Monitoring how vehicle inventory levels shift across brands and models is critical for understanding the U.S. auto market. The U.S. Automotive Inventory Availability Dashboard helps you track these changes over time, compare new and used availability, and explore down to the model level for deeper insights. It’s a weekly view into the supply side of the automotive market, giving you the context to make better decisions about pricing, stocking, and forecasting.

This free, interactive dashboard is powered by the Foureyes inventory dataset, which collects VIN-level merchandising data from over 20,000 U.S. franchise dealership websites. Through daily tracking of dealership websites, we can provide a reliable view of where inventory is tightening and where it remains steady. 

Whether you’re benchmarking inventory trends by brand, analyzing how used vehicles flow differently than new, or exploring which models are becoming harder to find, this dashboard puts the data at your fingertips.

Let’s walk through the page together, then cover the terms used in the dashboard and FAQs.

Total Inventory Availability

The top chart tracks total new and used inventory levels at U.S. franchise dealerships. You can use the filter to toggle between Condition (new and used) or Type (Car, Truck, SUV, Van). By default the chart is on Condition to help you spot differences in how availability shifts across new and used vehicles.

The filters below allow you to select brands. You can use the legend by clicking to select one brand, or clicking and holding Ctrl (Windows) or Command (Mac) to select multiple brands. Or you can use the dropdowns below the brand legend. If you want to look at a specific set of brands, this is the easier option. Just be sure to click apply. 

Any selections here filter the rest of the dashboard, so your analysis stays consistent throughout. The charts below will show details for up to five brands at a time. 

Brand-Level Insights

Below the availability chart, you’ll find New and Used Inventory by Brand with Relative Change Over Time charts. These highlight which brands have seen the largest declines or increases in inventory, and how their availability has shifted across years, going back to January 1, 2021. You can hover over any line at any point to see week-over-week, month-over-month, or year-over-year changes for that specific brand and point in time. 

This section is particularly useful for competitive benchmarking. For instance, if one brand’s new inventory has tightened significantly while others remain steady, it may indicate production or distribution challenges unique to that OEM.

Model-Level Insights

The last set of charts includes model-level insights. This section reveals which specific models are experiencing the steepest inventory declines. Tables highlight up to 10 models for both new and used inventory, sorted by greatest percentage decrease, year-over-year.

This view allows you to spot which models are becoming harder to find,  whether due to high consumer demand, reduced production, or both. For example, if a top-selling SUV shows sharp declines in both new and used availability, it can signal tightening supply across the entire ownership lifecycle.

Use the Peak Inventory controls to control the models you see. Larger sizes will enable you to focus on the highest volume models. Smaller sizes will show more models (up to 10). If the tables are empty, lower the thresholds. 

Toolbar and Usability Features

Along the bottom, a toolbar offers key functions to make analysis easier:

    • Undo or redo actions
    • Reset the view
    • Refresh data
    • Pause or replay animations
    • Download charts (Image, PDF, PowerPoint)
    • Enter full screen

These features ensure you can tailor the dashboard to your workflow, whether you’re pulling screenshots for a presentation or exploring trends week over week.

Glossary of Dashboard Terms

Total Inventory Availability: The number of vehicles currently listed at U.S. franchise dealerships, broken out by new and used.

Relative Change Over Time: An expression of increase or decrease in a quantity as a percentage of its starting value, providing a proportional comparison. It is calculated using the formula: Relative Change = ((New Value - Old Value) / Old Value) x 100%

Inventory by Brand: Breakdown of inventory levels for selected brands over specific time periods.

Inventory by Model: Breakdown of inventory levels for specific models, showing the steepest gains or losses over a given period.

Peak Inventory: The highest level of inventory recorded for a brand or model during the selected period, used to normalize comparisons.

Frequently Asked Questions

Q: Can I filter inventory by both brand and body type?

A: Yes. You can use the brand and type filters together to narrow down to segments like “Ford SUVs” or “Toyota trucks.”


Q: Why do some models show sharper inventory drops than others?

A: Drops often result from production shortages, higher demand, or strategic decisions by manufacturers to cut allocations.


Q: What does “relative change over time” mean in the charts?

A: It shows how inventory levels for a brand or model have shifted compared to their own baseline, highlighting proportional gains or losses.


Q: How do inventory shifts impact pricing and consumer behavior?

A: When inventory is scarce, prices generally rise and consumers may shift to alternative models, trims, or used options.


Q: How does this dashboard differ from your other dashboards?

A: This dashboard focuses on availability. That is to say, how many vehicles are on lots at any given time. Other dashboards from Foureyes focus on demand (the level of interest in new cars), new automotive sales (how many new cars are being purchased), and prices (how list prices change over time). 


Q: How often is the data updated?

A: The data is updated weekly, ensuring you always see the most current shifts.


Q: Is the underlying data set available?

A: Yes, the underlying Foureyes inventory dataset is available for purchase. Analysts often use it to support value forecasting, real-time market valuations, demand modeling, and tracking overall market health. More information is available here or contact us. 


Q: How far back in time does the underlying data set go? 

A: Foureyes has inventory history going back to January of 2020.


Q: Can I share insights from this dashboard?

A: Yes. You can cite the Foureyes U.S. Automotive Inventory Over Time Dashboard in your work, presentations, or media coverage. Please include a link back so readers can access the live dashboard. For media inquiries or comments from Foureyes, please contact us at [email protected].