EPA Finds Connecticut Company Sold 2,497 Illegal Emission Defeat Devices
NCD LLC sold devices that disabled emission controls on diesel vehicles between 2020 and 2023, increasing harmful air pollution that threatens public health. The company paid $60,000 to settle Clean Air Act violations.
Between January 2020 and October 2023, NCD LLC sold approximately 2,497 illegal defeat devices including tunes, tuners, exhaust kits, and EGR block plates. These products were designed to bypass or disable emission control systems required by law to reduce air pollution from diesel vehicles. The EPA found the company violated the Clean Air Act by manufacturing and selling parts that defeat pollution controls, leading to a $60,000 penalty and requirements to stop all such sales.
This case reveals how profit motives can override public health protections, with penalties that may not match the environmental harm caused.
The Allegations: A Breakdown
| 01 | NCD LLC manufactured, sold, offered to sell, and caused the sale of parts or components intended for use with motor vehicle engines where the principal effect was to bypass, defeat, or render inoperative emission control elements like EGR, DPF, SCR, catalysts, and OBD systems. The company knew or should have known these parts were being offered for sale or installed for such illegal use. | high |
| 02 | Between January 2020 and October 2023, NCD LLC sold approximately 2,497 defeat devices including tunes, tuners, exhaust kits, and EGR block plates. The company provided sales data to EPA showing this pattern of violations spanning nearly four years. | high |
| 03 | NCD LLC operated as an e-commerce automotive sales shop in Middletown, Connecticut, systematically marketing and distributing products designed to dismantle crucial emission control systems on diesel vehicles. These systems are mandated by federal law to reduce particulate matter and nitrogen oxides. | high |
| 04 | The company sold devices that remove or render inoperative emission control devices and elements of design installed on motor vehicles in compliance with Clean Air Act regulations. This directly violated Section 203(a)(3)(B) of the Clean Air Act. | high |
| 05 | NCD LLC provided invoice data for 2020 to 2023 that documented sales of parts and components which bypass, defeat, or render inoperative emission control components, elements of design, or emission related parts. This data came from the company’s own business records. | medium |
| 06 | Tyler Brancifort, the owner of NCD LLC and operator of North Coast Diesel Performance, had direct knowledge and control over the business practices that violated federal environmental law. The settlement terms bind him personally to ensure compliance. | medium |
| 07 | The company sold defeat devices that alter engine fueling strategies and disable onboard diagnostic systems required by EPA regulations for vehicles manufactured after 2007. These OBD systems detect emission system problems and alert drivers to malfunctions. | medium |
| 08 | NCD LLC marketed products affecting Exhaust Gas Recirculation, Clean Gas Induction, Diesel Oxidation Catalysts, Diesel Particulate Filters, and Selective Catalytic Reduction systems. Engine manufacturers use these devices to meet emission standards reflecting the greatest degree of emission reduction achievable through available technology. | high |
| 01 | EPA determined the penalty amount of $60,000 after analyzing NCD LLC’s financial information and finding the company had a limited ability to pay. This financial hardship consideration substantially reduced the potential penalty despite nearly 2,500 violations. | high |
| 02 | The settlement allows NCD LLC to resolve the matter without admitting to the alleged violations of law. The company only admits to jurisdictional allegations and stipulated facts while neither admitting nor denying it broke environmental laws. | high |
| 03 | EPA issued its Finding of Violation on March 4, 2024, after NCD LLC had already sold defeat devices for over four years. The information request did not go out until October 2023, allowing the illegal business practice to continue for an extended period. | medium |
| 04 | The maximum penalty under Section 205(a) of the Clean Air Act is $5,761 per part or component. NCD LLC sold 2,497 devices, which could have resulted in penalties exceeding $14 million, yet the company paid only $60,000. | high |
| 05 | The consent agreement includes no criminal sanctions despite Section 113(c) of the Clean Air Act authorizing criminal prosecution. EPA chose administrative settlement over pursuing criminal charges that could include imprisonment. | medium |
| 06 | NCD LLC must only remove defeat devices from vehicles it owns and from its own inventory. The settlement does not require the company to track down, notify, or remediate the approximately 2,497 devices already sold to customers and potentially still in use. | high |
| 07 | The enforcement relied entirely on NCD LLC self-reporting through responses to EPA information requests. No evidence suggests proactive monitoring or marketplace surveillance led to discovery of these violations. | medium |
| 01 | NCD LLC generated revenue from 2,497 defeat device sales over 46 months, creating a steady income stream from products the company knew or should have known violated federal environmental law. The $60,000 penalty amounts to just $24.02 per illegal device sold. | high |
