Hey International truck owners - if your coolant reservoir is cracked or leaking, this Dorman replacement is exactly what you need! The 603-5105 model is engineered to match the original part's fit and function perfectly, so installation is straightforward without any modifications needed. Built from quality materials that can handle the intense underhood heat and constant engine vibration that comes with heavy truck use. This thing is built to last through miles of rough road. Now, super important - this fits specific International models including the 5900 (2003-2009), 9900i (2003-2018), and ProStar (2007-2020), but you absolutely should double-check your exact vehicle trim using the garage tool before ordering. Dorman brings over 100 years of automotive aftermarket experience to this part, so you know you're getting something reliable that won't let you down on the road. No more worrying about coolant leaks or overheating issues from a failing reservoir. Whether you're a professional trucker or managing a fleet, having a properly functioning coolant system is crucial for those long hauls. This direct replacement gets you back on the road with confidence and keeps your engine running cool and efficient.
Free 30-day returns 
Free 30-day returns
