ETEC engines under went several key changes and improvements from their early models in 2006 through the following years until production ceased in 2020. Here's a breakdown of the major differences and developments:

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1. Emissions and Fuel Efficiency Improvements

• 2006 Models already offered low emissions, meeting EPA and CARB standards.

• Later Models (2007–2010 onward) saw continued refinement in combustion efficiency, reducing emissions further while improving fuel economy.

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2. Onboard Diagnostics and ECM (Engine Control Module) Upgrades

• Earlier ECMs (2006–2007) had more basic diagnostic capabilities.

• Post-2008 ECMs received better mapping, more sophisticated self-diagnostics, and improved fault-code tracking, often requiring newer diagnostic software to access.

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3. Midsection and Gearcase Refinements

• Around 2008–2009, BRP introduced a redesigned gearcase on many models for better hydrodynamics and durability.

• Stronger midsections were developed to handle higher horsepower models and minimize vibration, especially in the high-output (H.O.) models.

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4. iCommand and Rigging Systems

• 2006 models used mostly analog gauges and basic wiring harnesses.

• From 2007 onward, BRP rolled out iCommand, a digital gauge and control system integrating NMEA 2000 networking for real-time engine and boat data.

• Digital throttle and shift (DTS) became available in larger E-TEC models over time.