(CDTI) Announces New Honda Vehicle Award

VENTURA, Calif., March 11, 2014  — Clean Diesel Technologies, Inc. (Nasdaq:CDTI) (“CDTi” or the “Company”), a leader in advanced emissions control solutions, announced that it has begun production of catalysts featuring CDTi’s high-performance Mixed Phase Catalyst (MPC^®) technology for Honda’s 2015 Acura TLX model. Shipments are expected to commence in the first half of 2014.

Along with the Acura TLX, CDTi also provides its catalyst solutions to Honda for North American versions of their four- and six-cylinder Accord, Acura TSX and RLX, as well as Hybrid and Plug-In Hybrid models.

The MPC^® design is focused on superior thermal stability, giving its catalyst products critical attributes that differentiate them from competing offerings:

• Significantly improved performance for a given level of precious metals — to meet increasingly stringent emissions standards and powertrain diversification; and
• Greatly reduced precious metal loadings to achieve a given emission standard.

“We are proud to be named Honda’s catalyst supplier for the 2015 Acura TLX. Having our advanced catalyst technologies on a growing number of Honda vehicle platforms—currently 6— is a testament to CDTi’s ability to provide market-leading solutions to our customers. The demand for greater emission reduction continues to grow across all vehicle segments as evidenced by the recent U.S. Environmental Protection Agency’s announcement of Tier 3 standards. Our MPC^® technology is well suited to meet this trend. We are continually evolving our technologies to assure our customers are supplied with catalyst products that give them sustainable performance and cost advantage in the highly competitive environment they face,” said Nikhil Mehta, Office of the CEO and Chief Financial Officer.

CDTi’s Catalyst division began delivering catalysts to Honda in 2001 — offering a unique combination of high performance and low platinum group metal content, resulting in significant economic benefits. Since then, CDTi’s catalysts have been sourced for new model programs that typically span four to five years, including the popular model years 2004, 2008 and 2013 Accord as well as other existing and new Honda models.

About CDTi

CDTi is a vertically integrated global manufacturer and distributor of emissions control systems and products, focused on the heavy duty diesel and light duty vehicle markets. CDTi utilizes its proprietary patented Mixed Phase Catalyst (MPC^®) technology, as well as its ARIS^® selective catalytic reduction, Platinum Plus^® fuel-borne catalyst, and other related technologies to provide high-value sustainable solutions to reduce emissions, increase energy efficiency and lower the carbon intensity of on- and off-road combustion engine systems. CDTi is headquartered in Ventura, California and currently has operations in the U.S., Canada, France, Japan and Sweden. For more information, please visit www.cdti.com.

Forward-Looking Statements Safe Harbor

Certain information contained in this press release constitutes forward-looking statements. Any statements contained herein that are not statements of historical fact should be considered forward-looking statements, and include in this press release statements regarding product attributes, sourcing, and expected shipments, CDTi’s relationship with Honda, and technology trends. Forward-looking statements involve known or unknown risks, including, without limitation, the potential inability of CDTi’s products to evolve, remain attractive to customers, or meet evolving standards or trends, the possible loss of CDTi’s status as a named Honda supplier, unforeseen difficulties or delays in CDTi’s ability to supply its products, the slowdown or stoppage of demand for emission reduction technologies, and the inability of CDTi to source its products for new model programs. In addition, reference is made to the risks detailed in CDTi’s filings with the U.S. Securities and Exchange Commission. Readers are cautioned not to place undue reliance on any forward-looking statements, which speak only as of the date made. CDTi assumes no obligation to update the forward-looking information contained in this press release.

CONTACT: Kevin M. McGrath
         Cameron Associates, Inc.
         Tel: +1 (212) 245-4577