| 02 | The company operated an e-commerce platform that made defeat devices easily accessible to consumers nationwide. This business model prioritized market reach and sales volume over legal compliance with Clean Air Act requirements. | high |
| 03 | NCD LLC catered to consumer demand for devices that disable emission controls, often marketed for perceived performance gains or to avoid maintenance costs of emission control systems. The company built a business around facilitating Clean Air Act violations. | high |
| 04 | The settlement penalty of $60,000 was reduced based on NCD LLC’s claimed limited ability to pay, creating a system where companies can profit from illegal activity and then claim poverty to reduce consequences. This incentivizes a cost-benefit calculation where violations may be worth the risk. | high |
| 05 | NCD LLC maintained websites and social media platforms advertising defeat devices and tampering services. The consent agreement requires removal of this content within 14 days, but the company profited from these marketing channels for years. | medium |
| 06 | The company sold devices to customers across the United States, expanding its market beyond Connecticut state borders. This geographic reach maximized profit while spreading environmental harm to multiple communities. | medium |
| 01 | Nitrogen oxide emissions from vehicles with disabled controls contribute to smog formation and acid rain, and can exacerbate respiratory diseases like asthma. NCD LLC’s defeat devices directly increased NOx pollution by disabling systems designed to limit these emissions. | high |
| 02 | Particulate matter released when diesel particulate filters are bypassed causes serious health problems including heart disease, lung disease, and premature death. The 2,497 devices sold could affect thousands of vehicles emitting harmful particles into communities. | high |
| 03 | Congress enacted Title II of the Clean Air Act after finding that increasing motor vehicle use resulted in mounting dangers to public health and welfare. NCD LLC’s actions directly undermined this legislative purpose to protect air quality and promote public health. | high |
| 04 | Emission control systems like SCR, DPF, DOC, and EGR reflect the greatest degree of emission reduction achievable through available technology. Defeating these systems returns vehicles to pollution levels that modern engineering has made obsolete. | high |
| 05 | Engine fueling strategies like retarded fuel injection timing serve as primary elements of design to limit NOx emissions. Defeat devices that alter these strategies cause significant increases in pollution with very substantial impacts on emission rates. | medium |
| 06 | Onboard diagnostic systems required since 2007 detect emission system problems and alert drivers to malfunctions. Disabling OBD prevents early detection of emission system failures, allowing vehicles to pollute at elevated levels without driver awareness. | medium |
| 07 | The Clean Air Act aims to protect and enhance the quality of the nation’s air resources to promote public health and welfare and the productive capacity of the population. NCD LLC’s systematic sale of defeat devices directly threatened this goal affecting entire communities exposed to increased vehicle emissions. | high |
| 01 | NCD LLC admitted only to jurisdictional allegations and stipulated facts, never admitting it violated environmental law. This consent agreement structure allows the company to settle without acknowledging wrongdoing, limiting reputational damage and future legal liability. | high |
| 02 | The settlement treats compliance as a strategic hurdle to clear with minimal financial impact rather than a moral baseline. NCD LLC engaged with regulation by meeting procedural requirements without embracing the substantive purpose of environmental protection laws. | high |
| 03 | EPA has authority to seek penalties up to $5,761 per violation, but NCD LLC paid approximately $24 per device after claiming financial hardship. This massive discount raises questions whether penalties adequately deter illegal conduct or simply become a manageable business cost. | high |
| 04 | The consent agreement acknowledges this proceeding constitutes an enforcement action that will be considered in future compliance history assessments. However, the lack of admission means NCD LLC avoided a formal finding of liability that could strengthen future cases. | medium |
| 05 | NCD LLC must notify customers who purchased defeat devices about the settlement, but faces no requirement to ensure customers remove illegal devices or restore vehicles to compliant condition. The environmental harm from devices already sold remains unaddressed. | high |
| 06 | The settlement binds Tyler Brancifort personally as owner of NCD LLC and North Coast Diesel Performance, yet he faces no individual penalties beyond corporate liability. Personal accountability for corporate environmental crimes remains limited to ensuring company compliance going forward. | medium |
| 07 | EPA reserves the right to revoke the settlement if it finds NCD LLC or Tyler Brancifort provided materially false information, but this protection only applies if deception is discovered after signing. The burden remains on EPA to prove information was false, not on the company to guarantee accuracy. | medium |
