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Freightliner M2 Business Class Parts

The Freightliner M2 Business Class semi-truck is a solid medium-duty truck that offers the versatility and reliability you'd expect from Freightliner, but we can make you stand out even more by customizing your semi truck with quality parts and chrome accessories from 4 State Trucks. When you drive an M2 Business Class, you'll enjoy top-notch features like maneuverability, roomy interior, and great driver visibility that make it fun and easy to keep your truck on the road. Whether you need bumpers, exhaust, fuel tanks, or any other aftermarket or custom parts for your M2, 4 State Trucks has got you covered - shop our selection of Freightliner parts today.
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  • BESTfit Cummins Water Pump For Cummins ISX/QSX Engine Replaces 3691299, 3692580, 4393548

    BESTfit Cummins Water Pump For Cummins ISX/QSX Engine Replaces 3691299, 3692580, 4393548

    BESTFIT TRUCK PARTS

    $479.99
    Water Pump By BESTfit Replaces 3691299, 3692580, 4393548 Fits Cummins ISX/QSX EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120154
    SKU:
    29-07120154
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $479.99
    Qty in Cart: 0
    Price:
    $479.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins 5.9L B-Series 1990-1998 Replaces 99315HD, 4429404, 97083

    BESTfit Cummins Water Pump For Cummins 5.9L B-Series 1990-1998 Replaces 99315HD, 4429404, 97083

    BESTFIT TRUCK PARTS

    $79.99
    Water Pump By BESTfit Replaces 99315HD, 4429404, 97083 Fits Cummins 5.9L B-Series 1990-1998Upgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part...
    29-07120148
    SKU:
    29-07120148
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $79.99
    Qty in Cart: 0
    Price:
    $79.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins 8.3L ISC/ISL/QSL Replaces 3802973, 6901245, A77579

    BESTfit Cummins Water Pump For Cummins 8.3L ISC/ISL/QSL Replaces 3802973, 6901245, A77579

    BESTFIT TRUCK PARTS

    $121.99
    Water Pump By BESTfit Replaces 3802973, 6901245, A77579 Fits Cummins 8.3L ISC/ISL/QSLUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120147
    SKU:
    29-07120147
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $121.99
    Qty in Cart: 0
    Price:
    $121.99
    Subtotal:
  • BESTfit Cummins EGR Cooler, Replaces 4352253, 5529388, 5566887 For Cummins

    BESTfit Cummins EGR Cooler, Replaces 4352253, 5529388, 5566887 For Cummins

    BESTFIT TRUCK PARTS

    $2,317.99
    EGR Cooler By BESTfit Replaces 4352253, 5529388, 5566887 Fits CumminsUpgrade your emissions system with the BESTfit Cummins EGR Cooler, a direct replacement for OEM part numbers 4352253, 5529388, and...
    29-07110014
    SKU:
    29-07110014
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $2,317.99
    Qty in Cart: 0
    Price:
    $2,317.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces 2243236, 3145155, 6031668 For Caterpillar C15 Acert Engine

    BESTfit CAT Water Pump, Replaces 2243236, 3145155, 6031668 For Caterpillar C15 Acert Engine

    BESTFIT TRUCK PARTS

    $585.99
    Water Pump By BESTfit Replaces 2243236, 3145155, 6031668 Fits Caterpillar C15 Acert EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part numbers...
    29-07120150
    SKU:
    29-07120150
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $585.99
    Qty in Cart: 0
    Price:
    $585.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ 88 mm Pulley For Dodge Ram 2500 Replaces 2852114R, 3959229, 5473172

    BESTfit Cummins Water Pump W/ 88 mm Pulley For Dodge Ram 2500 Replaces 2852114R, 3959229, 5473172

    BESTFIT TRUCK PARTS

    $55.99
    Water Pump W/ 88 mm Pulley By BESTfit Replaces 2852114R, 3959229, 5473172 Fits Dodge Ram 2500Enhance your engine cooling system with the BESTfit Cummins Water Pump with 88 mm pulley, a direct...
    29-07120144
    SKU:
    29-07120144
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $55.99
    Qty in Cart: 0
    Price:
    $55.99
    Subtotal:
  • BESTfit Cummins Sensor For Cummins Replaces 4384564, 5EL048, A054U491

