Buy 454-9427 - Genuine CAT DEF Module Manifold - wisentpartscenter.com

Description

The Genuine CAT 593-2337 DEF Module Manifold Assembly is a diesel exhaust fluid tank sensor head assembly used in select Caterpillar DEF/SCR aftertreatment systems. This component is used to support DEF pickup, fluid monitoring, and emissions-system operation. Catalog data identifies 593-2337 as a CAT DEF sensor head assembly with integrated level, temperature, and fluid quality/concentration sensors, an engine-coolant-powered heater, serviceable suction filter, and emissions-control function. Correct part matching is important because DEF header assemblies vary by machine model, tank configuration, harness length, sensor configuration, and emissions calibration. Verify fitment by CAT model, serial number, original part number, and CAT SIS/parts information before ordering.

Purpose of the Part

The 593-2337 DEF header assembly monitors DEF level, temperature, and fluid quality while helping draw DEF from the tank for SCR system operation. It also supports DEF heating in cold operating conditions. If the header fails, the ECM may receive incorrect DEF data, which can cause emissions warnings, SCR faults, reduced performance, or derate.

Issue Symptoms / When to Replace

Common signs of a failing CAT 593-2337 DEF module manifold may include:

DEF system warning light or SCR fault

Incorrect DEF level reading

DEF temperature or quality/concentration sensor faults

Machine derate related to aftertreatment system operation

DEF freezing, poor DEF pickup, or flow restriction

Damaged harness, corroded pins, or connector issues

Repeated DEF faults after confirming correct DEF fluid quality

Exact fault codes vary by CAT machine, ECM, and aftertreatment configuration. Diagnose with CAT ET and refer to CAT SIS before replacing the part.

Brand Information

CAT is Caterpillar’s parts brand for equipment, engine, powertrain, hydraulic, and aftertreatment components used across Caterpillar machines and industrial engines. Genuine CAT components are built to match Caterpillar system specifications and service requirements. For DEF header assemblies, OEM fitment is important because level sensing, temperature sensing, DEF quality monitoring, heater function, and ECM communication must match the machine configuration.

Installation Notes

Install 593-2337 only after confirming the original part number and machine serial number. Inspect the DEF tank, suction filter, coolant heater connections, electrical connector, seals, and harness before installation. Follow CAT SIS for torque specifications, DEF handling, coolant routing, leak testing, priming, and final diagnostic verification.

How to Identify an OEM Part

A Genuine CAT 593-2337 DEF module manifold should be verified by the CAT part-number label, original CAT packaging, molded or stamped identification, harness layout, and sensor head configuration. Match the part to the original unit removed from the machine and the part number shown in CAT SIS. Do not rely on visual appearance only, because aftermarket DEF headers may look similar but differ in sensor calibration, harness length, heater configuration, or tank fitment.

Why Buy 593-2337 from Wisent Parts

  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.