Boomslang EMS-4 Plug N Play Harness
2004–2005 Scion xA / xB
BF14047
Overview:
The Boomslang AEM EMS-4 Plug N Play Harness is a precision-engineered wiring solution designed specifically for 2004 to 2005 Scion xA and xB models. This harness enables seamless integration of the powerful AEM EMS-4 engine management system with your vehicle’s factory ECU without any wire splicing or permanent modifications. Ideal for enthusiasts and tuners seeking enhanced control over fuel and ignition timing, this harness preserves all factory functions such as dash gauges, air conditioning, and drive-by-wire throttle systems.
By maintaining the factory ECU’s role in managing non-engine-critical systems, the Boomslang harness ensures a clean, reliable installation that is both easy to install and uninstall. It is the perfect upgrade path for those looking to unlock the full potential of the AEM EMS-4 while retaining the convenience and functionality of the stock electronics.
Key Features:
This plug and play harness offers a range of benefits that simplify installation and maximize engine management capabilities:
- Direct adaptation of the AEM EMS-4 to the factory ECU with zero wire splicing
- Full control over fuel delivery and ignition timing through the EMS-4 unit
- Factory ECU remains active to manage dash instrumentation, air conditioning, and drive-by-wire throttle
- USB connector pre-wired for straightforward laptop tuning and data logging
- Factory check engine light disabled where possible to avoid false alerts
- Sub-harnesses are custom fabricated—no core harnesses required
- Plug and play design ensures quick installation and removal without damage to factory wiring
- Compatible with aftermarket crank and cam angle sensors if required for your setup
- Free shipping included with every order
Construction & Design:
The Boomslang EMS-4 Plug N Play Harness is built with high-quality materials and precision engineering to ensure durability and reliability under demanding conditions. Each harness is custom fabricated to fit the specific wiring layout of the 2004–2005 Scion xA and xB, eliminating guesswork and reducing installation time. The connectors and wiring are designed to meet or exceed OEM standards, providing secure connections and resistance to heat, vibration, and moisture.
Special attention is given to maintaining factory wiring integrity, so your vehicle’s original harness remains untouched. This approach safeguards your investment and allows for easy reversion to stock if desired.
Installation & Fitment:
Installation is straightforward thanks to the plug and play design. The harness connects directly between the AEM EMS-4 unit and the factory ECU harness without cutting or splicing wires. This reduces installation time and the risk of wiring errors. Some vehicles may require an aftermarket crank or cam angle sensor disc to fully utilize the EMS-4’s capabilities, so be sure to verify your setup requirements before installation.
The harness is designed exclusively for 2004 and 2005 Scion xA and xB models, ensuring a perfect fit and compatibility with factory systems.
What's Included:
- Boomslang AEM EMS-4 Plug N Play Harness for 2004–2005 Scion xA / xB
- Pre-wired USB connector for tuning interface
- Custom fabricated sub-harnesses tailored for factory ECU integration
- Installation instructions and support documentation
Ideal For:
This harness is ideal for Scion xA and xB owners who want to upgrade to the AEM EMS-4 engine management system without compromising factory electronics or spending hours on complex wiring. It suits performance enthusiasts, tuners, and professional shops looking for a reliable, clean, and reversible solution to gain full EMS control over fuel and ignition while maintaining all OEM conveniences.
