Amerigon Joins the New Russell Microcap(TM) Index

DEARBORN, Mich., June 28 -- Amerigon Incorporated today announced that it has joined the new Russell Microcap(TM) Index as Russell Investment Group reconstituted its family of 23 U.S. indexes on June 24. Russell recently posted a list of additions to its indexes at www.russell.com/US/indexes.

The addition of Amerigon to the index enables the company to be included in the portfolios of investors who rely on the Russell Indexes as part of their investment strategies. Index membership will remain in place for one year.

The new Russell Microcap Index, comprised of the securities of 2,000 microcap companies, is based on a ranking of all U.S. equities by market capitalization. This new index offers money managers and other investors a comprehensive, unbiased barometer to compare their performance against the genuine microcap marketplace of stocks

Amerigon President and CEO Dan Coker said, "Being included in the Russell index is an important acknowledgment of the value we are creating at Amerigon. We believe inclusion in this index will help increase our visibility among investors and contribute to our efforts to increase shareholder value."

The Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. More than $2.5 trillion in assets currently are benchmarked to them. Investment managers who oversee these funds purchase shares of member stocks according to that company's weighting in the particular index.

Companies in the Russell Microcap were ranked as of May 31, 2005 by total market capitalization and weighted based on free-float adjustment, an integral aspect of Russell index methodology. Free-float adjustment means stocks are weighted by their available market capitalization which is calculated by multiplying the primary closing price by the available shares.

About Russell

Russell Investment Group, a global leader in multi-manager investment services, provides investment products and services in more than 39 countries. Russell manages more than $135 billion in assets and advises clients worldwide representing $2.3 trillion. Founded in 1936, Russell is a subsidiary of Northwestern Mutual and is headquartered in Tacoma, Wash., with additional offices in New York, Toronto, London, Paris, Singapore, Sydney, Auckland and Tokyo. For more information, go to www.russell.com.

About Amerigon

Amerigon designs, develops and markets its proprietary Climate Control Seat(TM) (CCS(TM)) products for sale to automotive and truck original equipment manufacturers (OEMs). CCS enhances individual driver and passenger comfort in virtually all climatic conditions by providing cooling and heating to seat occupants, as desired, through an active thermoelectric-based temperature management system. Amerigon's subsidiary, BSST, is developing products using its proprietary, high-efficiency thermoelectric devices (TED). It has development contracts with industry leading partners to expand the market for TED-based automotive and non-automotive products. Amerigon maintains sales and technical support centers in Los Angeles, Detroit, Japan, Germany and England.

Certain matters discussed in this release are forward-looking statements that involve risks and uncertainties, and actual results may be different. Important factors that could cause the Company's actual results to differ materially from its expectations in this release are risks that sales may not significantly increase, necessary additional financing may be unavailable, new competitors may arise and adverse conditions in the automotive industry may negatively affect its results. The liquidity and trading price of its common stock may be negatively affected by these and other factors. Please also refer to the Amerigon's Securities and Exchange Commission filings and reports, including but not limited to its Form 10-QSB for the period ending March 31, 2005 and its Form 10-K for the year ended December 31, 2004.