2021 International LT Parts
2 engine options are listed for the 2021 International LT, including the 12.4L L6 DIESEL Turbocharged, 14.9L L6 DIESEL Turbocharged. Because brake, cooling and drivetrain parts often differ between them, every part in the category pages below shows the engine(s) it fits.
Every part carries its brand and manufacturer part number, so you can compare OEM-grade and aftermarket options for the same fitment and cross-reference the number against the part you're replacing before anything goes in the cart.
Browse by Engine
12.4L L6 DIESEL Turbocharged
144 parts · 16 categories Verified fitment14.9L L6 DIESEL Turbocharged
203 parts · 15 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
Belt Drive Parts
39 parts · 3 subcategories · 8 brands Verified fitment Spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.Body & Lamp Assembly Parts
18 parts · 2 subcategories · 2 brands Verified fitment Covers the exterior panels, bumpers, mirrors, lamps and the trim that keeps weather and road debris out.Brake & Wheel Hub Parts
43 parts · 6 subcategories · 9 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.Cooling System Parts
69 parts · 11 subcategories · 13 brands Verified fitment Keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.Drivetrain Parts
2 parts · 1 subcategory · 1 brand Verified fitment Moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.Electrical Parts
15 parts · 3 subcategories · 6 brands Verified fitment Covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.Electrical Switch & Relay Parts
5 parts · 2 subcategories · 3 brands Verified fitment Covers the switches, relays and flashers that route power to everything the driver touches.Engine Parts
23 parts · 8 subcategories · 9 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
29 parts · 10 subcategories · 6 brands Verified fitment Carries combustion gases out safely and keeps emissions equipment — catalytic converters, O2 sensors, EGR — doing its job.Fuel & Air Parts
25 parts · 3 subcategories · 6 brands Verified fitment Meters fuel and air — pumps, injectors, filters, intake components and the sensors that balance the mixture.Heat & Air Conditioning Parts
41 parts · 10 subcategories · 12 brands Verified fitment Keeps the cabin comfortable and the windshield clear through the compressor, condenser, evaporator, heater core and blower.Interior Parts
3 parts · 2 subcategories · 1 brand Verified fitment Covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear.Steering Parts
2 parts · 1 subcategory · 1 brand Verified fitment Connects driver to road through the rack, pump, tie rods, and column components.Suspension Parts
24 parts · 1 subcategory · 3 brands Verified fitment Controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.Automatic Transmission Parts
6 parts · 1 subcategory · 3 brands Verified fitment Covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.Manual Transmission Parts
1 part · 1 subcategory · 1 brand Verified fitment Covers the manual gearbox and clutch system — discs, pressure plates, flywheels, slave and master cylinders, shift components.Wiper & Washer Parts
2 parts · 1 subcategory · 1 brand Verified fitment Keeps the glass clear — blades, arms, linkages, washer pumps and nozzles.Each category page covers all 2 engine options for the 2021 International LT — every part shows the engine(s) it fits, and an on-page filter narrows it to yours.
Confirm your configuration
Other International LT Years
Getting Fitment Right on the 2021 International LT
The 2021 International LT was sold with 2 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 347 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 2021 International LT, 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 2021 International LT?
We list 347 parts for the 2021 International LT, organized into 17 categories across 2 engine options. Every part includes the brand, manufacturer part number and fitment notes.
Which engines came in the 2021 International LT?
Our records list 12.4L L6 DIESEL Turbocharged, 14.9L 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 2021 International LT?
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 2021 International LT?
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.