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Fuel & Emission Parts

Genuine OEM Fuel & Emission Parts

A failing humidity or NOx sensor, a clogged fuel control housing, or a DEF header that's lost calibration can all trigger the same result — a derate, a fault code, and a diesel engine that won't run within emissions compliance. Because these components work together to manage combustion, exhaust treatment, and fluid delivery, a wrong or generic replacement often means the same fault code returns within weeks. That's why every part in this collection is genuine OEM, matched to the manufacturer's original part number.

What's in this category

This collection covers the core fuel and emission system components for heavy-duty diesel engines, including:

  • Humidity & exhaust gas pressure sensors — feed combustion and emissions data to the ECM
  • NOx sensors — monitor nitrogen oxide levels for SCR system compliance
  • Fuel control housings & fuel filter housings — regulate and filter fuel delivery to the engine
  • Fuel pumps — deliver fuel at the pressure your engine needs to run correctly
  • DEF headers, multifunction head units & tank jumper harnesses — manage diesel exhaust fluid level, quality, and delivery
  • Diesel exhaust fluid headers — tank-mounted assemblies for DEF systems
  • Brake booster cylinders with motor kits — hydraulic power assist for heavy-duty braking

Brands we cover

This collection includes genuine OEM parts for Cummins, International/Navistar, Mopar, Detroit Diesel, Volvo, Mack, Capacity, Hyundai, JLG and more.

Why order your fuel & emission parts here

  • Genuine OEM only — every part is matched to the manufacturer's original part number, not a generic equivalent
  • Built for accurate fitment — listings include the exact OEM number so you can verify the right part before you buy
  • Fast turnaround — ships quickly to minimize downtime and keep your engine in compliance

FAQ

What does a humidity sensor do? It measures intake air humidity so the ECM can adjust fuel and emissions calculations. Failure can trigger fault codes or unnecessary derates.

NOx sensor vs. DEF sensor? A NOx sensor checks exhaust nitrogen oxide levels to confirm the SCR system is working; a DEF sensor monitors DEF level and quality in the tank.

Signs of a failing fuel pump or housing? Hard starting, rough idle, power loss under load, stalling, or a fuel-related check engine light.

Genuine OEM or aftermarket? All parts here are genuine OEM — no generic substitutes.

How do I find the right part? Match the OEM number on your old component or check your service manual, then search that number above.

Filters

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3973914 Genuine Mopar Fuel Filter Housing

Mopar

Product Overview The 3973914 is a genuine Mopar fuel filter housing designed for Cummins 6B, ISB, QSB5.9, B5.9, 6C, ISC, and C8.3 Diesel engine app...

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1009212-003 Genuine E-One DEF Multifunction Head Unit

E-One

Product Overview The 1009212-003 is a genuine E-One DEF Multifunction Head Unit designed for diesel exhaust fluid tank applications. This DEF multi...

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46850452 Genuine Bobcat DEF Multifunction Head Unit

Bobcat

Product Overview The 46850452 is a genuine Bobcat DEF Multifunction Head Unit designed for diesel exhaust fluid tank applications. This DEF multifu...

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46699844 Genuine Bobcat DEF Multifunction Head Unit

Bobcat

Product Overview The 46699844 is a genuine Bobcat DEF Multifunction Head Unit designed for diesel exhaust fluid tank applications. This DEF multifu...

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103819017 Genuine Ferrara Fire Apparatus DEF Multifunction Head Unit

Ferrara Fire Apparatus

Product Overview The 103819017 is a genuine Ferrara Fire Apparatus DEF Multifunction Head Unit designed for diesel exhaust fluid tank applications....

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911181 Genuine Capacity DEF Multifunction Head Unit

Capacity

Product Overview The 911181 is a genuine Capacity DEF Multifunction Head Unit designed for diesel exhaust fluid tank applications. This DEF multifu...

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T168098 Genuine Terex Lift DEF Multifunction Head Unit

Terex Lift

Product Overview The T168098 is a genuine Terex Lift DEF Multifunction Head Unit designed for diesel exhaust fluid tank applications. This DEF mult...

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37344 Genuine Terex Lift DEF Multifunction Head Unit

TEREX LIFT

Product Overview The 37344 is a genuine Terex Lift DEF Multifunction Head Unit designed for diesel exhaust fluid tank applications. This DEF multif...

