454-9427 | Genuine CAT® Diesel Exhaust Fluid (DEF) Sensor Head Assembly

SKU: 454-9427 MPN: 454-9427

Precise fluid sensing for consistent emissions control is provided by this New Genuine Diesel Exhaust Fluid Sensor Head Assembly from Caterpillar. Part number: 454-9427. Supporting proper DEF system feedback across the vehicle.

$849.00
No Core Charge
8 in stock, ready to ship

Pickup available at Warehouse - Howard st 7092 ste F

Usually ready in 24 hours

Need it fast? We offer overnight shipping

Contact us to check if overnight next-day delivery is available for your order - PN: 454-9427

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Product Description

Product Name Diesel Exhaust Fluid (DEF) Sensor Head Assembly Product Name Diesel Exhaust Fluid (DEF) Sensor Head Assembly
Condition New Condition New
Brand Caterpillar® Brand Caterpillar®
Part Number 454-9427 Part Number 454-9427
Cross Reference 4549427 Cross Reference 4549427
Engine Compatibility
Machine / Industrial C4.4 Machine / Industrial C4.4
Vehicle Compatibility
Track-Type Tractors D4, D6K2 XL, D6K2 LGP Track-Type Tractors D4, D6K2 XL, D6K2 LGP
Asphalt Pavers AP500F, AP555F, AP600F, AP655F Asphalt Pavers AP500F, AP555F, AP600F, AP655F
Pneumatic Compactors CW-34 series Pneumatic Compactors CW-34 series
Soil Compactors CP11–CP16 series, CS11–CS19 series Soil Compactors CP11–CP16 series, CS11–CS19 series
Vibratory Compactors CS-54B–CS-78B series, CP-54B–CP-74B series Vibratory Compactors CS-54B–CS-78B series, CP-54B–CP-74B series
Other Compactors CCS9 Other Compactors CCS9
Telehandlers TL1055D, TL1255D Telehandlers TL1055D, TL1255D
Specifications
DEF Header Height (IN) 11 DEF Header Height (IN) 11
DEF Return Fitting Dia. (IN) 5/16 SAE J2044 DEF Return Fitting Dia. (IN) 5/16 SAE J2044
Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead
Tank Interface 4.05 Dia. Bore Seal Tank Interface 4.05 Dia. Bore Seal
Electrical Connector Deutsch DT4 (STD) Electrical Connector Deutsch DT4 (STD)
Sensor Type Digital (canbus) Sensor Type Digital (canbus)
DEF Suction Fitting Dia. (IN) 3/8 SAE J2044 DEF Suction Fitting Dia. (IN) 3/8 SAE J2044
Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead
In-Tank Filter 40µ In-Tank Filter 40µ

Useful Information

Description and Purpose:

With Part number: 454-9427 as the key identifier, this Genuine Caterpillar DEF Sensor Head Assembly is supplied in new condition and serves as the main interface between the DEF tank and the SCR system. The assembly integrates a digital canbus sensor, in-tank 40-micron filtration, and SAE J2044 fittings to ensure accurate DEF level, temperature, and quality monitoring. Designed for C4.4 machine and industrial engines. Cross reference: 4549427

Why Replacement is Important:

A malfunctioning DEF sensor head can trigger fault codes, incorrect DEF readings, or derate conditions.

Impact on Vehicle Performance:

Correct operation of the DEF sensor head maintains consistent emissions control, stable engine operation, and uninterrupted SCR performance.

Manufacturer Information:

Caterpillar® is a global leader in heavy equipment manufacturing, producing integrated emissions components designed to meet durability standards, system compatibility requirements, and long-term operational demands across construction and industrial applications.

Tags & Category: DEF Sensor Head Assembly, Diesel Exhaust Fluid Sensor, SCR System Component, Emission Control System, Exhaust Aftertreatment Part, Diesel Emissions Component, DEF System Part, Heavy Duty Engine Component, Commercial Vehicle Emissions Part, Truck Emission System, Aftertreatment System Component

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 454-9427