Canada's Truck & Trailer Parts Distribution Warehouse. Founded in 1999, The Original Parts Warehouse (OPW) has developed a reputation for combining quality products with dependable service. What started off as a small parts operation in Southern Ontario, would eventually evolve into something much greater! Now based in Vaughan, Ontario, OPW's tenacity and dedication to build strong lasting relationships with our suppliers has enabled us to grow into an iconic Canadian distribution warehouse. With national reach, we are able to service the commercial industry with heavy duty truck & trailer parts! OPW is committed to its ever-growing hard parts offering for all applications.