Daimler warns: EPA’s NoX fines could cost truckmakers $7,000 per engine
Daimler Truck North America has sounded the alarm over a proposed Environmental Protection Agency (EPA) rule that would allow truck manufacturers to pay fines instead of meeting strict nitrogen oxide (NoX) emissions standards.
The EPA’s proposed amendments to the NoX rule, released in July, include a controversial provision for non-compliance penalties (NCPs). The current standard is 0.2 bhp-hr, marking a significant tightening of regulations.
Daimler opposes paying to pollute
Dan Potter, Manager of Product Compliance and Regulatory Affairs at Daimler, criticised the NCP proposal during a media event at the company’s proving grounds in Madras, Oregon. “We believe that the EPA did a good job when they wrote this rule, creating flexibility, building it into the rule, and we believe it helps support the product we are intending to bring in 2027 and further years,” Potter said. However, he emphasised that NCPs could create an uneven playing field, allowing competitors to bypass compliance through financial penalties rather than engineering solutions.
“Federal law governs how and why the EPA is supposed to use them,” Potter added. “They can or must be used when there is a manufacturer that is unable to meet standards for technological reasons.".
“The option to use expanded credit allowances and NCPs puts those investments at risk,” the association warned.
What the rule means for truck operators and the environment
The core NoX standard of 0.035 bhp-hr, which was not part of the amendment process, remains set to take effect next year. Daimler’s Detroit 6 engine, designed to meet this standard, will be available on the Freightliner Cascadia model in the upcoming model year.
One aspect of the EPA’s proposal that received broad support from the trucking industry was the decision to retain the current 5-year/100,000-mile emissions warranty, rather than extending it to 10 years and 450,000 miles. Potter highlighted the financial impact of this change, stating, “We think in terms of impact to the customer, the proposal to get rid of the warranty extension for 2027 is going to make the biggest bottom line impact.”
The EPA’s amendments also include changes to diesel exhaust fluid (DEF) policies, replacing drastic vehicle slowdowns with warnings when DEF levels are low. However, DEF is not being phased out, contrary to online disinformation. The proposed changes would be the second major adjustment to DEF policy this year, following the elimination of DEF sensors earlier in 2026 to combat deratements, particularly in agricultural applications.
“Maybe the situation is very leveling now and maybe to our advantage a little bit in that the NCPs are allowing everybody to make sure we get the right products out there validated so the customers get the experience with the products,” Feight said. However, this view contrasts sharply with the concerns raised by Daimler and the EMA, which argue that NCPs could delay the adoption of cleaner technologies.
As the comment period for the EPA’s amendments closed in late August, the debate over NCPs continues to intensify. For truck operators, the outcome could mean the difference between investing in compliant, cleaner engines or facing higher costs from fines passed on by manufacturers. The EPA is expected to finalise the rule in the coming months, with the core NoX standard set to take effect next year.
Daimler’s opposition to NCPs reflects broader concerns within the industry about the balance between regulatory flexibility and environmental responsibility. With the Detroit 6 engine already meeting the new standards, the company is positioning itself as a leader in clean truck technology. However, the potential for NCPs to disrupt this progress remains a significant concern for both manufacturers and environmental advocates.
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