Used Commercial Diesel Engines
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Motors for Major Brands

All parts are test-driven before delivery and come with a 1-month warranty. Get an extra 10% OFF on your first order.

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Used Engines & Used Transmissions for Commercial Vehicles in California

Commercial vehicles need dependable power and durable components to stay productive every day. From freight trucks and box trucks to delivery vans and fleet vehicles, reliable engines and transmissions are essential for keeping operations on schedule and reducing expensive downtime.

Why California Businesses Choose Us

Trusted by fleets, owner-operators, and repair shops across California

Large Inventory

Extensive selection of used commercial vehicle engines & transmissions for all major truck brands.

Quality-Tested Parts

Every engine and transmission inspected for dependable commercial performance.

Competitive Pricing

Budget-friendly repairs that help control maintenance expenses for fleets and owner-operators.

Fast Shipping

Quick delivery across California and nationwide to minimize costly downtime.

Fleet Support

Dedicated service for fleets, owner-operators, and commercial repair shops.

Warranty Options

Warranty coverage available on select units for added peace of mind.

Commercial Truck Brands We Serve

Quality-tested engines and transmissions for major commercial vehicle manufacturers

Freightliner engines and transmissions
Freightliner

Used Freightliner Engines & Transmissions

Used Engines

Freightliner trucks are trusted for long-haul transportation, logistics, and commercial fleet operations. Our quality-tested used Freightliner engines help restore dependable power while reducing replacement costs for owner-operators and businesses.

Used Transmissions

Our used Freightliner transmissions are thoroughly inspected for smooth shifting, dependable drivetrain performance, and long-term commercial reliability. They provide an affordable solution for keeping Freightliner trucks operating efficiently.

Heavy-duty commercial performance
Long-haul reliability
Quality-tested engines
Smooth-shifting transmissions
Fast California & nationwide shipping
Mack engines and transmissions
Mack

Used Mack Engines & Transmissions

Used Engines

Mack trucks are engineered for construction, heavy hauling, and demanding commercial applications. Our inspected used Mack engines deliver dependable power while helping reduce maintenance costs for fleets and owner-operators.

Used Transmissions

Our used Mack transmissions are inspected for reliable shifting, heavy-duty drivetrain strength, and long-term commercial performance. They provide a dependable replacement solution that minimizes downtime.

Heavy-haul capability
Construction-ready performance
Quality-tested powertrain
Reliable drivetrain operation
Fleet & owner-operator support
Peterbilt engines and transmissions
Peterbilt

Used Peterbilt Engines & Transmissions

Used Engines

Peterbilt trucks are built for demanding workloads, long-haul transportation, and dependable commercial performance. Our quality-tested used Peterbilt engines provide a practical replacement solution for restoring power while helping fleets and owner-operators control repair costs.

Used Transmissions

Our used Peterbilt transmissions are inspected for smooth shifting, dependable drivetrain operation, and reliable heavy-duty performance. They provide a cost-effective replacement option for commercial trucks operating across California and nationwide.

Long-haul performance
Heavy-duty power delivery
Quality-tested replacement engines
Smooth transmission operation
Fleet & owner-operator support
Volvo engines and transmissions
Volvo

Used Volvo Engines & Transmissions

Used Engines

Volvo commercial trucks are known for efficient performance, advanced engineering, and dependable long-distance operation. Our used Volvo engines are inspected to help restore reliable power, fuel efficiency, and everyday productivity for commercial vehicles.

Used Transmissions

We provide used Volvo transmissions tested for smooth shifting, dependable operation, and long-term commercial use. These replacement units help reduce repair expenses and get fleet vehicles back on the road with minimal downtime.

Efficient commercial performance
Advanced engineering
Reliable long-distance operation
Quality-inspected components
Cost-effective fleet repairs
International engines and transmissions
International

Used International Engines & Transmissions

Used Engines

International trucks support a wide range of commercial applications including freight, delivery, construction, and fleet operations. Our used International engines are inspected to provide dependable power and practical value for demanding business use.

Used Transmissions

Our used International transmissions are quality-tested for reliable shifting, drivetrain strength, and consistent commercial operation. They offer an affordable replacement solution for businesses looking to reduce downtime and extend truck service life.

Commercial-grade reliability
Fleet-ready performance
Reliable drivetrain strength
Quality-tested replacement parts
Fast California & nationwide shipping

Why Choose The AutoKing USA?

Trusted nationwide for tested used engines, quality transmissions, dependable warranties, and fast delivery

Built for Commercial Vehicle Needs

We understand that every hour off the road costs money. That's why we focus on dependable parts, fast delivery, and service that helps businesses stay operational.

Cost-Effective Repairs

Save money compared to new replacements while maintaining heavy-duty performance and reliability.

Reliable Quality

Each engine and transmission is thoroughly inspected for dependable commercial use and long service life.

Wide Inventory

Parts available for many truck brands, fleet vehicles, and commercial applications across all major manufacturers.

Fast California Shipping

Quick delivery across California and nationwide to reduce downtime and keep your fleet moving.

Common Questions

FAQs – Commercial Used Engines & Used Transmissions

Everything you need to know about commercial vehicle parts

You can buy commercial used engines and used transmissions from trusted auto parts suppliers, truck salvage yards, fleet dismantlers, and online marketplaces that specialize in heavy-duty vehicle components. Choose sellers that offer testing, warranty options, and nationwide shipping to ensure quality and reliability.

Yes, commercial used engines can be reliable when purchased from a reputable supplier. Quality-tested engines with verified mileage, inspection reports, and warranty coverage are often a cost-effective replacement option for trucks and fleet vehicles. Proper installation and maintenance further ensure long-term performance.

The cost depends on the make, model, engine size, mileage, and availability. Heavy-duty diesel engines usually cost more than standard gas engines. Used engines are generally more affordable than rebuilt or new replacements, offering significant savings while maintaining reliability.

Used commercial transmission prices vary based on vehicle type, brand, manual or automatic system, condition, and market demand. Buying a tested used transmission can help reduce repair expenses significantly compared to new or rebuilt options.

Common commercial vehicle brands include Freightliner, Mack, Peterbilt, Kenworth, Volvo, International, Isuzu, Hino, Ford, GMC, Chevrolet, and Dodge commercial trucks and vans. We carry a wide inventory covering most major commercial vehicle manufacturers.

Many trusted suppliers offer warranty options on used commercial engines and transmissions. Coverage may vary depending on part type, mileage, and supplier terms. Always verify warranty details before purchase to ensure adequate protection for your investment.

Use your VIN number, engine code, year, make, and model to confirm compatibility. A reliable seller can help match the correct engine or transmission for your commercial vehicle. Providing detailed vehicle information ensures you receive the right part for seamless installation.

Need help with commercial parts?

Our fleet specialists are ready to assist with bulk orders and technical support.

Call +1 (866) 486-5915