Service Brakes, Air, Controls, Pedals And Linkages July 18, 2001 NHTSA recall 01V189003 79 units VEHICLE DESCRIPTION: STREETCARS AND TRANSIT BUSES EQUIPPED WITH CERTAIN MERITOR-WABCO BRAKE SYSTEM TWO AND FOUR PORT RELAY VALVES. THE VALVE MAY STICK OPEN WHEN A HIGH-PRESSURE APPLICATION IS RELEASED. Full recall details: the risk and what to do →