Description
Diesel Urea (DEF) Filter — U58/9KIT
The iFJF U58/9KIT urea filter is a direct OEM-quality replacement for Mercedes-Benz and Detroit Diesel SCR (Selective Catalytic Reduction) systems. This critical filter protects your diesel engine's emission control system by removing debris and crystallized urea particles from the DEF fluid before it reaches the dosing injector. A clogged or failed urea filter leads to SCR system faults, derate, and costly repairs.
Key Features
-
Direct OEM Replacement: Exact fit for Mercedes-Benz part A0001421089, 2265672, 2655824, 1421089, UF106
-
High-Efficiency Filtration: Captures crystallized urea particles and debris down to 10 microns
-
Corrosion-Resistant Materials: Stainless steel mesh and urea-compatible polymer construction
-
Prevents SCR Failure: Clean DEF fluid = longer dosing injector life and reduced DEF pump wear
-
Easy Service: Direct replacement — no modifications needed, typically a 15-minute service
Compatibility Table
| Make |
Engine/Application |
OEM Part |
| Mercedes-Benz |
BlueTEC Diesel (OM642, OM651) |
A0001421089 |
| Detroit Diesel |
DD13, DD15, DD16 (2010+) |
A0001421089 |
| Freightliner |
Cascadia with DD13/DD15 |
A0001421089 |
| Western Star |
4900, 5700XE with DD engines |
A0001421089 |
Cross References
| Brand |
Part Number |
| Mercedes-Benz |
A0001421089, 0001421089 |
| Detroit Diesel |
2265672, 23536524 |
| Freightliner |
2655824 |
| Fleetguard |
UF106 |
Why Choose iFJF U58/9KIT?
-
Prevent Costly Downtime: A failed SCR system triggers engine derate — this $20 filter protects a $5,000+ aftertreatment system
-
ISO Certified: Manufactured to ISO 22241 standards for diesel exhaust fluid handling
-
60%+ Savings: Versus OEM dealer pricing with identical quality and fitment
FAQ
Q: How often should the DEF/urea filter be replaced?
A> Replace every 100,000 miles or every 2 years, whichever comes first. For vocational trucks in dusty environments, replace annually. Always follow your OEM maintenance schedule.
Q: What are signs of a clogged urea filter?
A: Check engine light with SCR-related fault codes (P20E8-P20EE range), reduced engine power/derate mode, DEF quality warnings on dash, or visible contamination in the DEF tank.
Q: Can I clean and reuse this filter?
A: No. Urea filters are single-use items. Attempting to clean with water will damage the filter media — DEF fluid is 67.5% deionized water and the filter materials are designed for urea only.
Q: Does this work with aftermarket DEF fluid brands?
A: Yes. The U58/9KIT is compatible with all ISO 22241-certified DEF fluids regardless of brand (BlueDEF, Peak, Valvoline, etc.).
