Nexus S2/S3 Plug ‘n’ Play Adapter Harness Mazda RX7 FD S6

The Foundation of Modern Rotary Management

For the Mazda RX-7 FD (Series 6) owner, the transition to a modern Vehicle Control Unit (VCU) is the definitive step in unlocking the reliability and performance of the 13B-REW. The Nexus S2/S3 Plug ‘n’ Play Adapter Harness is the critical interface engineered to bridge the gap between your vehicle’s factory wiring and the advanced Haltech Nexus series VCUs. This is not a universal pigtail; it is a vehicle-specific adapter designed to mate directly with the OEM 2-row ECU header plug found in 1992-1995 FD3S models.

Engineering for the Rotary Environment

Rotary engines generate immense under-hood heat, and the electrical system is often the first point of failure. This adapter harness utilizes high-temperature, automotive-grade TXL wiring and OEM-specification connectors to ensure a connection that is physically robust and electrically noiseless. By plugging directly into the factory loom, it eliminates the invasive cutting and splicing that ruins collector-grade vehicles. This harness routes all critical inputs—crank angle sensors, MAP, TPS, and temperature data—directly to the Nexus VCU, whilst distributing outputs to injectors and ignition coils with zero voltage drop.

Operational Benefits

• Reversible Installation: Installs without modifying the factory harness, preserving the chassis value.
• Signal Integrity: Shielded sensor grounds ensure accurate data for the VCU’s high-speed processors.
• Expansion Ready: Includes an auxiliary I/O plug for adding aftermarket sensors not present in the factory loom.

Fitment Guide

Vehicle: Mazda RX-7 FD3S Series 6 (Approx. 1992-1995)
Connector Style: 2-Row ECU Plug
Transmission: Manual Transmission Only

Technical Specifications

Summary & What’s Included

The professional way to wire a Nexus VCU into your Series 6 RX-7.

Includes:

• Plug ‘n’ Play Adaptor Harness
• M14 x 1.5 Air Temp Sensor
• Auxiliary I/O Plugs and Pins
• Note: ECU/VCU NOT Included