    BESTfit Cummins Sensor For Cummins Replaces 4384564, 5EL048, A054U491

    BESTFIT TRUCK PARTS

    $504.99
    Sensor By BESTfit Replaces 4384564, 5EL048, A054U491 Fits CumminsUpgrade your engine monitoring system with the BESTfit Cummins Sensor, a direct replacement for OEM part numbers 4384564, 5EL048, and...
    29-07100084
    SKU:
    29-07100084
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $504.99
    Qty in Cart: 0
    Price:
    $504.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ 110 mm Pulley For Cummins 8.3L ISC/ISL/QSL Engine Replaces 19701979, 5346205, 6410399

    BESTfit Cummins Water Pump W/ 110 mm Pulley For Cummins 8.3L ISC/ISL/QSL Engine Replaces 19701979, 5346205, 6410399

    BESTFIT TRUCK PARTS

    $216.99
    Water Pump W/ 110 mm Pulley By BESTfit Replaces 19701979, 5346205, 6410399 Fits Cummins 8.3L ISC/ISL/QSL EngineEnhance your engine cooling system with the BESTfit Cummins Water Pump with 110 mm...
    29-07120146
    SKU:
    29-07120146
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $216.99
    Qty in Cart: 0
    Price:
    $216.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ 96.5mm Pulley For Cummins ISC/ISL/QSL Engine Replaces 182092, 3959582

    BESTfit Cummins Water Pump W/ 96.5mm Pulley For Cummins ISC/ISL/QSL Engine Replaces 182092, 3959582

    BESTFIT TRUCK PARTS

    $158.99
    Water Pump W/ 96.5mm Pulley By BESTfit Replaces 182092, 3959582 Fits Cummins ISC/ISL/QSL EngineEnhance your cooling system with the BESTfit Cummins Water Pump with 96.5mm pulley, a direct replacement...
    29-07120140
    SKU:
    29-07120140
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $158.99
    Qty in Cart: 0
    Price:
    $158.99
    Subtotal:
  • BESTfit Detroit Diesel Temperature Sensor For Detroit Engines Replaces 2120200002, DDEA6805401917, SKT283

    BESTfit Detroit Diesel Temperature Sensor For Detroit Engines Replaces 2120200002, DDEA6805401917, SKT283

    BESTFIT TRUCK PARTS

    $86.99
    Temperature Sensor By BESTfit Replaces 2120200002, DDEA6805401917, SKT283 Fits Detroit EnginesUpgrade your engine monitoring system with the BESTfit Detroit Diesel Temperature Sensor, a direct...
    29-07100080
    SKU:
    29-07100080
    Style Options:
    Detroit
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $86.99
    Qty in Cart: 0
    Price:
    $86.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ 110 mm Pulley For Cummins 8.3L ISC/ISL/QSL Replaces 3286293, 4086, G4089647

    BESTfit Cummins Water Pump W/ 110 mm Pulley For Cummins 8.3L ISC/ISL/QSL Replaces 3286293, 4086, G4089647

    BESTFIT TRUCK PARTS

    $216.99
    Water Pump W/ 110 mm Pulley By BESTfit Replaces 3286293, 4086, G4089647 Fits Cummins 8.3L ISC/ISL/QSLEnhance your engine cooling system with the BESTfit Cummins Water Pump with 110 mm pulley, a...
    29-07120142
    SKU:
    29-07120142
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $216.99
    Qty in Cart: 0
    Price:
    $216.99
    Subtotal:
  • BESTfit Cummins EGR Cooler For Cummins Replaces 4955922, 4988884, 904333

    BESTfit Cummins EGR Cooler For Cummins Replaces 4955922, 4988884, 904333

    BESTFIT TRUCK PARTS

    $1,071.99
    EGR Cooler By BESTfit Replaces 4955922, 4988884, 904333 Fits CumminsEnhance your emissions system with the BESTfit Cummins EGR Cooler, a direct replacement for OEM part numbers 4955922, 4988884, and...
    29-07110016
    SKU:
    29-07110016
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,071.99
    Qty in Cart: 0
    Price:
    $1,071.99
    Subtotal:
  • BESTfit Cummins Temperature Sensor For Cummins Replaces 2872469, 4984757, SKT264

