A bill to amend the Urban Mass Transportation Act of 1964 to require manufacturers of buses which are acquired with assistance under that Act to guarantee the performance of those buses for 12 years.

Amends the Urban Mass Transportation Act of 1964 to prohibit Federal financial assistance for bus acquisition unless the bus manufacturer: (1) provides a written guarantee that the bus will perform for a period of 12 years under proper maintenance and operation; and (2) furnishes security in an amount sufficient to satisfy the manufacturer's liability if the guarantee requirements are not met.

Imposes liability upon the bus manufacturer for a portion of the Federal share of the bus acquisition cost if a bus acquired with financial assistance does not meet the guarantee requirements.