DTNA Commits to Only EPA 2027 Engines When NOx Rules Launch

Daimler Truck North America (DTNA) has announced that it will only sell EPA 2027-compliant engines starting January 1, 2027, and will not maintain separate engine programs for 2026 engines. This decision differs from other manufacturers such as Cummins and Paccar, which plan to continue offering 2026 engines. DTNA’s EPA 2027-compliant engines, including the Gen 6 DD13, DD15, and DD16, will be available in January 2027 and January 2028. The company’s decision is based on its confidence in the performance of its new engines, which use a pre-selective catalytic reduction system to meet the tougher NOx standards. The EPA’s draft revision of its nitrogen oxide emissions rule includes rolling back warranty requirements for new heavy-duty trucks, which is expected to result in emissions-related warranty savings of up to $6,000 per vehicle. DTNA’s CEO, John O’Leary, stated that the company’s decision to only sell EPA 2027-compliant engines is due to its confidence in the technical solution and the expected performance of the new engines. The company’s engines do not require 48-volt electrically heated aftertreatment components, which is expected to cut the price of DTNA’s 2027 EPA-compliant engines. The introduction of the new engines has been a concern for the industry, with potential price hikes estimated at $20,000, but the EPA’s draft rulemaking is expected to reduce these costs.