For the 2021 X12 we’ve updated our engine with a focus on improved reliability, lower maintenance cost, better performance, while meeting more stringent EPA Greenhouse Gas standards. The good news for Motorhome & RV customers is that lower Greenhouse Gas emissions means improved fuel economy. We’ve been able to do this by optimizing our existing technology, rather than introducing new emissions equipment. 

For 2021, the X12 maintains the 600 lb. weight savings compared to other engines in this class and produces up to 500 hp and 1,700 lb./ft of torque. A new optional air compressor resonator gives customers the option to reduce engine noise both inside and outside the vehicle. The X12 also features extended maintenance intervals for oil and filter up to 18 months and fuel economy improvements of 2.5%.

Features & Benefits

Support

• Cummins on Every Corner – Over 3,700 authorized locations across North America to support parts and service needs. 
• Peace of Mind — Base warranty backed by Cummins for a full 5 years/100,000 miles, whichever comes first. 
• Cummins Guidanz™ — This app allows you to read check engine lights and share via email with your service provider. 
• Longer Optional Extended Coverage — Unmatched full-engine coverage options of up to eight years are available, for peace of mind and predictable maintenance costs.