Description
U58/9KIT Diesel Urea (DEF) Filter — SCR System Protection
The iFJF U58/9KIT Urea Filter is a direct OEM-quality replacement for Mercedes-Benz and Detroit Diesel Selective Catalytic Reduction (SCR) systems. This critical filter prevents contaminants and crystallized DEF from clogging your SCR injector — a failure that can trigger limp mode and costly dealer repairs.
Key Features
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Direct OEM Replacement: Engineered to match the exact filtration specifications of the factory filter — same micron rating, flow rate, and fitment
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High-Efficiency Media: Multi-layer synthetic filter media captures particles as small as 10 microns including crystallized urea deposits
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Prevents SCR Injector Failure: A clogged DEF injector is a $500+ repair. A clean filter is cheap insurance
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Chemical Resistant: Materials rated for continuous exposure to Diesel Exhaust Fluid (32.5% urea solution)
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Easy Access Installation: Typically located in the DEF tank or pump module — replaceable in 15-30 minutes
Vehicle & Engine Compatibility
| Application |
Engine/Model |
| Mercedes-Benz |
BlueTEC Diesel with OM642, OM651 engines (Sprinter, E-Class, GL-Class, ML-Class) |
| Detroit Diesel |
DD13, DD15, DD16 engines with SCR (2010+) |
| Freightliner |
Cascadia, M2 with Detroit DD13/DD15 |
| Evobus / Setra |
OM 457 LA, OM 906 LA, OM 926 LA |
Cross-Reference Part Numbers
| Brand |
Part Number |
| Mercedes-Benz OEM |
A0001421089, A 000 142 10 89 |
| Detroit Diesel |
2265672 |
| Freightliner |
2655824, 1421089 |
| Aftermarket |
UF106, 4388378 |
Symptoms of a Clogged DEF Filter
- Check engine light with SCR-related fault codes (P20E8, P20E9, P204F)
- Reduced engine power / limp mode
- "DEF System Fault" or "Incorrect DEF Fluid" warning on dash
- Failed emissions test
- Poor DEF consumption (injector not spraying properly)
Installation & Maintenance
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Replacement Interval: Every 100,000–150,000 miles or when SCR-related codes appear
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DEF Quality Matters: Always use ISO 22241 certified DEF fluid. Contaminated or expired DEF accelerates filter clogging
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Professional Tip: When replacing the filter, also inspect the DEF injector tip for crystallization — clean with warm water if needed
FAQ
Q: Will this fit a 2014 Mercedes Sprinter 2500 BlueTEC?
A: Yes. The U58/9KIT is compatible with Sprinter vans equipped with the OM642 or OM651 BlueTEC diesel engine and SCR system.
Q: How do I know if my DEF filter needs replacement?
A: Common signs include SCR-related check engine codes (P20E8, P204F), reduced power mode, or DEF system warning messages. Many shops recommend replacement at 100,000–150,000 miles as preventive maintenance.
Q: Can I clean the existing filter instead of replacing it?
A: No. DEF filters are not serviceable — the media becomes saturated with crystallized urea and cannot be effectively cleaned. Replacement is required.
Q: Is this compatible with Detroit DD15 engines?
A: Yes. This filter fits Detroit DD13, DD15, and DD16 engines equipped with SCR aftertreatment systems (2010 and newer).
Q: Will replacing this filter clear my check engine light?
A: After replacement, you may need to clear the fault codes with an OBD-II scanner. The light should stay off if the filter was the root cause. If codes return, the DEF injector or pump may also need attention.
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