NHTSA Complaint #11704117 — 2025 INTERNATIONAL MV

The serpentine belt system keeps on eating belts. This unit needs a 4th belt with only 8900 miles. Its had many trips to the dealer under warranty and they refuse to fix the Root Cause of the belts going bad. The serpentine belt system controls the ac compressor, water pump, cooling fan and alternator. When belt failure occurs multiple truck operating systems simultaneously go down. The belt will start squeeking then eventually will stop charging. The dealership has replaced the belt tensioner and the serpentine belt twice. Its a design flaw, there is an engineering issue with either the belt tensioner, idlers or pulley alignment. The chassis upfitter was also complaining of multiple brand new units experiencing excessive belt squeeling that will in short time lead to failure. The problem is known about at the dealer, it is very easily reproduced as belts average lifespan is about 2,000 miles. This is a dangerous condition as it can disable multiple truck systems in the event of belt failure. No warning lamps.