The Problem of Greenwashing and Consumer Trust

Industry & Competitive Context

Greenwashing the practice of marketing a product, service, or corporate identity as more environmentally responsible than it verifiably is has become one of the most consequential risks in modern brand strategy. Regulators across major markets have moved from issuing warnings to imposing direct financial and reputational penalties, confirming that the problem is not confined to one company or one sector. In October 2022, the UK’s Advertising Standards Authority (ASA) banned HSBC advertisements for omitting material information about the bank’s continued financing of fossil-fuel projects while presenting itself as a climate leader. In June 2023, the ASA similarly banned a set of Shell advertisements under its “Make the Future” campaign for giving a misleading impression of the proportion of Shell’s business dedicated to renewable and low-carbon energy relative to its oil and gas operations. In September 2023, the U.S. Securities and Exchange Commission fined DWS Group, the asset-management arm of Deutsche Bank, $19 million for making misleading statements about the extent to which it incorporated Environmental, Social, and Governance (ESG) criteria into its investment process. These cases, spanning banking, energy, and asset management, demonstrate that greenwashing exposure now sits squarely within the domain of regulators, not merely public opinion.

Within this broader pattern, the automotive sector’s defining case remains Volkswagen’s “Clean Diesel” marketing campaign and the subsequent emissions scandal that became publicly known from September 2015 onward, commonly referred to as “Dieselgate.” It is among the most extensively documented instances of a gap between environmental marketing claims and verified product performance, substantiated by regulatory filings, a guilty plea in U.S. federal court, and multibillion-dollar settlements.

Brand Situation Prior to the Campaign

In the years preceding 2015, Volkswagen pursued a strategy of expanding diesel-powered vehicle sales in the United States, a market that had historically been skeptical of diesel passenger cars due to their association with noise, poor emissions performance, and sluggish acceleration compared with gasoline engines. Volkswagen’s response was to market its turbocharged direct-injection (TDI) diesel engines under the “Clean Diesel” label, positioning these vehicles as delivering strong fuel economy and driving performance while meeting U.S. emissions standards. This positioning was central to the brand’s broader “Das Auto” corporate tagline used in Volkswagen’s global advertising during this period, which emphasized engineering credibility and technical trustworthiness as core brand attributes.

Strategic Objective

Volkswagen’s documented commercial objective, as described in its own public communications and annual reporting from this period, was to grow global vehicle sales and specifically to increase its share of the U.S. passenger car market, where diesel penetration remained low relative to Europe. Marketing diesel vehicles as “clean” was intended to resolve the apparent trade-off between performance, fuel efficiency, and environmental compliance, allowing Volkswagen to appeal simultaneously to cost-conscious, performance-oriented, and environmentally concerned consumer segments within a single product line.

Campaign Architecture & Execution

The “Clean Diesel” campaign ran across national advertising channels in the United States and asserted that Volkswagen’s TDI diesel vehicles achieved low emissions while meeting U.S. federal and state environmental standards. On September 18, 2015, the U.S. Environmental Protection Agency (EPA), acting jointly with the California Air Resources Board (CARB), issued a Notice of Violation of the Clean Air Act to Volkswagen, stating that the company had installed software subsequently termed a “defeat device” in certain diesel vehicles that could detect when a vehicle was undergoing official emissions testing and alter engine performance accordingly to produce compliant results. Under normal driving conditions, the EPA stated, the vehicles emitted nitrogen oxides (NOx) at levels significantly above the standards the “Clean Diesel” marketing had implied the vehicles met. The EPA’s initial notice covered approximately 482,000 four-cylinder diesel vehicles sold in the United States since 2009. On September 22, 2015, Volkswagen publicly acknowledged that the software was present in approximately 11 million diesel vehicles worldwide.

On March 29, 2016, the U.S. Federal Trade Commission (FTC) filed a lawsuit against Volkswagen Group of America, alleging that the company’s national “Clean Diesel” advertising campaign had deceived consumers by representing the affected vehicles as low-emission and environmentally friendly when the company knew, through its own engineering processes, that this was not the case under real-world driving conditions. The FTC complaint specifically addressed the marketing campaign as a distinct instance of deceptive advertising, separate from the underlying emissions violations addressed by the EPA and CARB.

