Navistar, Inc. (Navistar) is recalling certain 2017-2019 International HX severe service diesel trucks equipped with feature code 04091 (dual air brake system) and 04AZY (Antilock Brake System (ABS) with 6 channel Electronic Stability Protection (ESP)). The air supply line to the SR7 roll stability valve may have been improperly routed to the ATR6 brake control valve steer axle delivery port, when it should be connected to the ATR6 brake control valve control port.
During a stability control oversteer event when there are slippery road conditions, the parking brakes may be modulated unintentionally, potentially causing a loss of control and increasing the risk of a crash.
Navistar will notify owners, and dealers will reroute the SR7 roll stability valve supply line to the ATR6 brake control valve control port, free of charge. The recall began on June 12, 2018. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 18504.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.