2019 Freightliner FL Parts
The 2019 Freightliner FL came with 3 engines (3.9L L4 DIESEL Turbocharged, 4.8L L4 DIESEL Turbocharged, 6.3L L6 DIESEL Turbocharged), and the right parts depend on which one you have. We list 166 parts across all of them — each category page below covers every engine, and each row shows which engine(s) it fits.
Use the part number on every part as your anchor: match it to the number on your old part, or use it to cross-reference an aftermarket equivalent for an OEM part that's discontinued or overpriced.
Browse by Engine
3.9L L4 DIESEL Turbocharged
54 parts · 6 categories Verified fitment4.8L L4 DIESEL Turbocharged
59 parts · 8 categories Verified fitment6.3L L6 DIESEL Turbocharged
53 parts · 5 categories Verified fitmentNot sure which engine you have? Check the emissions label under the hood, your registration, or decode the VIN — the 8th character usually identifies the engine.
Parts by Category
Brake & Wheel Hub Parts
78 parts · 4 subcategories · 2 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.Cooling System Parts
36 parts · 1 subcategory · 3 brands Verified fitment Keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.Electrical Parts
2 parts · 1 subcategory · 1 brand Verified fitment Covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.Engine Parts
2 parts · 1 subcategory · 2 brands Verified fitment Covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.Exhaust & Emission Parts
15 parts · 1 subcategory · 1 brand Verified fitment Carries combustion gases out safely and keeps emissions equipment — catalytic converters, O2 sensors, EGR — doing its job.Fuel & Air Parts
3 parts · 2 subcategories · 2 brands Verified fitment Meters fuel and air — pumps, injectors, filters, intake components and the sensors that balance the mixture.Heat & Air Conditioning Parts
21 parts · 2 subcategories · 2 brands Verified fitment Keeps the cabin comfortable and the windshield clear through the compressor, condenser, evaporator, heater core and blower.Wiper & Washer Parts
9 parts · 1 subcategory · 2 brands Verified fitment Keeps the glass clear — blades, arms, linkages, washer pumps and nozzles.Each category page covers all 3 engine options for the 2019 Freightliner FL — every part shows the engine(s) it fits, and an on-page filter narrows it to yours.
Confirm your configuration
Other Freightliner FL Years
Getting Fitment Right on the 2019 Freightliner FL
The 2019 Freightliner FL was sold with 3 engines, and that single fact drives most fitment mistakes for this vehicle. Water pumps, radiators, belts, engine mounts, exhaust components and even brake packages can differ between engine options of the same model year. Every one of the 166 parts listed here shows the engine(s) it fits, and the category pages include a filter that hides everything that doesn't apply to yours.
OEM-grade and aftermarket brands are listed together wherever both publish fitment for the 2019 Freightliner FL, each with a full part number. That makes the practical workflow simple: find the subcategory, match the part number against your old part or repair quote, then choose the brand and grade that fits how the vehicle is used.
Frequently Asked Questions
How many parts fit the 2019 Freightliner FL?
We list 166 parts for the 2019 Freightliner FL, organized into 8 categories across 3 engine options. Every part includes the brand, manufacturer part number and fitment notes.
Which engines came in the 2019 Freightliner FL?
Our records list 3.9L L4 DIESEL Turbocharged, 4.8L L4 DIESEL Turbocharged, 6.3L L6 DIESEL Turbocharged. Parts frequently differ between them — a part verified for one engine is not guaranteed to fit another — so identify your engine first (emissions label under the hood, or the VIN's 8th character), then use the engine filter on each category page.
Are OEM and aftermarket parts both available for the 2019 Freightliner FL?
Yes — parts come from original-equipment suppliers and established aftermarket brands, shown side by side with their part numbers where both cover the same fitment. Cross-referencing those numbers is how you confirm an aftermarket part genuinely replaces the OEM one.
How do I verify a part number fits my 2019 Freightliner FL?
Search the number on this site: the result shows the part, its brand and every configuration with published fitment. If your exact year, model and engine appear in that list, the number is a match. The notes column carries any remaining qualifiers — position, trim or production date.
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.