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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

$229.00 - $229.00
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22193672 Genuine Volvo Mack Multi-Purpose Wiring Harness

Volvo

Product Overview The 22193672 is a genuine Volvo/Mack multi-purpose wiring harness designed for MP8 and D13 engine applications used in Volvo VNL m...

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$229.00 - $229.00
$229.00
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$229.00
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10049766 Genuine Blue Bird DEF Multifunction Head Unit

Blue Bird

Product Overview The 10049766 is a genuine Blue Bird DEF multifunction head unit designed for diesel exhaust fluid system applications. Installed w...

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ASP-DM701-1800F766 Genuine Spartan DEF Head Level Sensor

Spartan

Product Overview The ASP-DM701-1800F766 is a genuine Spartan DEF multifunction head unit designed for Blue Bird diesel exhaust fluid system applica...

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ASP4310-6600718 Genuine Spartan DEF Head Level Sensor

Spartan

Product Overview The ASP4310-6600718 is a genuine Spartan DEF multifunction head unit designed for Blue Bird diesel exhaust fluid system applicatio...

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ASP43106600718 Genuine Spartan DEF Head Level Sensor

Spartan

Product Overview The ASP43106600718 is a genuine Spartan DEF multifunction head unit designed for Blue Bird diesel exhaust fluid system application...

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DM7011800F766 Genuine Spartan DEF Head Level Sensor

Spartan

Product Overview The DM7011800F766 is a genuine Spartan DEF multifunction head unit designed for Blue Bird diesel exhaust fluid system applications...

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82-89733-000 Genuine Gillig DEF Control Manifold

Gillig

Product Overview The 82-89733-000 is a genuine Gillig Diesel Exhaust Fluid (DEF) Control Manifold designed for DEF storage and aftertreatment syste...

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3991596C97 Genuine International DEF Wiring Harness

International

Product Overview The 3991596C97 is a genuine International DEF Wiring Harness designed for diesel exhaust fluid system electrical distribution. Thi...

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$599.00 - $599.00
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3991596C94 Genuine International DEF Wiring Harness

International

Product Overview The 3991596C94 is a genuine International DEF Wiring Harness designed for diesel exhaust fluid system electrical integration. This...

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3991596C98 Genuine International DEF Wiring Harness

International

Product Overview The 3991596C98 is a genuine International DEF Wiring Harness designed for diesel exhaust fluid system electrical integration. This...

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$599.00 - $599.00
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1009212003 Genuine E-One DEF Multifunction Head Unit

E-One

Product Overview The 1009212003 is a genuine E-One DEF Multifunction Head Unit designed for compatible diesel exhaust fluid system applications. Th...

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$489.00 - $489.00
$489.00
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$489.00

4928594 Genuine Cummins Humidity Sensor

Cummins

Product Overview The 4928594 is a genuine Cummins Humidity Sensor designed for compatible Cummins engine applications. This humidity sensor measure...

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4921746 Genuine Cummins Humidity Sensor

Cummins

Product Overview The 4921746 is a genuine Cummins Humidity Sensor designed for compatible Cummins engine applications. This humidity sensor measure...

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$489.00 - $489.00
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$489.00

4903479 Genuine Cummins Humidity Sensor

Cummins

Product Overview The 4903479 is a genuine Cummins Humidity Sensor designed for compatible Cummins engine applications. This humidity sensor measure...

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$489.00 - $489.00
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4087989 Genuine Cummins Exhaust Gas Pressure Sensor

Cummins

Product Overview The 4087989 is a genuine Cummins Exhaust Gas Pressure Sensor designed for Cummins ISB 6.7L and ISX engine applications. This press...

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$489.00 - $489.00
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3678912 Genuine Cummins Humidity Sensor

Cummins

Product Overview The 3678912 is a genuine Cummins Humidity Sensor designed for compatible Cummins engine applications. This humidity sensor measure...

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$489.00 - $489.00
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4921747 Genuine Cummins Humidity Sensor

Cummins

Product Overview The 4921747 is a genuine Cummins Humidity Sensor designed for Cummins ISB 6.7L engine applications. This humidity sensor measures ...

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$489.00 - $489.00
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4955125 Genuine Cummins Humidity Sensor For ISB 6.7L

Cummins

Product Overview The 4955125 is a genuine Cummins Humidity Sensor designed for Cummins ISB 6.7L engine applications. This humidity sensor measures ...

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3929939 Genuine Cummins Fuel Control Housing

Cummins

Product Overview The 3929939 is a genuine Cummins Fuel Control Housing designed for compatible Cummins fuel system applications. This fuel control ...

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3930048 Genuine Cummins Fuel Control Housing

Cummins

Product Overview The 3930048 is a genuine Cummins Fuel Control Housing designed for compatible Cummins fuel system applications. This fuel control ...

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3934703 Genuine Cummins Fuel Control Housing

Cummins

Product Overview The 3934703 is a genuine Cummins Fuel Control Housing designed for QSL engine applications. This fuel control housing operates wit...

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$249.00 - $249.00
$249.00
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0030917401 Genuine Detroit Diesel Fuel Pump For MBE900 6.3L EPA07

Detroit Diesel

Product Overview The 0030917401 is a genuine Detroit Diesel fuel pump designed for MBE900 6.3L EPA07 engine applications. This fuel pump operates w...

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$249.00 - $249.00
$249.00
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$749.00 - $749.00
$749.00
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$749.00

5511565 Genuine Cummins Diesel Exhaust Fluid Header

Cummins

Product Overview The 5511565 is a genuine Cummins diesel exhaust fluid header designed for Navistar DEF tank applications. This diesel exhaust f...

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$749.00 - $749.00
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$475.00
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$475.00

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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$475.00 - $475.00
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