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Vehicle-Specific ECU KitsNexus S3
Nexus S3 Plug n Play Adapter Harness Kit — Subaru WRX / STI (ADM) MY12-18
Haltech · HT-213312
$2,590
This package combines a Nexus S3 controller with the application-specific hardware named in the listing. Confirm vehicle, model year, engine, transmission, throttle, and connector compatibility before ordering.
Backordered — current lead time will be confirmed before fulfillment.
See the shop policies for shipping and return eligibility.
Best fit
- Your vehicle uses a supported existing harness and you've confirmed Elite or Nexus ECU fitment.
- You want to review wiring scope, ECU selection, and your tuning plan together before you order.
Choose this instead
- Choose a universal wire-in harness if your wiring needs to be custom-built around the car instead of following a verified factory wiring plan.
Application notes
- Not sure this is the right part? Send us your vehicle, engine package, wiring approach, sensor set, and CAN layout and we'll help you choose.
- Intended for sanctioned off-road and competition vehicles that aren't emissions-controlled. You and your installer are responsible for compliance with applicable laws and regulations.