Haltech NEXUS Plug-In ECU – Mazda RX-8 SE3P | 13B-MSP

Take full control of your Mazda RX-8's 13B-MSP twin-rotor engine with the Haltech NEXUS Plug-In ECU — a direct plug-in replacement for the factory ECU that brings the full power of the Haltech NEXUS standalone platform to your RX-8 without cutting a single wire. Whether you're building a naturally aspirated high-revving street car or a turbocharged track weapon, the NEXUS plug-in delivers the tuning capability to extract every last revolution from the rotary — with rotary-specific leading and trailing ignition control built in.

Key Features

• Direct Plug-In Fitment: Replaces the factory RX-8 ECU using the OEM connector — no wiring modifications required for a clean, professional installation
• Haltech NEXUS Platform: Full-featured standalone ECU with advanced fuel, ignition, boost, traction control, and launch control capabilities — all the power of a full standalone with plug-in simplicity
• Rotary-Specific Tuning: Supports the unique fuelling and ignition requirements of the 13B-MSP twin-rotor engine — including independent leading and trailing ignition control for precise rotary engine management
• Built-In Wideband Lambda Input: Integrated wideband O2 input for accurate closed-loop fuelling and real-time AFR monitoring during tuning
• CAN Bus Connectivity: Expandable via CAN bus for additional sensors, displays, and Haltech accessories including WB1/WB2 wideband controllers and IO expansion harnesses
• Haltech ESP Software: Configured and tuned using Haltech's Elite Software Platform (ESP) — powerful, intuitive, and widely supported by professional tuners worldwide

Specifications

• Type: Plug-In Standalone ECU
• Platform: Haltech NEXUS
• Fitment: Mazda RX-8 (SE3P) — 13B-MSP Twin-Rotor
• Installation: Direct OEM Connector — No Wiring Modification Required
• Software: Haltech ESP (Elite Software Platform)
• Part Number: HT-231401

Note: Professional installation and dyno tuning by an experienced Haltech tuner is required to realize the full capability of this ECU. A wideband O2 sensor kit and IO expansion harness are recommended for a complete engine management solution. Verify fitment for your specific RX-8 variant before ordering.