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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.

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$749.00 - $749.00
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5510447 Genuine Cummins Diesel Exhaust Fluid Header

Cummins

Product Overview The 5510447 is a genuine Cummins Diesel Exhaust Fluid (DEF) Header designed for Navistar applications utilizing a 15-gallon DEF ta...

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70029009 Genuine JLG DEF Head Unit Assembly

JLG

Product Overview The 70029009 is a genuine JLG DEF Head Unit Assembly designed for SkyTrak telehandlers equipped with Cummins ULS engines. This ass...

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4353387 Genuine Cummins Diesel Exhaust Fluid Header

Cummins

Product Overview The 4353387 is a genuine Cummins Diesel Exhaust Fluid (DEF) Header designed for Navistar applications equipped with a 15-gallon DE...

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5511563 Genuine Cummins Diesel Exhaust Fluid Header

Cummins

Product Overview The 5511563 is a genuine Cummins Diesel Exhaust Fluid (DEF) Header designed for Navistar emissions system applications equipped wi...

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717454 Genuine E-One DEF Diesel Exhaust Fluid Sensor Head

E-One

Product Overview The 717454 is a genuine E-One Diesel Exhaust Fluid (DEF) Control Manifold designed for emissions system applications including D1,...

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714898 Genuine E-One DEF Diesel Exhaust Fluid Sensor Head

E-One

Product Overview The 714898 is a genuine E-One Diesel Exhaust Fluid (DEF) Control Manifold designed for diesel emission system applications. This c...

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22303391 Genuine Volvo NOx Sensor For Mack Volvo D11 D13 D16 Engines

Volvo

Product Overview The 22303391 is a genuine Volvo NOx Sensor designed for Mack and Volvo truck applications equipped with D11, D13, and D16 diesel e...

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3600821 Genuine Capacity DEF Header 40 Micron 18 Inch

Capacity

Product Overview The 3600821 is a genuine Capacity DEF Header designed for diesel exhaust fluid tank applications. This header assembly operates wi...

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2505857C91 Genuine International Brake Booster Cylinder With Motor Kit

International

Product Overview The 2505857C91 is a genuine International Brake Booster Cylinder with Motor Kit designed for International truck brake system appl...

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1669578C94 Genuine International Brake Booster Cylinder With Motor Kit

International

Product Overview The 1669578C94 is a genuine International Brake Booster Cylinder with Motor Kit designed for International truck brake system appl...

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1881385C3 Genuine International EGR Valve For MaxxForce Engines

International

Product Overview The 1881385C3 is a genuine International EGR Valve designed for MaxxForce diesel engine applications. This valve operates within t...

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RP169194 Genuine Temsa Bus DEF Diesel Exhaust Fluid Sensor Head

Temsa Bus

Product Overview The RP169194 is a genuine Temsa Bus DEF Diesel Exhaust Fluid Sensor Head designed for bus and commercial vehicle DEF tank monitori...

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24300154-11 Genuine Stewart & Stevenson DEF Diesel Exhaust Fluid Sensor Head

STEWART & STEVENSON

Product Overview The 24300154-11 is a genuine Stewart & Stevenson DEF Diesel Exhaust Fluid Sensor Head designed for diesel exhaust fluid tank m...

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5913429 Genuine Caterpillar DEF Diesel Exhaust Fluid Sensor Head

Caterpillar

Product Overview The 5913429 is a genuine Caterpillar DEF Diesel Exhaust Fluid Sensor Head designed for diesel exhaust fluid tank monitoring applic...

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5356924 Genuine Caterpillar DEF Diesel Exhaust Fluid Sensor Head

CATERPILLAR

Product Overview The 5356924 is a genuine Caterpillar DEF Diesel Exhaust Fluid Sensor Head designed for diesel exhaust fluid tank monitoring applic...

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$209.00
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$209.00

2871878 Genuine Cummins DEF Doser Injector

Cummins

Product Overview The 2871878 is a genuine Cummins DEF Doser Injector designed for Cummins and Paccar diesel engine applications. This dosing valve ...

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$209.00 - $209.00
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$649.00 - $649.00
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5508583 Genuine Cummins DEF Doser Injector For B6.7 L9 X12 X15 Engines

Cummins

Product Overview The 5508583 is a genuine Cummins DEF Doser Injector designed for B6.7, L9, X12, and X15 engine applications using listed Cummins c...

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05015581AA Genuine Mopar Fuel Filter Housing For ISB ISC QSB5.9 Diesel Engines

Mopar

Product Overview The 05015581AA is a genuine Mopar Fuel Filter Housing designed for ISB, ISC, QSB5.9, B5.9, 6B, 6C, and C8.3 diesel engine applicat...

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