| 08 | The settlement resolves only federal civil penalties for specifically alleged violations. It does not address potential state law violations, citizen suit liability, or other federal enforcement actions beyond this particular case, leaving accountability gaps. | medium |
| 01 | NCD LLC posted on its Facebook page about the EPA fine, framing the penalty in terms favorable to the company. This public statement allowed NCD LLC to control narrative around enforcement action before broader public awareness. | medium |
| 02 | The consent agreement requires NCD LLC to post a public announcement about the settlement on its website and social media for at least 60 days. However, the company controls the exact wording and presentation of this announcement beyond EPA template language. | low |
| 03 | NCD LLC operated under multiple names including North Coast Diesel Performance, creating potential confusion about corporate identity. This naming complexity can obscure the full scope of business activities and make it harder for consumers to research company compliance history. | low |
| 04 | The settlement requires removal of website and social media content advertising defeat devices and tampering services within 14 days. This content removal happens after years of marketing illegal products, with no requirement to preserve evidence of past marketing claims. | medium |
| 01 | NCD LLC sold defeat devices from January 2020 through October 2023 before EPA issued its information request. The company operated its illegal business for 46 months before facing investigation, generating substantial revenue during this period. | high |
| 02 | EPA issued its Finding of Violation on March 4, 2024, five months after the initial information request. NCD LLC used this time to prepare responses across three separate submissions in November 2023, December 2023, and January 2024. | medium |
| 03 | The conference between NCD LLC and EPA representatives did not occur until April 19, 2024, more than a year after the company stopped selling defeat devices. This gap between cessation and settlement gave the company time to restructure its business. | low |
| 04 | The consent agreement was not signed until April 21, 2025, and filed May 16, 2025, more than a year after EPA’s Finding of Violation. This extended negotiation period allowed NCD LLC to avoid public disclosure while conducting settlement discussions. | medium |
| 05 | By the time enforcement concluded, NCD LLC had already removed defeat devices from its inventory and vehicles it owned as of April 19, 2024. The company completed required remediation before settlement finalized, potentially weakening EPA’s negotiating position on penalty amounts. | medium |
| 01 | NCD LLC sold 2,497 illegal defeat devices over 46 months, paid a $60,000 penalty averaging $24 per device, and admitted no legal wrongdoing. This outcome demonstrates how corporate violators can treat environmental penalties as manageable business costs rather than meaningful deterrents. | high |
| 02 | The case illustrates predictable outcomes when profit maximization drives business decisions in a system where external costs like pollution and public health impacts are not fully borne by companies that generate them. NCD LLC operated profitably for years before facing consequences. | high |
| 03 | Approximately 2,497 defeat devices remain in the marketplace on customer vehicles with no requirement for NCD LLC to track, remediate, or ensure removal. The environmental and public health harm from these devices continues beyond the settlement. | high |
| 04 | The enforcement action represents a legitimate effort to hold a company accountable for Clean Air Act violations, but the penalty structure raises questions about whether sanctions match the scale of environmental and public health risks created by systematic non-compliance. | high |
| 05 | This case reveals how businesses under neoliberal capitalism can engage with regulation by complying with procedural aspects of enforcement without full substantive accountability. Legal minimalism treats compliance as strategic exposure management rather than commitment to public good. | high |
| 06 | The settlement demonstrates that while the Clean Air Act provides vital enforcement tools, effectiveness hinges on consistent application and penalties that truly deter misconduct. Without meaningful financial consequences, some businesses may calculate that violation benefits outweigh risks. | high |
Timeline of Events
Direct Quotes from the Legal Record
“The information submitted by NCD indicates that between January 1, 2020, and October 16, 2023, NCD sold, offered to sell, and/or caused the sale of approximately 2,497 defeat devices which included tunes, tuners, exhaust kits, and EGR block plates.”
💡 NCD LLC’s own sales records documented nearly four years of systematic Clean Air Act violations.
“In enacting the CAA, Congress found, in part, that the increasing use of motor vehicles . . . has resulted in mounting dangers to the public health and welfare.”
💡 Congress created the Clean Air Act specifically to address health dangers that NCD LLC’s products increased.
