About United Prime Auto Parts
A leading B2B distributor of factory-grade remanufactured and OEM engines and transmissions—built on technical precision, supply-chain transparency, and mechanical expertise.
We partner with commercial repair shops, fleet managers, automotive technicians, and wholesale parts distributors to deliver high-ticket powertrain solutions that keep American vehicles moving.
Raising the Standard for Powertrain Sourcing
In an aftermarket landscape often diluted by inconsistent quality and inaccurate fitment, United Prime Auto Parts was established to raise the standard for heavy mechanical component sourcing. We specialize exclusively in complete gas and diesel engine assemblies, automatic and manual transmissions, torque converters, and transfer cases covering major domestic and import brands.
By bridging direct inventory access with factory reconditioning standards, we serve as a single, dependable powertrain partner for commercial operations requiring rapid turnaround times, transparent pricing, and zero compromise on reliability.
Our mission is to eliminate vehicle downtime through reliable mechanical engineering, exact fitment execution, and straightforward commercial service. Whether replacing a high-demand fleet engine or sourcing a hard-to-find transmission assembly, United Prime Auto Parts stands behind every powertrain product with industrial-grade integrity and dedicated customer support.
Ready to Source Your Next Part?
Talk to a parts specialist today. We’ll confirm fitment, pricing, and ship time—fast.