This standard specifies labeling and performance requirements for motor vehicle brake hose@ brake hose assemblies@ and brake hose end fittings. Purpose. The purpose of this standard is to reduce deaths and injuries occurring as a result of brake system failure from pressure or vacuum loss due to hose or hose assembly rupture. Application. This standard applies to passenger cars@ multipurpose passenger vehicles@ trucks@ buses@ trailers@ and motorcycles@ and to hydraulic@ air@ and vacuum brake hose@ brake hose assemblies@ and brake hose end fittings for use in those vehicles.