2003 Thomas Saf-T-Liner Fuel and Emissions Systems

Essential Fuel and Emissions Systems for 2003 Thomas Saf-T-Liners

Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86965)

Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System

from

$89.99
Carquest Premium Fuel/Water Separator Filters remove water and other impurities from the fuel before it reaches your engine fuel system. These filters effectively separate water from the fuel, preventing corrosion and damage to fuel injectors, pumps and other critical engine components. By keeping the fuel clean and water-free, these filters help ensure optimal combustion, improve engine efficiency, and reduce emissions. Carquest Premium Fuel/Water Separator Filters are designed to meet or exceed the performance requirements of the Original Equipment Manufacturer (OEM).

Product Features:
  • Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
  • Made in USA
  • Includes Sensor Port Thread: M14 x 2.0
  • CAUTION: Furnished D-Ring must be installed on post for seal.
See More

Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86412)

Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System

from

$86.99
Carquest Premium Fuel/Water Separator Filters remove water and other impurities from the fuel before it reaches your engine fuel system. These filters effectively separate water from the fuel, preventing corrosion and damage to fuel injectors, pumps and other critical engine components. By keeping the fuel clean and water-free, these filters help ensure optimal combustion, improve engine efficiency, and reduce emissions. Carquest Premium Fuel/Water Separator Filters are designed to meet or exceed the performance requirements of the Original Equipment Manufacturer (OEM).

Product Features:
  • Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
  • Application engineered media which aids in stripping water in diesel fuels
  • Patent pending drain, metal end caps, which hold media in place
  • Rust resistant can, ensuring no leakage from inside
  • Made in USA
  • Includes Integral Post Seal. Sensor Port Thread: 1/2-20
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Dorman – HD Solutions – EGR Cooler V-Band Clamp (Part No.904-5154)

EGR Cooler V-Band Clamp

from

$65.99
This exhaust gas recirculation (EGR) cooler clamp is designed to match the fit of the original clamp on specified vehicles and is recommended for replacement during EGR cooler service. It is engineered from stainless steel for reliable service life.

Product Features:
  • Direct replacement – this exhaust gas recirculation (EGR) cooler clamp is designed to match the fit of the original clamp and is recommended for replacement during EGR cooler service
  • Ideal solution – engineered from stainless steel to withstand extreme heat and to resist corrosion
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Delphi – Fuel Injector (Part No.EX634763)

Fuel Injector

from

$735.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.

Product Features:
  • 100% O Ring replacement
  • All Delphi injectors are tested utilizing OE methodologies
  • Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
  • No internal seal rings equals minimized leakage
  • Recessed fuel exit minimizing possible plugging
  • Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
  • Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
See More

Delphi – Fuel Injector (Part No.EX639349)

Fuel Injector

from

$359.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.

Product Features:
  • 100% O Ring replacement
  • All Delphi injectors are tested utilizing OE methodologies
  • Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
  • No internal seal rings equals minimized leakage
  • Recessed fuel exit minimizing possible plugging
  • Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
  • Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
See More

Delphi – Fuel Injector (Part No.EX634762)

Fuel Injector

from

$724.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.

Product Features:
  • 100% O Ring replacement
  • All Delphi injectors are tested utilizing OE methodologies
  • Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
  • No internal seal rings equals minimized leakage
  • Recessed fuel exit minimizing possible plugging
  • Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
  • Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
See More

Delphi – Fuel Injector (Part No.EX634761)

Fuel Injector

from

$700.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.

Product Features:
  • 100% O Ring replacement
  • All Delphi injectors are tested utilizing OE methodologies
  • Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
  • No internal seal rings equals minimized leakage
  • Recessed fuel exit minimizing possible plugging
  • Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
  • Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
See More

Upgrade your 2003 Thomas Saf-T-Liner with Top-Quality Fuel and Emissions Systems

When it comes to maintaining or upgrading your 2003 Thomas Saf-T-Liner, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Thomas or enhancing its overall performance, Fuel and Emissions Systems are key to keeping your Saf-T-Liner functioning at its best. At Advance Auto Parts, we offer a wide selection of 3 Fuel and Emissions Systems for the 2003 Thomas Saf-T-Liner, designed to meet your needs without breaking the bank. From Fuel Injector replacements to Fuel Pumps upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Fuel and Emissions Systems for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Fuel and Emissions Systems for your 2003 Thomas Saf-T-Liner at great prices. Our Fuel and Emissions Systems inventory for this model ranges from just $65.99 to $359.99, with an average price of $247.19. Our 3 Fuel and Emissions Systems in stock come from 3 trusted brands, so you’re sure to find the right part for your 2003 Thomas Saf-T-Liner without overspending.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Fuel and Emissions System upgrades. Explore related part types like Batteries and Chargers, Fluids and Chemicals and more to make sure your 2003 Thomas Saf-T-Liner is always ready to roll. We’re committed to providing you with everything you need to keep your Saf-T-Liner in top shape, all in one place. Start shopping confidently below for your 2003 Thomas Saf-T-Liner!

