View 0 Photos View 0 Videos 2004 Cummins B3.9 Engine for a Case 521D Newly Listed $4,400 USD (USED) Cummins B3.9 Warranty: 180 Day Parts Only Assembly#: VERIFY Serial#: VERIFY Horsepower: VERIFY ConditionUsedAssembly NumberVERIFYFits To Make(s)CaseFits To Model(s)521DStock Number26056784 MLS Number14594030CategoryEngines Last Updated9/10/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info