The X12 engine is an optimal choice for vocational and regional haul truck fleets that need maximum payload without compromising performance capability. Vocational ratings maintain a governed engine speed of 2000 RPM, which optimizes driving performance while allowing for greater flexibility in axle ratio and transmission selections. From soft surface to highway speeds, the X12 provides the performance needed to get the job done.

In regional haul trucks, the 2024 X12 can be paired with the Endurant™ HD™ automated manual transmission from Eaton Cummins Automated Transmission Technologies. With this pairing comes the option for EX ratings, which offer features* like On-Ramp Boost, Predictive Gear Shifting, Predictive Engine Braking and Dynamic Power. Watch this short video to learn more about these features.

Keeping efficiency in mind, the 1800 RPM governed speeds along with an optimized shift calibration with the Endurant HD means the X12 offers excellent fuel economy without sacrificing driving characteristics. Regardless of application, all 2024 X12 On-highway truck customers will have the option for a longer fuel filter, which allows for an extended fuel filter interval that matches the 75,000-mile (120,000 Km) market-leading oil drain interval.

*Require Endurant HD transmission and GPS look-ahead data

Know more. Experience the best from your engine.

Cummins' commitment to engine innovation carries through to digital products and services that enhance the entire life of every Cummins engine. This includes connecting real-time data from vehicles on the road to maintenance and service operations, giving customers an unparalleled ability to look ahead, optimize operations, and minimize downtime.

Our engines come available with first-fit connectivity from the point of sale through Acumen®, our smart computing hardware, or via an OEM telematics device. These first-fit devices offer immediate access to Cummins’ full suite of digital capabilities, Connected Solutions®.  

• Remote Diagnostics – Real-time monitoring of fault alerts and predictive insights for Cummins engines, helping fleets avoid unplanned downtime and reduce costs 
• Over-the-Air Programming – Optimize your Cummins engine’s performance and efficiency by updating software and parameters remotely over-the-air 
• Digital Service Tools – Guidanz® is Cummins’ all-in-one servicing technology suite that helps increase service bay productivity, repair speed and workflow management for a legendary service experience