Positioning & Consumer Insight

The underlying consumer insight that the “Clean Diesel” campaign sought to exploit was the belief, prevalent among a segment of U.S. car buyers, that environmental responsibility required a trade-off against performance, cost, or driving experience. By branding its diesel engines as “clean,” Volkswagen positioned itself as having resolved this trade-off through superior German engineering a claim that aligned with the company’s broader “Das Auto” positioning around technical precision and reliability. This positioning was strategically significant because it allowed Volkswagen to compete simultaneously on three attributes fuel economy, performance, and environmental compliance that are generally understood in automotive marketing to involve engineering compromises. The subsequent regulatory findings established that this resolution had not, in fact, occurred through engineering achievement, but through software designed to circumvent testing protocols, which materially undermined the specific insight on which the campaign’s credibility depended.

Media & Channel Strategy

Verified public information on the “Clean Diesel” campaign’s specific media channels is limited primarily to what is documented in the FTC’s March 2016 complaint, which characterized the campaign as a national advertising effort conducted over several years across broadcast and print advertising in the United States, in addition to point-of-sale and dealership marketing materials describing the vehicles’ emissions performance. The FTC complaint treated the campaign as a sustained, multi-year marketing effort rather than an isolated advertisement, which is a material fact in assessing the scale of consumer exposure to the claims later found to be unsubstantiated.

Business & Brand Outcomes

The documented outcomes of the scandal were severe and multidimensional. Volkswagen’s share price fell sharply in the days following the EPA’s September 18, 2015 notice; by September 23, 2015, the stock had lost roughly a third of its value compared to its level immediately prior to the disclosure, as reported contemporaneously by multiple financial news outlets. On September 23, 2015, Volkswagen CEO Martin Winterkorn announced his resignation, stating that he was doing so in the interest of the company despite maintaining that he was not personally aware of any wrongdoing.

On October 25, 2016, a U.S. federal judge approved a $14.7 billion settlement between Volkswagen, the U.S. government, and affected vehicle owners, covering approximately 475,000 2.0-liter diesel vehicles. This settlement included approximately $10.03 billion allocated to a compensation and buyback or repair program for affected owners, $2.7 billion directed to an environmental mitigation trust, and $1.2 billion committed to investment in zero-emission vehicle infrastructure and access in the United States.

On March 10, 2017, Volkswagen pleaded guilty in U.S. federal court to three felony counts related to the emissions scandal, including conspiracy to defraud the United States, obstruction of justice, and the importation of merchandise through false statements. As part of this plea, the company agreed to pay $4.3 billion in combined criminal and civil penalties, separate from the civil settlement reached in 2016. Several Volkswagen engineers and executives were separately indicted or pleaded guilty to related criminal charges in connection with the scandal. By the early 2020s, Volkswagen’s own financial disclosures indicated that cumulative global costs associated with the diesel emissions matter, including fines, settlements, buybacks, and related expenses across multiple jurisdictions, had exceeded $30 billion.

Strategic Implications

The Volkswagen “Clean Diesel” case illustrates several principles with direct relevance to marketing and brand strategy. First, environmental or compliance-related claims used as a central pillar of brand positioning carry asymmetric risk: the reputational and financial cost of disproving such a claim through independent regulatory testing vastly exceeds the commercial benefit the claim generated while unchallenged. Second, the case demonstrates that greenwashing exposure is no longer solely a reputational matter managed through public relations; it is now an enforceable legal and financial liability pursued concurrently by environmental regulators (the EPA and CARB), consumer protection regulators (the FTC), and criminal prosecutors (the U.S. Department of Justice), each applying independent legal standards to the same underlying marketing claims. Third, the gap between the “Clean Diesel” campaign’s claims and the vehicles’ actual, verified emissions performance shows that marketing credibility in environmental claims is ultimately contingent on technical substantiation that can be independently tested by third parties a condition that distinguishes environmental marketing claims from many other categories of brand positioning that are less susceptible to objective verification. Finally, the comparison with the later HSBC, Shell, and DWS cases indicates that regulatory scrutiny of environmental and ESG-related marketing claims has become a standing feature of the competitive and compliance environment across multiple industries, rather than a risk isolated to the automotive sector or to the period immediately following the Volkswagen disclosures.