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04-31353-003 Genuine Freightliner Header-SS DEF

Freightliner

Product Overview The 04-31353-003 is a genuine Freightliner Header-SS DEF designed for diesel exhaust fluid system applications. This header operat...

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$589.00 - $589.00
$589.00
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$589.00

1832311PE Genuine Paccar Doser Injection Module For Kenworth Peterbilt MX 12.9L

Paccar

Product Overview The 1832311PE is a genuine Paccar doser injection module designed for Kenworth and Peterbilt vehicles equipped with MX 12.9L engin...

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2610045C1 Genuine International Multifunction DEF Head Unit 12.4 Inch

International

Product Overview The 2610045C1 is a genuine International multifunction DEF head unit designed for diesel exhaust fluid system applications. This a...

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4378045 Genuine Cummins Diesel Exhaust Fluid Header

Cummins

Product Overview The 4378045 is a genuine Cummins Diesel Exhaust Fluid (DEF) Header designed for Navistar applications utilizing a 15-gallon DEF ta...

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462-3242 Genuine CAT DEF Multifunction Head Unit

CAT

Product Overview The 462-3242 is a genuine CAT DEF Multifunction Head Unit designed for diesel exhaust fluid system applications. This unit operate...

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$1,149.00 - $1,149.00
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$289.00 - $289.00
$289.00
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$289.00

5010870R91 Genuine International Low Pressure Fuel Pump For DT466 MaxxForce

International

Product Overview The 5010870R91 is a genuine International low pressure fuel pump designed for DT466, DT466E, DT530, DT530E, DT570, HT530, HT570, M...

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4378048 Genuine Cummins DEF Tank Header Sensor Assembly

Cummins

Product Overview The 4378048 is a genuine Cummins DEF Tank Header designed for diesel exhaust fluid tank and SCR emissions system applications. Thi...

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2888173 Genuine Cummins Doser Injector

Cummins

Product Overview The 2888173 is a genuine Cummins Doser Injector designed for XPI fuel system applications equipped with 6.7L diesel engines. This ...

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2430015411 Genuine Stewart & Stevenson DEF Diesel Exhaust Fluid Sensor Head

STEWART & STEVENSON

Product Overview The 2430015411 is a genuine Stewart & Stevenson DEF Diesel Exhaust Fluid Sensor Head designed for SCR emissions system applica...

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535-6924 Genuine Caterpillar DEF Diesel Exhaust Fluid Sensor Head

CATERPILLAR

Product Overview The 535-6924 is a genuine Caterpillar DEF Diesel Exhaust Fluid Sensor Head designed for diesel exhaust fluid tank monitoring syste...

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$799.00 - $799.00
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4033171C99 Genuine International DEF Tank Jumper Harness

International

Product Overview The 4033171C99 is a genuine International DEF Tank Jumper Harness designed for Navistar and International applications. This harne...

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05015581 Genuine Mopar Fuel Filter Housing For QSB 5.9L ISC ISB Engines

Mopar

Product Overview The 05015581 is a genuine Mopar Fuel Filter Housing designed for QSB 5.9L, ISB, ISC, B5.9, 6B, 6C, and C8.3 diesel engine applicat...

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$475.00 - $475.00
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3964851 Genuine Mopar Fuel Filter Housing For QSB 5.9L ISC ISB Engines

Mopar

Product Overview The 3964851 is a genuine Mopar Fuel Filter Housing designed for QSB 5.9L, ISB, ISC, B5.9, 6B, 6C, and C8.3 diesel engine applicati...

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1DFQ70300 Genuine Hyundai DEF Header Sensor

Hyundai

Product Overview The 1DFQ70300 is a genuine Hyundai DEF header sensor developed for diesel exhaust fluid tank system applications. This component o...

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909934 Genuine International DEF Multifunction Header

International

Product Overview The 909934 is a genuine International DEF Multifunction Header designed for motorhome applications equipped with a 10-gallon diese...

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1DFQ-70300 Genuine Hyundai DEF Header Sensor

Hyundai

Product Overview The 1DFQ-70300 is a genuine Hyundai DEF Header Sensor designed for diesel exhaust fluid tank applications. This component serves a...

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$749.00 - $749.00
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