Nexus Integration for Late FD: Adaptor Harness for S7/S8
The Nexus S2/S3 Plug ‘n’ Play Adapter Harness brings the power of Haltech’s Nexus VCUs to the Series 7 and 8 Mazda RX-7 (1996-2002). This harness connects the factory 4-row ECU header directly to a Nexus S2 or S3 unit, enabling modern control over the 13B-REW without custom wiring.
Engineering for the Nexus Platform
This harness maps the FD’s sensors and actuators to the Nexus VCU. It supports the factory crank angle sensor, metering oil pump, and sequential turbo solenoids (Nexus S3 recommended for full twin turbo support). The harness includes an auxiliary I/O connector for adding aftermarket sensors like wideband O2 and fuel pressure. An air temp sensor is included for Speed Density conversion.
Operational Benefits
Upgrading to a Nexus VCU provides features like Wi-Fi tuning, onboard logging, and advanced rotary protection strategies. The installation is clean and reversible. The harness ensures that the vehicle retains its factory dashboard functionality while gaining motorsport-grade engine management.
Fitment Guide
- Mazda RX-7: FD3S Series 7 (1996-1998) & Series 8 (1999-2002)
- Transmission: Manual Only
Technical Specifications
| Parameter | Specification |
|---|---|
| Supported VCU | Nexus S2 or Nexus S3 |
| Connector Type | 4-Row Factory Header |
| Transmission | Manual Only |
| Feature Note | S3 required for Twin Turbo control |
Summary & Includes
Includes:
- 1 x Injection Molded Plug ‘n’ Play Adaptor Harness
- 1 x M14 x 1.5 Air Temp Sensor with matching plug and pins
- 1 x Auxiliary I/O 16 Pin Tyco plug and pins
Note: Manual transmission only. Nexus S2 supports single turbo only. Nexus S3 supports factory twin turbo.
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