The Ultimate VCU Upgrade for the GDB WRX
The Nexus S3 Plug ‘n’ Play Adapter Harness Kit is the premier engine management solution for the Subaru GDB WRX (MY01-05). This kit combines the industry-leading Nexus S3 VCU with a specific adaptor harness for the cable-throttle GDB platform, offering a level of control and data acquisition previously unavailable for this chassis.
Revolutionary Control
The Nexus S3 integrates an ECU, Data Logger, and PDM into one unit. This kit allows you to replace the 20-year-old factory ECU with a system capable of 128MB data logging, advanced traction control, and comprehensive engine protection. The adaptor harness ensures a plug-and-play installation for the engine controls, while the PDM functionality stands ready to modernize your vehicle’s power distribution.
Fitment Guide
Vehicles: Subaru WRX GDB (MY01-05), STI (JDM/ADM MY01-05)
Throttle: Non-Drive-By-Wire (Cable Throttle) Only
Transmission: Manual Only
Technical Specifications
| VCU Model | Haltech Nexus S3 |
| System Type | VCU + PDM + Logger |
Summary & What’s Included
The future of engine management for the GDB WRX.
Includes:
- Nexus S3 VCU
- Adaptor Harness
- Air Temp Sensor
- Auxiliary Plugs
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