Best-Selling Fuel Injectors for 2003 Thomas Saf-T-Liners

Enhance the driving experience in your Thomas with 1 quality Fuel Injector components, starting at $359.99.

Delphi – Fuel Injector (Part No.EX639349)

Fuel Injector

from

$359.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.

Product Features:
  • 100% O Ring replacement
  • All Delphi injectors are tested utilizing OE methodologies
  • Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
  • No internal seal rings equals minimized leakage
  • Recessed fuel exit minimizing possible plugging
  • Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
  • Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
See More

Most Popular 2003 Thomas Saf-T-Liner Fuel Pumps

Customize your Thomas with 1 Fuel Pumps products like Fuel and Water Separators, all priced under $89.99.

Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86965)

Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System

from

$89.99
Carquest Premium Fuel/Water Separator Filters remove water and other impurities from the fuel before it reaches your engine fuel system. These filters effectively separate water from the fuel, preventing corrosion and damage to fuel injectors, pumps and other critical engine components. By keeping the fuel clean and water-free, these filters help ensure optimal combustion, improve engine efficiency, and reduce emissions. Carquest Premium Fuel/Water Separator Filters are designed to meet or exceed the performance requirements of the Original Equipment Manufacturer (OEM).

Product Features:
  • Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
  • Made in USA
  • Includes Sensor Port Thread: M14 x 2.0
  • CAUTION: Furnished D-Ring must be installed on post for seal.
See More

Top Picks for 2003 Thomas Saf-T-Liner Exhaust Gas Recirculation (EGR) Parts

Upgrade Thomas Saf-T-Liners with top-quality Exhaust Gas Recirculation (EGR) Parts parts, including 1 OEM and aftermarket selections for your 2003 model.

Dorman – HD Solutions – EGR Cooler V-Band Clamp (Part No.904-5154)

EGR Cooler V-Band Clamp

from

$65.99
This exhaust gas recirculation (EGR) cooler clamp is designed to match the fit of the original clamp on specified vehicles and is recommended for replacement during EGR cooler service. It is engineered from stainless steel for reliable service life.

Product Features:
  • Direct replacement – this exhaust gas recirculation (EGR) cooler clamp is designed to match the fit of the original clamp and is recommended for replacement during EGR cooler service
  • Ideal solution – engineered from stainless steel to withstand extreme heat and to resist corrosion
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

FAQs for 2003 Thomas Saf-T-Liner Fuel and Emissions Systems

Which Fuel and Emissions Systems are best-sellers for 2003 Thomas Saf-T-Liners?

Out of 3 Fuel and Emissions Systems that fit 2003 Thomas Saf-T-Liners, the following parts are the top sellers:

What’s the price range for 2003 Thomas Saf-T-Liner Fuel and Emissions Systems?

Fuel and Emissions System prices for the 2003 Thomas Saf-T-Liner start at $65.99 and go up to $359.99 for the most premium parts.

What’s the average price of a Fuel and Emissions System for a 2003 Thomas Saf-T-Liner?

The average price for Fuel and Emissions Systems for the 2003 Thomas Saf-T-Liner is $247.19. Keep in mind the variety of part types within our Fuel and Emissions System category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Fuel and Emissions Systems for other Thomas Saf-T-Liner model years?

Yes, we currently carry Fuel and Emissions Systems for 23 model years of Thomas Saf-T-Liners between 2000 and 2024. Fuel and Emissions Systems are bought most frequently for the following model years: 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, and 2014.

What are the cheapest Fuel and Emissions Systems for my 2003 Thomas Saf-T-Liner?

The cheapest 2003 Thomas Saf-T-Liner Fuel and Emissions Systems we carry in stock are:

What types of Fuel and Emissions Systems do you sell for my 2003 Thomas Saf-T-Liner?

As of 11/2/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 2003 Thomas Saf-T-Liner:

Can I get help with 2003 Thomas Saf-T-Liner Fuel and Emissions System orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Thomas Fuel and Emissions Systems and more.

What is your return policy for Thomas Saf-T-Liner Fuel and Emissions Systems?

Advance Auto Parts keeps returns simple. For new Thomas Saf-T-Liner Fuel and Emissions Systems and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.