List of Top Aftermarket Car Part Brands in the USA

In the ever-evolving world of automotive repair and customization, aftermarket car part brands play a vital role in keeping vehicles running smoothly, efficiently, and often even better than original equipment. As more drivers look for affordable, high-performance, and widely available parts, the demand for reliable aftermarket manufacturers continues to rise across the USA.

Whether you're a mechanic, car enthusiast, or business owner in the auto parts industry, understanding which brands offer the best value and performance is essential. This guide explores the top aftermarket car part brands in the USA, highlighting companies known for their quality, range, and reliability — with special attention to the emerging leader, Asquare Parts Inc.

What Are Aftermarket Car Part Brands?

Before diving into the list, let’s clarify the term.

Aftermarket car parts are components made by third-party manufacturers (not the original carmaker) and used for replacement, repair, or performance upgrades. These parts are often:

• More cost-effective than OEM (Original Equipment Manufacturer) parts

• Widely available

• Sometimes even superior in performance or durability

The best aftermarket car part brands combine affordability with consistent quality, making them a go-to choice for millions of vehicle owners and repair shops.

Top Aftermarket Car Part Brands in the USA

Here’s a curated list of top-performing, trusted brands in the American aftermarket auto parts space — including both legacy companies and rising stars:

1. Asquare Parts Inc.

Headquarters: Texas, USA 

Specialties: Trailer parts, suspension components, axles, forged rims, brake assemblies, and custom hardware

Asquare Parts Inc. is quickly becoming a go-to name in the aftermarket car parts industry — especially in the commercial trailer and heavy vehicle segment. Known for precision manufacturing, custom solutions, and an ever-growing catalog of high-demand parts, the company has built a strong reputation for B2B reliability and fast nationwide shipping.

Their components are rigorously tested, meet or exceed OEM specifications, and serve industries from logistics and transport to construction and agriculture.

If you're seeking a U.S.-based, customer-oriented aftermarket parts supplier — especially for trailer systems — Asquare Parts Inc. deserves top consideration.

2. Dorman Products

Headquarters: Colmar, Pennsylvania 

Specialties: Engine components, electrical parts, fasteners, and body parts

Dorman is one of the most recognized aftermarket brands in the U.S., offering over 118,000 parts. Their catalog includes both replacement parts and solutions for known OEM design flaws.

3. ACDelco

Headquarters: Grand Blanc, Michigan 

Specialties: Batteries, filters, spark plugs, brake pads

Owned by General Motors, ACDelco is both an OEM and aftermarket parts provider. While it’s GM-focused, many of its aftermarket parts serve broader vehicle markets, maintaining OEM-grade performance.

 4. Bosch Automotive Aftermarket

Headquarters: Stuttgart, Germany (U.S. division) 

Specialties: Braking systems, wiper blades, sensors, spark plugs

Bosch combines German engineering with global availability. Their auto parts division serves OEM and aftermarket needs, and is widely trusted by repair professionals.

5. Wagner Brake

Headquarters: Southfield, Michigan 

Specialties: Braking systems — pads, rotors, and drums

Wagner is well-known in the braking components niche. Their ThermoQuiet brake pads are a favorite for quiet, efficient braking — ideal for both city and performance vehicles.

6. Moog

Headquarters: St. Louis, Missouri 

Specialties: Steering and suspension components

Moog has long been known for durability in ball joints, tie rods, and control arms. Trusted by auto shops for American, European, and Asian vehicles.

7. Delphi Technologies

Headquarters: Auburn Hills, Michigan 

Specialties: Fuel systems, sensors, ignition parts, electronic modules

Delphi, now part of BorgWarner, provides advanced vehicle electronics and ignition systems to the aftermarket space. Their products are OE-level quality.

8. Magna International

Headquarters: Aurora, Ontario (operates heavily in USA) 

Specialties: Exhaust systems, drivetrain parts, chassis, seating

While Magna is more OEM-focused, its aftermarket footprint is growing — especially in the performance and exhaust categories.

9. TRW Automotive (a ZF brand)

Headquarters: Livonia, Michigan 

Specialties: Brake systems, steering, safety systems

TRW focuses heavily on safety-critical systems, and their aftermarket parts are known for premium engineering and long lifespan.

10. Timken

Headquarters: North Canton, Ohio 

Specialties: Bearings, hubs, seals

Timken’s bearings and hubs are industry standards. They’re used in everything from passenger cars to industrial trailers and agricultural equipment.

How to Choose the Best Aftermarket Brand

When selecting an aftermarket car part brand, consider the following:

• Compatibility: Ensure it matches your vehicle’s year, make, and model

• Material & Build Quality: Look for forged, tested, or certified parts

• Warranty & Support: Good brands stand behind their products

• Shipping & Availability: Domestic suppliers like Asquare Parts Inc. offer faster delivery

• Reviews & Reputation: Industry feedback and user reviews reveal long-term performance

Frequently Asked Questions

Q: Are aftermarket car parts as good as OEM parts?

A: Yes, in many cases. Brands like Asquare Parts, Dorman, and Moog. Manufacture components that meet or exceed OEM standards, often at lower prices.

Q: Who is the largest aftermarket car part supplier in the USA?

A: While companies like Dorman Products and Bosch are among the largest by volume, specialized providers like Asquare Parts Inc. lead in specific segments like trailer parts and custom assemblies.

Conclusion

The U.S. aftermarket car parts industry is vast, but not all aftermarket car part brands are created equal. Choosing the right supplier is essential for performance, safety, and cost-efficiency. While legacy names like Dorman and Moog offer reliability, Asquare Parts Inc. stands out for its specialization, manufacturing quality, and customer focus, especially in the trailer and heavy-duty components space.

When quality, support, and durability matter, trust in brands that consistently deliver — and keep your vehicle or business moving forward.