Dorman - OE Solutions Diesel Exhaust Fluid (DEF) Heater P/N:904-643
Keep your diesel emissions system flowing in cold weather with the Dorman - OE Solutions Diesel Exhaust Fluid (DEF) Heater 904-379 (also written 904379). It drops in as a direct-fit replacement for the 2014-2015 Freightliner Sprinter 2500, 2014-2015 Freightliner Sprinter 3500, 2014-2015 Mercedes-Benz Sprinter 2500, and 2014-2015 Mercedes-Benz Sprinter 3500. On these vehicles the factory DEF heater often fails from fluid intrusion; this OE FIX unit modifies the original design to target that failure point and improve reliability.
The DEF heater warms the diesel exhaust fluid so it stays liquid and can be dosed in cold temperatures. If a failed heater is the cause of a DEF system fault on your Sprinter, this part replaces it.
Interchange: F01C600232 · 9064700553
This part cross-references / interchanges with the following part numbers:
What does a DEF heater do?
It warms the diesel exhaust fluid so it stays liquid and can be dosed into the emissions system in cold temperatures, keeping DEF flow available when it freezes.
Will this fit my vehicle?
It is a direct-fit replacement for the 2014-2015 Freightliner Sprinter 2500/3500 and 2014-2015 Mercedes-Benz Sprinter 2500/3500. Check the "Vehicles it fits" section to confirm your vehicle.
How is this different from the factory heater?
This Dorman OE FIX unit modifies the original design to add protection against the fluid intrusion that often causes the factory DEF heater to fail.
What are signs this heater may need replacing?
A DEF system warning or fault, especially in cold weather, can be a sign the heater has failed. Diagnose the cause first, since other components can trigger the same fault.
What numbers does this part interchange with?
It cross-references F01C600232 and 9064700553.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.