Quantum Fuel Systems Technologies Worldwide (QTWW) 10-K 2003 FY Annual report

EXHIBIT 23.1

Consent of Ernst & Young LLP, Independent Auditors

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-96923) pertaining to the Quantum Fuel Systems Technologies Worldwide, Inc., 2002 Stock Incentive Plan of our report dated June 18, 2003, with respect to the financial statements and schedule of Quantum Fuel Systems Technologies Worldwide, Inc. included in the Annual Report (Form 10-K) for the year ended April 30, 2003.

/s/    ERNST & YOUNG LLP

Long Beach, California

July 1, 2003