    BESTfit Cummins Temperature Sensor For Cummins Replaces 2872469, 4984757, SKT264

    BESTFIT TRUCK PARTS

    $177.99
    Temperature Sensor By BESTfit Replaces 2872469, 4984757, SKT264 Fits CumminsUpgrade your engine monitoring system with the BESTfit Cummins Temperature Sensor, a direct replacement for OEM part...
    29-07100087
    SKU:
    29-07100087
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $177.99
    Qty in Cart: 0
    Price:
    $177.99
    Subtotal:
  • BESTfit Detroit Diesel Temperature Sensor For Detroit Engines Replaces 04320774, 10031028, 2120200003

    BESTfit Detroit Diesel Temperature Sensor For Detroit Engines Replaces 04320774, 10031028, 2120200003

    BESTFIT TRUCK PARTS

    $73.99
    Detroit Diesel Temperature Sensor By BESTfit Replaces 04320774, 10031028, 2120200003 Fits Detroit EnginesUpgrade your engine monitoring system with the BESTfit Detroit Diesel Temperature Sensor, a...
    29-07100076
    SKU:
    29-07100076
    Product Type:
    Engine Parts
    Style Options:
    Detroit
    Make:
    Universal Items
    $73.99
    Qty in Cart: 0
    Price:
    $73.99
    Subtotal:
  • BESTfit Cummins Sensor For Cummins Replaces S27076, 4921729, 4903035

    BESTfit Cummins Sensor For Cummins Replaces S27076, 4921729, 4903035

    BESTFIT TRUCK PARTS

    $403.99
    Sensor By BESTfit Replaces S27076, 4921729, 4903035 Fits CumminsEnhance your engine emissions system with the BESTfit Cummins EGR Differential Pressure Sensor, a direct replacement for OEM part...
    29-07110015
    SKU:
    29-07110015
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $403.99
    Qty in Cart: 0
    Price:
    $403.99
    Subtotal:
  • BESTfit Cummins Sensor For Cummins Replaces 4384566, 5654170, SKT1307

    BESTfit Cummins Sensor For Cummins Replaces 4384566, 5654170, SKT1307

    BESTFIT TRUCK PARTS

    $529.99
    Sensor By BESTfit Replaces 4384566, 5654170, SKT1307 Fits CumminsUpgrade your engine monitoring system with the BESTfit Cummins Sensor, a direct replacement for OEM part numbers 4384566, 5654170, and...
    29-07100086
    SKU:
    29-07100086
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $529.99
    Qty in Cart: 0
    Price:
    $529.99
    Subtotal:
  • BESTfit Cummins Temperature Sensor For Cummins Replaces 5461615, A057K158, SKT1294

    BESTfit Cummins Temperature Sensor For Cummins Replaces 5461615, A057K158, SKT1294

    BESTFIT TRUCK PARTS

    $355.99
    Temperature Sensor By BESTfit Replaces 5461615, A057K158, SKT1294 Fits CumminsUpgrade your engine monitoring system with the BESTfit Cummins Temperature Sensor, a direct replacement for OEM part...
    29-07100083
    SKU:
    29-07100083
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $355.99
    Qty in Cart: 0
    Price:
    $355.99
    Subtotal:
  • BESTfit Warner Retrofit Kit K32 Replaces 10334070001

    BESTfit Warner Retrofit Kit K32 Replaces 10334070001

    BESTFIT TRUCK PARTS

    $601.99
    Warner Retrofit Kit K32 By BESTfit Replaces 10334070001Upgrade your cooling system with the BESTfit Warner Retrofit Kit K32, a direct replacement for OEM part number 10334070001. Designed for Borg...
    29-07060201
    SKU:
    29-07060201
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $601.99
    Qty in Cart: 0
    Price:
    $601.99
    Subtotal:
  • BESTfit Cummins Temperature Sensor For Cummins ISM Engines Replaces 0451235, 10031032, 2120750002

    BESTfit Cummins Temperature Sensor For Cummins ISM Engines Replaces 0451235, 10031032, 2120750002

    BESTFIT TRUCK PARTS

    $133.99
    Temperature Sensor By BESTfit Replaces 0451235, 10031032, 2120750002 Fits CumminsUpgrade your engine monitoring system with the BESTfit Cummins Temperature Sensor, a direct replacement for OEM part...
    29-07100082
    SKU:
    29-07100082
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $133.99
    Qty in Cart: 0
    Price:
    $133.99
    Subtotal:
  • BESTfit Cummins Sensor For Cummins Replaces 2131538, 4384562, 5654166

