X-Cart Powering the Classics: How OldBuickParts Modernized the Fitment Data Experience

Since 1973, Cars LLC (OldBuickParts.com) has quietly and consistently been preserving America’s automotive history. What began as a hobbyist’s mission to restore a family heirloom, when the founder tuned, rebuilt, and preserved his grandfather’s 1951 Buick, has evolved into a global destination for Buick enthusiasts.

Today, Cars LLC is the world’s largest Buick parts supplier, managing over 1 million individual pieces of inventory and 15,000+ SKUs for Buick models spanning 1935 to 1987.

Like many businesses in adjacent automotive niches, OldBuickParts faced familiar challenges: highly complex catalogs, vehicle-specific fitments, and the need to scale without compromising accuracy, performance, or usability. Their previous generic eCommerce platform was never designed to support Year-Make-Model logic or deep aftermarket inventories – only amplifying these issues as the business grew.

To address these challenges head-on, Cars LLC partnered with X-Cart, transforming a massive, intricate inventory into a streamlined, scalable, and customer-first digital experience built specifically for the automotive aftermarket.

Challenge: Scaling Without Sacrificing Performance

OldBuickParts is a market leader with decades of expertise and a vast physical inventory. However, their biggest challenge was bridging the gap between “old-school” experience and modern eCommerce expectations. Meeting those expectations required a scalable eCommerce foundation.

Initially, OldBuickParts chose WordPress, but quickly ran into limitations. Catalog data had to be entered manually, fitment logic was unsupported, and plugin-based solutions created complexity rather than clarity.

Why X-Cart: Fitment Data Management, Made Efficient

OldBuickParts knew their catalog, their customers, and their niche—but their platform was holding them back. Moving to X-Cart unlocked cleaner catalog management and a buying experience built for real-world automotive complexity.

Accurate Parts Search = Customer Trust

The number one reason OldBuickParts chose X-Cart was its native fitment search tools, including:

• Year / Make / Model search
• VIN lookup
• My Garage functionality

These features ensure customers see only the parts that fit, building confidence and reducing costly returns.

Less Manual Work = More Time to Grow

With the Bulk Fitment Tool, custom-built by X-Cart for OldBuickParts, a repetitive administrative burden was transformed into a competitive advantage. Admins can now bulk-assign vehicle makes, models, and years through an intuitive tree-based interface.

Instead of repeatedly selecting Make → Model → Year in individual dropdowns and saving changes one by one, teams can assign multiple fitments in seconds. This not only saves time – it improves catalog integrity, boosts customer trust, and drives higher conversion rates.

Bulk Catalog Import

X-Cart’s bulk catalog import tools enable fast, reliable updates to large automotive catalogs. Scheduled imports ensure product data stays accurate and up to date, freeing the OldBuickParts team to focus on growth instead of manual data maintenance.

Main Insight

Like many online auto parts retailers competing in today’s eCommerce landscape, OldBuickParts began to feel the pressure as demand increased and customer expectations shifted toward faster, more intuitive online experiences. As a result, the operational challenges common to restoration and specialty parts retailers started to surface.

For auto parts retailers, choosing an eCommerce platform that supports efficient data management, industry-specific requirements, and long-term scalability is no longer optional—it’s essential.