Dorman 996-1004 Engine Oil Separator

In stock
SKU: 591|9961004
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Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price $348.80
Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.

Product details

  • SKU 591|9961004
  • Barcode #N/A

Product Description

This crankcase breather repair kit directly replaces the crankcase breather element on specific vehicles. It features the exact fit, function and performance as the factory part, and can potentially save you time and money if the OEM dealership only has the complete breather assembly, forcing you to also buy the lower aluminum housing, even if that isn't the failure point. The separator can fail on its own, either by clogging, cracking, or having a separator bearing fail from age and wear, which is indicated by noise and vibration. Excessive oil mist from the gas outlet can also be a failed separator symptom. When any of those failures occur, you can replace the separator with this kit, reducing part costs and install time by not having to replace the lower housing on the engine block.

  • OEM quality - this replacement crankcase breather element matches the fit, function and performance of the original oil separator on specific vehicles for a trustworthy fix
  • Saves time and money - many dealerships only stock this oil separator as part of the complete assembly with the lower housing; replacing only the failed element saves money and installation time
  • Effective design - engineered and manufactured to efficiently and effectively filter blow-by gases, clearing DTCs, reducing contaminants, and restoring proper engine function
  • Install tip - to ensure a tight, effective connection, be sure to clean the sealing surfaces on the lower housing where the seals are seated, before installing the new separator

Detailed Applications

Year Make Model Configuration Positions Application Notes
2023 Freightliner 114SD Engine Desg. DD13; EngineMfr Detroit Diesel
2023 Freightliner Cascadia Engine Desg. DD13; EngineMfr Detroit Diesel
2023 Freightliner Cascadia Engine Desg. DD15; EngineMfr Detroit Diesel
2023 Freightliner M2 112 Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Freightliner 114SD Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Freightliner 122SD Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Freightliner 122SD Engine Desg. DD15; EngineMfr Detroit Diesel
2022 Freightliner 122SD Engine Desg. DD16; EngineMfr Detroit Diesel
2022 Freightliner Cascadia Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Freightliner Cascadia Engine Desg. DD15; EngineMfr Detroit Diesel
2022 Freightliner Cascadia Engine Desg. DD16; EngineMfr Detroit Diesel
2022 Freightliner M2 112 Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Freightliner Sport Chassis Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 4700SB Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 4700SF Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 4800SB Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 4800SF Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 4900EX Engine Desg. DD15; EngineMfr Detroit Diesel
2022 Western Star 4900EX Engine Desg. DD16; EngineMfr Detroit Diesel
2022 Western Star 4900FA Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 4900FA Engine Desg. DD15; EngineMfr Detroit Diesel
2022 Western Star 4900FA Engine Desg. DD16; EngineMfr Detroit Diesel
2022 Western Star 4900SA Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 4900SA Engine Desg. DD15; EngineMfr Detroit Diesel
2022 Western Star 4900SA Engine Desg. DD16; EngineMfr Detroit Diesel
2022 Western Star 5700XE Engine Desg. DD13; EngineMfr Detroit Diesel
2022 Western Star 5700XE Engine Desg. DD15; EngineMfr Detroit Diesel
2022 Western Star 5700XE Engine Desg. DD16; EngineMfr Detroit Diesel
2022 Western Star 6900XD Engine Desg. DD16; EngineMfr Detroit Diesel
2021 Freightliner 114SD Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Freightliner 122SD Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Freightliner 122SD Engine Desg. DD15; EngineMfr Detroit Diesel
2021 Freightliner 122SD Engine Desg. DD16; EngineMfr Detroit Diesel
2021 Freightliner Cascadia Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Freightliner Cascadia Engine Desg. DD15; EngineMfr Detroit Diesel
2021 Freightliner Cascadia Engine Desg. DD16; EngineMfr Detroit Diesel
2021 Freightliner M2 112 Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Freightliner Sport Chassis Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Motor Coach Industries J4500 Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Van Hool Commuter Coach CX Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Western Star 4700SB Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Western Star 4700SF Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Western Star 4800SB Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Western Star 4800SF Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Western Star 4900EX Engine Desg. DD15; EngineMfr Detroit Diesel
2021 Western Star 4900EX Engine Desg. DD16; EngineMfr Detroit Diesel
2021 Western Star 4900FA Engine Desg. DD13; EngineMfr Detroit Diesel
2021 Western Star 4900FA Engine Desg. DD15; EngineMfr Detroit Diesel
2021 Western Star 4900FA Engine Desg. DD16; EngineMfr Detroit Diesel
2021 Western Star 4900SA Engine Desg. DD13; EngineMfr Detroit Diesel
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Product Specifications

Grade Type: Regular
Package Contents: 1 Engine Crankcase Breather Element; 1 Gasket
Port Length: 1.35 in
Port Outside Diameter: 1.424 in
Port Quantity: 1
Port Type: Flanged
Port Width: 0.25 in

OE Numbers

DIRECT OE CROSS
A4720105062 DAIMLER
A4720105262 DETROIT DIESEL
A4720106262 DAIMLER
A4720106462 DAIMLER
A4720106662 DAIMLER
A4720106862 DAIMLER