    BESTfit Cummins Sensor For Cummins Replaces 2131538, 4384562, 5654166

    BESTFIT TRUCK PARTS

    $278.99
    Sensor By BESTfit Replaces 2131538, 4384562, 5654166 Fits CumminsUpgrade your engine monitoring system with the BESTfit Cummins Sensor, a direct replacement for OEM part numbers 2131538, 4384562, and...
    29-07100085
    SKU:
    29-07100085
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $278.99
    Qty in Cart: 0
    Price:
    $278.99
    Subtotal:
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Adding your products to cart

When your Freightliner M2 Business Class is your daily workhorse, you need parts that can keep up. Whether you're hauling, delivering, or running job to job, our aftermarket parts and accessories help your rig stay sharp, strong, and road-ready.

Aftermarket Freightliner M2 Business Accessories

Our aftermarket semi truck parts are reliable, high-quality components—from front bumpers and grilles to lights, mirrors, exhausts, and more. Need engine parts to keep your powertrain smooth? Or custom touches to make your truck stand out? We’ve got it all.

Why Upgrade Your Semi Truck Parts?

- Built for performance: Get durable parts that stand up to heavy-duty jobs. - Boost your style: Chrome accents, lighting upgrades, and custom add-ons. - Fit you can trust: Designed to match the M2’s exact specs for a smooth install. - Versatile options: Perfect for owner-operators, fleets, and vocational trucks.
Whether you’re replacing worn components or tricking out your cab, the right parts make all the difference. Keep your Freightliner M2 Business Class looking great and running strong—mile after mile.

Frequently Asked Questions About Freightliner M2 Business Class Parts

What years and models of Freightliner M2 Business Class trucks do your parts fit?

Our parts are designed to fit Freightliner M2 Business Class trucks from 2003 to present. However, compatibility can vary by specific part type. For bumpers and body panels, there are typically three main design generations: 2003-2007, 2008-2017, and 2018-present. Always check the product description for exact year ranges, or contact our team with your OEM number to ensure proper fitment. Some parts may also fit the M2 106 and M2 112 variants, but verify compatibility before ordering.

Are aftermarket bumpers as durable as OEM parts, and what materials are they made from?

Quality aftermarket bumpers for the M2 Business Class are typically constructed from either heavy-duty steel (16-gauge or thicker) or high-impact ABS plastic, depending on the application. Steel bumpers often feature chrome plating or powder coating for corrosion resistance. While OEM parts meet factory specifications, many aftermarket options actually exceed OEM durability standards, especially those designed for vocational use. Look for bumpers with reinforced mounting brackets and proper drainage holes to prevent rust. We clearly specify material thickness and coating type in each product listing.

What are the most common installation challenges when replacing M2 Business Class bumpers?

The most frequent installation issues include: alignment with existing mounting holes (especially on 2008+ models where hole patterns changed), proper fitment around fog lights and sensors, and weight management during installation (steel bumpers can weigh 80-150 pounds). Many customers report needing to slightly enlarge mounting holes or use washers for proper alignment. We recommend having a second person assist with installation and using a floor jack to support the bumper during mounting. Installation typically takes 2-3 hours with basic tools, though vehicles with air dam systems or integrated step plates may require additional time.

What finish options are available, and which holds up best for different applications?

Common finishes include chrome-plated steel, polished stainless steel, painted steel, and textured plastic. For highway applications, chrome provides the classic look but requires regular maintenance to prevent pitting. Polished stainless steel costs more initially but resists corrosion better in salt-heavy regions. For vocational trucks in construction or waste management, painted steel bumpers with textured powder coating offer the best impact resistance and easy touch-up capability. Plastic bumpers work well for urban delivery trucks where weight savings and minor impact absorption are priorities.

Do I need to order additional hardware or brackets when buying a replacement bumper?

Most replacement bumpers come with new mounting brackets, but rarely include bolts, nuts, or washers. Plan to purchase Grade 8 hardware separately - typically you'll need 8-12 bolts (usually 1/2" or 5/8" diameter) with corresponding lock washers and nuts. Some installations may require bumper-to-frame adapter brackets if switching between bumper styles or upgrading from plastic to steel. Fog light brackets, license plate holders, and step plates are usually sold separately. Check if your existing hardware is reusable, but having new hardware on hand prevents installation delays.


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