1999 Freightliner MT45 Fuel and Emissions Systems
Find Your Specific 1999 Freightliner MT45 Fuel and Emissions Systems
Below you will find various in-demand Freightliner Fuel and Emissions Systems, components and accessories for your 1999 MT45. Advance Auto Parts has popular MT45 parts like Diesel Emission Parts, Fuel Injectors, Fuel Pumps and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other MT45 model years including
2013,
2014,
2015,
2016,
2017,
2018,
2019,
2021,
2022 and more. Select a category of 1999 Freightliner MT45 Fuel and Emissions Systems below and start saving instantly.
Popular 1999 Freightliner MT45 Fuel and Emissions Systems Categories
Essential Fuel and Emissions Systems for 1999 Freightliner MT45s
Carquest Premium – Diesel Exhaust Fluid Filter for SCR Systems (Part No.96679)
from
$108.99
Carquest Premium Diesel Exhaust Fluid (DEF) Filters help reduce harmful emissions and improve air quality. DEF filters remove impurities such as dirt, debris, and particulates from the diesel exhaust fluid before entering your vehicle’s emission control system. These filters allow clean fluid to break down harmful nitrogen oxide (NOx) gases produced during diesel combustion. By ensuring proper DEF flow and helping protect system components, DEF filters help diesel engines meet strict emission standards. Carquest Premium Diesel Exhaust Fluid (DEF) Filters are designed to meet or exceed the performance requirements of the Original Equipment Manufacturer (OEM).
Product Features:
See More
Product Features:
- Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
- Contains Plug and Filter Removal Tool
Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86408)
from
$53.99
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:
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Product Features:
- Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
- Contains Sensor Port Thread: 1 1/4-10;Integral Post Seal
- Includes Integral Post Seal. Sensor Port Thread: 1 1/4-10
- CAUTION: Furnished O-Ring must be installed on post for seal.
Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86604)
from
$83.99
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:
See More
Product Features:
- CAUTION: Furnished O-Ring must be installed on post for seal. For use with Deutz square sensor. NOT Interchangeable with 86422.
- Sensor Port Thread: M14 x 2.0; Standpipe
- Includes Standpipe. Sensor Port Thread: M14 x 2.0
- CAUTION: Furnished O-Ring must be installed on post for seal. For use with Deutz square sensor.
Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86651XE)
from
$45.99
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:
See More
Product Features:
- Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
- Made in USA
Delphi – Fuel Injector (Part No.EX631063)
from
$145.99
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:
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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
Upgrade your 1999 Freightliner MT45 with Top-Quality Fuel and Emissions Systems
When it comes to maintaining or upgrading your 1999 Freightliner MT45, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Freightliner or enhancing its overall performance, Fuel and Emissions Systems are key to keeping your MT45 functioning at its best. At Advance Auto Parts, we offer a wide selection of 5 Fuel and Emissions Systems for the 1999 Freightliner MT45, designed to meet your needs without breaking the bank.
From
Diesel Emission Part
replacements to
Fuel Injectors
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 1999 Freightliner MT45 at great prices.
Our Fuel and Emissions Systems inventory for this model
ranges from just $45.99 to $145.99, with
an average price of $87.79.
Our 5 Fuel and Emissions Systems in stock come from 2 trusted brands, so you’re sure to find the right part for your 1999 Freightliner MT45 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 1999 Freightliner MT45 is always ready to roll. We’re committed to providing you with everything you need to keep your MT45 in top shape, all in one place.
Start shopping confidently below for your 1999 Freightliner MT45!
Best-Selling Diesel Emission Parts for 1999 Freightliner MT45s
Enhance the driving experience in your Freightliner with 1 quality Diesel Emission Part components, starting at $108.99.
Carquest Premium – Diesel Exhaust Fluid Filter for SCR Systems (Part No.96679)
from
$108.99
Carquest Premium Diesel Exhaust Fluid (DEF) Filters help reduce harmful emissions and improve air quality. DEF filters remove impurities such as dirt, debris, and particulates from the diesel exhaust fluid before entering your vehicle’s emission control system. These filters allow clean fluid to break down harmful nitrogen oxide (NOx) gases produced during diesel combustion. By ensuring proper DEF flow and helping protect system components, DEF filters help diesel engines meet strict emission standards. Carquest Premium Diesel Exhaust Fluid (DEF) Filters are designed to meet or exceed the performance requirements of the Original Equipment Manufacturer (OEM).
Product Features:
See More
Product Features:
- Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
- Contains Plug and Filter Removal Tool
Most Popular 1999 Freightliner MT45 Fuel Injectors
Customize your Freightliner with 1 Fuel Injectors products
like Fuel Injectors, all
priced under $145.99.
Delphi – Fuel Injector (Part No.EX631063)
from
$145.99
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:
See More
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
Top Picks for 1999 Freightliner MT45 Fuel Pumps
Upgrade Freightliner MT45s with top-quality Fuel Pumps parts, including 3 OEM and aftermarket selections for your 1999 model.
Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86604)
from
$83.99
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:
See More
Product Features:
- CAUTION: Furnished O-Ring must be installed on post for seal. For use with Deutz square sensor. NOT Interchangeable with 86422.
- Sensor Port Thread: M14 x 2.0; Standpipe
- Includes Standpipe. Sensor Port Thread: M14 x 2.0
- CAUTION: Furnished O-Ring must be installed on post for seal. For use with Deutz square sensor.
Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86651XE)
from
$45.99
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:
See More
Product Features:
- Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
- Made in USA
Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86408)
from
$53.99
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:
See More
Product Features:
- Designed to meet or exceed OE filter performance levels over the entire OE recommended service interval.
- Contains Sensor Port Thread: 1 1/4-10;Integral Post Seal
- Includes Integral Post Seal. Sensor Port Thread: 1 1/4-10
- CAUTION: Furnished O-Ring must be installed on post for seal.
FAQs for 1999 Freightliner MT45 Fuel and Emissions Systems
Which Fuel and Emissions Systems are best-sellers for 1999 Freightliner MT45s?
Out of 5 Fuel and Emissions Systems that fit 1999 Freightliner MT45s, the following parts are the top sellers:
- Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (10693707) – $83.99
- Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (10556575) – $45.99
- Diesel Exhaust Fluid Filter for SCR Systems (12005494) – $108.99
What’s the price range for 1999 Freightliner MT45 Fuel and Emissions Systems?
Fuel and Emissions System prices for the 1999 Freightliner MT45 start at $45.99 and go up to $145.99 for the most premium parts.
What’s the average price of a Fuel and Emissions System for a 1999 Freightliner MT45?
The average price for Fuel and Emissions Systems for the 1999 Freightliner MT45 is $87.79. 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 Freightliner MT45 model years?
What are the cheapest Fuel and Emissions Systems for my 1999 Freightliner MT45?
The cheapest 1999 Freightliner MT45 Fuel and Emissions Systems we carry in stock are:
- Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (10556575) – $45.99
- Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (10693602) – $53.99
- Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (10693707) – $83.99
- Diesel Exhaust Fluid Filter for SCR Systems (12005494) – $108.99
- Fuel Injector (11126216) – $145.99
What types of Fuel and Emissions Systems do you sell for my 1999 Freightliner MT45?
As of 11/2/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 1999 Freightliner MT45:
Can I get help with 1999 Freightliner MT45 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 Freightliner Fuel and Emissions Systems and more.
What is your return policy for Freightliner MT45 Fuel and Emissions Systems?
Advance Auto Parts keeps returns simple. For new Freightliner MT45 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.