“EPA finds that NCD manufactured, sold, offered to sell, and/or caused the sale of parts or components, intended for use with, or as part of, a motor vehicle or motor vehicle engine, where a principal effect of the part or component was to bypass, defeat or render inoperative elements of design that control emissions, such as the EGR, DPF, SCR, catalyst, OBD systems and/or other elements of design on motor vehicles and motor vehicle engines, and NCD knew or should have known that such part or component was being offered for sale or installed for such use or put to such use.”
💡 EPA found NCD LLC had knowledge its products would be used to violate federal environmental law.
“NOx contributes to the formation of smog and acid rain, and can exacerbate respiratory diseases like asthma. Particulate matter is linked to a range of serious health problems, including heart and lung diseases, and even premature death.”
💡 The defeat devices NCD LLC sold directly increased pollution that causes serious diseases and death.
“The CAA does not exempt off-road use only or competition only motor vehicles or motor vehicle engines. The definitions for motor vehicle at CAA § 216(2); 42 U.S.C. § 7550(2) and 40 C.F.R. § 85.1703 make no exemption for motor vehicles or motor vehicle engines used for competition.”
💡 Companies cannot evade Clean Air Act requirements by claiming products are for off-road or racing use.
“EPA conducted an analysis of Respondent’s financial information and determined Respondent has a limited ability to pay. Consequently, in accordance with applicable law, EPA determined that the Assessed Penalty is an appropriate amount to settle this action.”
💡 The penalty was substantially reduced based on NCD LLC’s claimed inability to pay the full amount.
“For the purposes of this proceeding, as required by 40 C.F.R. § 22.18(b)(2), Respondent: admits to the jurisdictional allegations in this CAFO; admits to the stipulated facts stated above and neither admits nor denies the alleged violations of law stated above.”
💡 The settlement allows NCD LLC to resolve enforcement without admitting it violated environmental law.
“Vehicle and engine emissions standards reflect the greatest degree of emission reduction achievable through the application of [available] technology.”
💡 Defeat devices eliminate the most advanced pollution controls that modern technology has developed.
“Injection timing has a very significant impact on NOx emission rates, with advanced timing settings being associated with higher NOx.”
💡 Tuners that alter fuel injection timing dramatically increase nitrogen oxide pollution.
“Any violation of this CAFO may result in a civil judicial action for an injunction or civil penalties of up to $5,761 per part or component, as provided in Section 205(a) of the CAA, 42 U.S.C. § 7524(a), and 40 C.F.R. § 19.4.”
💡 EPA had authority to seek over $14 million in penalties but settled for $60,000.
“Within 30 calendar days from the date of Respondent’s signatures on this CAFO, Respondent shall notify, in writing, all customers who purchased any of the devices, equipment, and services described in Paragraphs 29 and 37 of Respondent’s settlement with EPA.”
💡 NCD LLC must tell customers about the settlement but faces no requirement to remove devices from their vehicles.
“The provisions of this CAFO shall apply to and be binding upon Respondent and its officers, directors, employees, successors, and assigns (including but not limited to Tyler Brancifort, owner of NCD, LLC/North Coast Diesel Performance).”
💡 Owner Tyler Brancifort is personally bound to ensure the company complies with settlement terms.
“For purposes of the identification requirement in Section 162(f)(2)(A)(ii) of the Internal Revenue Code, 26 U.S.C. § 162(f)(2)(A)(ii), and 26 C.F.R. § 162-21(b)(2), performance of the conditions of this paragraph is restitution, remediation, or required to come into compliance with the law.”
💡 The settlement characterizes compliance actions as restitution, potentially affecting tax treatment.
“Penalties, interest, and other charges paid pursuant to this Agreement shall not be deductible for purposes of federal taxes.”
💡 NCD LLC cannot write off the $60,000 penalty as a business expense on federal tax returns.
“The EPA reserves the right to revoke this CAFO and settlement penalty if and to the extent that the EPA finds, after signing this CAFO, that any information provided by Respondent and Tyler Brancifort (owner of NCD, LLC and North Coast Diesel Performance) was materially false or inaccurate at the time such information was provided to the EPA.”
💡 EPA can void the settlement if it discovers NCD LLC or its owner provided false information.
Frequently Asked Questions
NCD LLC has a Facebook page which count can be found here: https://www.facebook.com/NorthCoastDieselPerformance/
Tyler B. / NCD LLC’s phone number is 860-807-6007
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