Skip to content
Free Standard Shipping on Eligible Orders Over $100 in the Contiguous U.S.
Free Standard Shipping on Eligible Orders Over $100 in the Contiguous U.S.

4099788C91 Genuine International DEF Tank Assembly

P/N: 4099788C91 Manufactured by: International
Original price $375.00 - Original price $375.00
Original price
$375.00
$375.00 - $375.00
Current price $375.00
1 in Stock
Condition: New
We accept:
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
Not Sure Which Part Fits?Our support team is here to help.
+1 (828) 209-8010
Monday – Saturday | 8:00 AM – 8:00 PM (EST)
Fast 2–3 Day Shipping
30-Day Returns
In Stock & Ships Fast
Expert Support Available
2-Year Warranty

At Line Truck Parts LLC, we are committed to providing reliable automotive parts and a transparent customer experience. Eligible parts purchased directly from our website are covered by a 2-Year Limited Warranty, giving you added confidence in your purchase. Learn More

Product Overview

The 4099788C91 is a genuine International 7-gallon blow-molded DEF tank assembly developed to store diesel exhaust fluid for vehicles equipped with selective catalytic reduction systems. It provides a dedicated DEF reservoir that supplies fluid to the SCR dosing system, supporting stable emissions control during normal engine operation.

Product Features

The 4099788C91 DEF tank assembly is manufactured to International factory specifications for diesel exhaust fluid storage and supply.

  • Supports seven-gallon DEF capacity for consistent SCR system fluid management
  • Uses blow-molded tank construction for dependable reservoir strength and fluid containment
  • Maintains required DEF volume for continuous dosing system operation during service
  • Integrates with factory mounting locations and original emissions system configuration
  • Connects to designated DEF supply lines through the specified tank interface
  • Assists proper diesel exhaust fluid circulation within the SCR emissions system

Technical Specifications

Condition New
Part Number 4099788C91
Brand International
Part Type DEF Tank Assembly
Capacity 7 gal
Weight 15.0 lbs


Installation Notes

The 4099788C91 should be installed after confirming the tank mounting points, DEF line routing, hose connections, and sealing areas are clean and correctly aligned before fastening the assembly. After installation, inspect the complete DEF circuit for secure connections, verify there are no leaks, and confirm proper fluid delivery to the SCR dosing system.

Always verify DEF tank capacity, part number, mounting configuration, hose connections, and SCR emissions system requirements before installation.