2020 Freightliner B2 Parts

The 2020 Freightliner B2 came with 4 engines (5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged, 6.7L L6 Turbocharged, and more), and the right parts depend on which one you have. We list 348 parts across all of them — each category page below covers every engine, and each row shows which 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

Not 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

24 parts · 2 subcategories · 4 brands Verified fitment Spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.

Body & Lamp Assembly Parts

28 parts · 1 subcategory · 1 brand Verified fitment Covers the exterior panels, bumpers, mirrors, lamps and the trim that keeps weather and road debris out.

Brake & Wheel Hub Parts

134 parts · 3 subcategories · 9 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.

Cooling System Parts

82 parts · 7 subcategories · 11 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

36 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

3 parts · 1 subcategory · 1 brand Verified fitment Covers the switches, relays and flashers that route power to everything the driver touches.

Engine Parts

6 parts · 2 subcategories · 4 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

7 parts · 3 subcategories · 4 brands Verified fitment Carries combustion gases out safely and keeps emissions equipment — catalytic converters, O2 sensors, EGR — doing its job.

Fuel & Air Parts

2 parts · 1 subcategory · 2 brands Verified fitment Meters fuel and air — pumps, injectors, filters, intake components and the sensors that balance the mixture.

Heat & Air Conditioning Parts

9 parts · 3 subcategories · 4 brands Verified fitment Keeps the cabin comfortable and the windshield clear through the compressor, condenser, evaporator, heater core and blower.

Suspension Parts

11 parts · 1 subcategory · 4 brands Verified fitment Controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.

Wiper & Washer Parts

6 parts · 1 subcategory · 3 brands Verified fitment Keeps the glass clear — blades, arms, linkages, washer pumps and nozzles.

Each category page covers all 4 engine options for the 2020 Freightliner B2 — every part shows the engine(s) it fits, and an on-page filter narrows it to yours.

Confirm your configuration

Make Year Model Engine Part category Subcategory

Other Freightliner B2 Years

2027 2026 2025 2024 2023 2022 2021 2019 2018 2017

Getting Fitment Right on the 2020 Freightliner B2

The 2020 Freightliner B2 was sold with 4 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 348 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 2020 Freightliner B2, 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 2020 Freightliner B2?

We list 348 parts for the 2020 Freightliner B2, organized into 12 categories across 4 engine options. Every part includes the brand, manufacturer part number and fitment notes.

Which engines came in the 2020 Freightliner B2?

Our records list 5.1L L4 DIESEL Turbocharged, 6.7L L6 DIESEL Turbocharged, 6.7L L6 Turbocharged, 8.0L V8 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 2020 Freightliner B2?

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 2020 Freightliner B2?

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.