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Economic Indicators Influencing Auto Repair

Automotive technician independent automotive repair shop

Independent repair shop owners and tire dealers often have two prime factors guiding their business philosophies – where do the cars come from and where can I get the parts/tires? Taking a step back from the micro-level of analysis on how these questions affect you can often reveal some interesting facts about how they affect the industry.

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In June 2021, IHS Markit released its annual estimate of vehicles in operation and the age of those vehicles. One was a new record and one was a retreat.

The new record was set by the average age of light vehicles in operation. The IHS estimate for 2021 indicated an average vehicle age of 12.1 years, which is an increase of two months over last year’s forecast. The retreat was in Vehicles In Operation, or VIO. That number decreased from 281 million vehicles in 2020 to 279 million vehicles in 2021. According to IHS, that is the first decline in VIO since 2012.

Sales Slump

One easily measured economic time series can be cited as a culprit for both movements reported by IHS. That culprit is the decline in new vehicle sales in 2020. For the year, new auto and light truck sales were 14.436 million, the lowest level since 2012. Using an online database such as TrendLens from the Auto Care Association or FRED from the Federal Reserve Bank of St. Louis, we can track annual or monthly auto sales. While the final sales figure for 2020 probably exceeded many forecasts made at the beginning of the lockdown, nonetheless 2.5 million fewer new cars were added to the nation’s stockpile in 2020 than had been added in the previous five years. That will cause both a shortfall in VIO as well as an increase in the average age of the vehicles.


The shaded areas in Chart 2 indicate economic recessions. As you can see, the plunge in sales that occurred during the lockdown matched in-depth the plunge that happened during the Great Recession of 2008-2010. However, as soon as the lockdown ended sales snapped right back, unlike the Great Recession, when sales stayed low for many years. The Great Recession was caused by massive financial problems that started in the housing sector – thus, it took a long time to get right. The latest recession was caused by restraints put in place to meet a non-economic problem, and when those restraints came off, the economy wasted no time in coming back.

Economic recession great recession vs coronavirus

The Sweet Spot

Looking back at auto sales from years past also brings to light some good news for the aftermarket. Many industry observers cite something called the “aftermarket sweet spot” that is made up of vehicles that are variously described as six to ten or six to eleven years old. These are vehicles that are out of warranty, entering the time period where OE equipment needs replaced, and the vehicles are still young enough that the owners are going to do more than just the bare minimum to keep them on the road. The number of vehicles in the “sweet spot” today are the ones that were produced six to eleven years ago. Chart 3 is just the annual sales data we showed earlier, only the period of six to eleven years ago is highlighted in green. (Green happens to be the color of money, but that is just a coincidence.)

The automotive aftermarket sweep spot vehicle age

What this chart readily shows is that the number of vehicles in the “sweet spot” for the past couple of years has been heavily influenced by the new vehicle sales slump that occurred during the Great Recession. It was not until 2014 that new vehicle sales exceeded the level in 2007. After that, there were five years of very high new vehicle sales (2015-2020) that are just getting old enough to be in the “sweet spot.”

The “sweet spot” bottomed out in 2017-2018, as the full effect of the Great Recession sales slump took effect. But starting in 2019 and peaking in 2024, one by one those years of low sales will be replaced by years of high sales, and the number of vehicles in the “sweet spot” will grow. The drop in the maximum size of the “sweet spot” in 2025 is because of the drop in 2020 sales. Of course, anything beyond 2025 depends on future sales (So let us hope that the computer chip shortage is solved.).


Where The Parts Are

In 2021, Babcox Media conducted its biennial profile of independent repair facilities. Among the questions we ask in this survey “Where do you buy parts?” and “How do you buy parts?” This always provides interesting details of parts inventory and supply.

A key question that we ask in the survey is “Please think about all the replacement parts you order in a given month. How much do you estimate you are getting from each of the following sources?” while constraining their answers so that they sum to 100%. The results reveal that just under a half of their orders go to traditional program groups and slightly more than a quarter go to the retail chains. To see what respondents said, click here to read the full article from our sister brand, Shop Owner magazine

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