2018 MCI J4500 Recall: Primary air line was incorrectly hooked to the secondary air pressure…
NHTSA campaign 17V687000 · Service Brakes, Air · filed Oct 30, 2017 · verified Jul 30, 2026
The defect
Motor Coach Industries (MCI) is recalling certain 2018 MCI J4500 buses. The primary air line was incorrectly hooked to the secondary air pressure gauge and the secondary air line was hooked to the primary air pressure gauge. As such, these buses fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems."
The risk
The incorrect air pressure readings may increase the risk of a crash by delaying the driver's reaction to addressing the low air condition.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
MCI will notify owners, and dealers will inspect the air lines for proper connection, repairing them as necessary, free of charge. The recall began on December 12, 2017. Owners may contact MCI customer service at 1-800-241-29471. MCI's number for this recall is SB 455.
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.
Affected vehicles
Related recalls
More MCI J4500 recalls
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Other campaigns involving MCI vehicles
Source: NHTSA recall database, campaign 17V687000 (manufacturer number SB 455). Data last verified Jul 30, 2026.