2021 Peterbilt 325 Fuel and Emissions Systems
Find Your Specific 2021 Peterbilt 325 Fuel and Emissions Systems
Below you will find various in-demand Peterbilt Fuel and Emissions Systems, components and accessories for your 2021 325. Advance Auto Parts has popular 325 parts like Diesel Fuel Injectors, Fuel Pumps, Diesel Emission Parts and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other 325 model years including
2012,
2013,
2014,
2015,
2016,
2017,
2018,
2020,
2022 and more. Select a category of 2021 Peterbilt 325 Fuel and Emissions Systems below and start saving instantly.
Popular 2021 Peterbilt 325 Fuel and Emissions Systems Categories
Essential Fuel and Emissions Systems for 2021 Peterbilt 325s
Carquest Premium – Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (Part No.86965)
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:
See More
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.
Carquest Premium – Diesel Exhaust Fluid Filter Kit (Part No.96877)
from
$324.99
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 Frost Compensation Membrane, Spray Lubricant, Instruction Sheet
DAYTON PARTS – WIRING HARNESS (Part No.311-0015)
from
$175.99
WIRING HARNESS
Upgrade your 2021 Peterbilt 325 with Top-Quality Fuel and Emissions Systems
When it comes to maintaining or upgrading your 2021 Peterbilt 325, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Peterbilt or enhancing its overall performance, Fuel and Emissions Systems are key to keeping your 325 functioning at its best. At Advance Auto Parts, we offer a wide selection of 3 Fuel and Emissions Systems for the 2021 Peterbilt 325, designed to meet your needs without breaking the bank.
From
Diesel 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 2021 Peterbilt 325 at great prices.
Our Fuel and Emissions Systems inventory for this model
ranges from just $89.99 to $324.99, with
an average price of $196.99.
Our 3 Fuel and Emissions Systems in stock come from 2 trusted brands, so you’re sure to find the right part for your 2021 Peterbilt 325 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 2021 Peterbilt 325 is always ready to roll. We’re committed to providing you with everything you need to keep your 325 in top shape, all in one place.
Start shopping confidently below for your 2021 Peterbilt 325!
Best-Selling Diesel Fuel Injectors for 2021 Peterbilt 325s
Enhance the driving experience in your Peterbilt with 1 quality Diesel Fuel Injector components, starting at $324.99.
Carquest Premium – Diesel Exhaust Fluid Filter Kit (Part No.96877)
from
$324.99
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 Frost Compensation Membrane, Spray Lubricant, Instruction Sheet
Most Popular 2021 Peterbilt 325 Fuel Pumps
Customize your Peterbilt 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)
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:
See More
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.
Top Picks for 2021 Peterbilt 325 Diesel Emission Parts
Upgrade Peterbilt 325s with top-quality Diesel Emission Parts parts, including 1 OEM and aftermarket selections for your 2021 model.
DAYTON PARTS – WIRING HARNESS (Part No.311-0015)
from
$175.99
WIRING HARNESS
FAQs for 2021 Peterbilt 325 Fuel and Emissions Systems
Which Fuel and Emissions Systems are best-sellers for 2021 Peterbilt 325s?
Out of 3 Fuel and Emissions Systems that fit 2021 Peterbilt 325s, the following parts are the top sellers:
- Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (10693978) – $89.99
- Diesel Exhaust Fluid Filter Kit (12501680) – $324.99
- WIRING HARNESS (50177046) – $175.99
What’s the price range for 2021 Peterbilt 325 Fuel and Emissions Systems?
Fuel and Emissions System prices for the 2021 Peterbilt 325 start at $89.99 and go up to $324.99 for the most premium parts.
What’s the average price of a Fuel and Emissions System for a 2021 Peterbilt 325?
The average price for Fuel and Emissions Systems for the 2021 Peterbilt 325 is $196.99. 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 Peterbilt 325 model years?
What are the cheapest Fuel and Emissions Systems for my 2021 Peterbilt 325?
The cheapest 2021 Peterbilt 325 Fuel and Emissions Systems we carry in stock are:
- Fuel/Water Separator: Quality Removal of Water and Contaminants from Fuel System (10693978) – $89.99
- WIRING HARNESS (50177046) – $175.99
- Diesel Exhaust Fluid Filter Kit (12501680) – $324.99
What types of Fuel and Emissions Systems do you sell for my 2021 Peterbilt 325?
As of 11/2/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 2021 Peterbilt 325:
Can I get help with 2021 Peterbilt 325 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 Peterbilt Fuel and Emissions Systems and more.
What is your return policy for Peterbilt 325 Fuel and Emissions Systems?
Advance Auto Parts keeps returns simple. For new Peterbilt 325 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.
