The Custom Builder’s VCU Solution
The Nexus S2 VCU + Plug and Pin Set provides the core Vehicle Control Unit hardware along with the necessary connectors for a completely custom installation. This kit is intended for professional wire harness fabricators who require the advanced capabilities of the Nexus S2—integrated PDM, data logging, and engine control—but prefer to construct their own mil-spec looms rather than modifying a universal harness.
Compact Powerhouse
The Nexus S2 is perfectly sized for 4-cylinder and 2-rotor engines, offering features like 4D boost control, traction control, and automatic transmission support. Its onboard PDM allows for solid-state switching of vehicle circuits, offering programmable current limits and retry logic for enhanced reliability. The included connector kit ensures a secure, weather-tight interface with the VCU.
Operational Benefits
- Total Fabrication Freedom: Build your harness with the exact wire types and lengths needed.
- Space Saving: Combines multiple modules (ECU, PDM, Wideband) into one small footprint.
- Connectivity: Dual-band Wi-Fi for cable-free communication and tuning.
Fitment Guide
Engine Compatibility: Up to 4 Cylinders / 2 Rotors
Installation Type: Custom Wire-in (Crimping Required)
Technical Specifications
| VCU Model | Haltech Nexus S2 |
| Connector Set | Superseal 34-Pin (Key 2 & 3) |
Summary & What’s Included
The essential hardware for custom Nexus S2 integrations.
Includes:
- Nexus S2 VCU
- Plug and Pin Set (34 Pin Key 2 & 3)
- SurLok Connectors
- USB-C Cable
- Wi-Fi Antenna












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