform is trusted globally for complex port injection and ethanol-based setups, and this Main Injector Harness reflects that same attention to detail—delivering a clean, expandable wiring solution that supports serious power goals.

Important Legal Notice

All Motiv Motorsport parts and services are intended for use in competition racing vehicles only.
They are not legal for use on public roads or for any non-competition motor vehicle application.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

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All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.