Toyota’s 19.7% Chance of Reaching 250,000 Miles Dwarfs Subaru’s 2.8%

Toyota and Subaru sit close together in some conventional reliability rankings, but they are far apart in a new estimate of extreme vehicle longevity. An iSeeCars analysis of more than 395 million vehicles gave Toyota a 19.7% chance of reaching at least 250,000 miles, compared with 2.8% for Subaru.

That placed Toyota first among 33 brands and Subaru 14th. The overall industry estimate was 5.4%, meaning Toyota’s probability was about 3.7 times the average. Subaru’s result was roughly half the average, despite another ranking cited in connection with the analysis placing Toyota first and Subaru second for predicted reliability.

Longevity and reliability measure different outcomes

The apparent contradiction is largely a matter of definitions. Predicted-reliability ratings generally assess the frequency and severity of problems owners report. The iSeeCars calculation instead estimates the probability that a vehicle will remain in use long enough to accumulate 250,000 miles.

A vehicle can therefore reach the quarter-million-mile threshold after requiring repairs, replacement components and substantial scheduled maintenance. Conversely, a vehicle may be relatively trouble-free during a shorter ownership period but never accumulate unusually high mileage. The 19.7% figure does not mean a Toyota has a nearly one-in-five chance of covering 250,000 miles without repairs.

The threshold itself is demanding. Even the industry-wide estimate was only 5.4%, and just five brands finished above that benchmark. Lexus ranked second at 14.4%, Honda third at 13.3% and Acura fourth at 9.5%. Those results put Japanese automakers in the first four positions, but they do not establish that nationality alone explains longevity.

How the brand probabilities were constructed

Rather than simply counting vehicles already showing 250,000 miles, iSeeCars calculated average odometer readings at each annual vehicle age. It then applied a proprietary model to estimate the probability that vehicles would survive to different mileage thresholds.

The calculation was first performed for individual models and generations. Those results were then averaged across each manufacturer’s lineup, weighted by how common each model was on the road. Heavy-duty vans and models without sufficient data were excluded.

This method matters because the headline percentages are modeled brand-level probabilities, not direct forecasts for every vehicle carrying the badge. Weighting by prevalence means common models influence a brand’s number more heavily than uncommon ones. It also means two brands with different mixes of vehicle types, generations, annual mileage and usage patterns are not being compared as if they sold identical products into identical operating conditions.

Toyota’s lineup includes body-on-frame vehicles such as the Tacoma, Tundra and 4Runner. Those models may be relevant when examining the company’s overall product mix, but the analysis does not demonstrate that they caused Toyota’s first-place result. Establishing that connection would require model-level results and controls for age, use, maintenance and retirement patterns beyond the brand ranking presented here.

A probability is not an individual vehicle diagnosis

For owners considering longer holding periods, the study provides useful context about how frequently a brand’s vehicles are estimated to reach an exceptional mileage marker. It cannot determine whether a particular Toyota or Subaru will do so, nor does it quantify the repair expense required along the way.

Individual outcomes still depend on factors hidden by a brand average: model generation, powertrain, driving environment, annual use, collision history, corrosion exposure and whether required service was completed. A comprehensive service history consequently remains essential when evaluating a high-mileage vehicle. Inspection of the specific vehicle is more relevant to its present mechanical condition than a broad ranking by itself.

The Toyota–Subaru gap remains notable precisely because both brands can perform strongly under a different definition of reliability. At 250,000 miles, however, iSeeCars’ model produced a much narrower result: 19.7% for Toyota, 2.8% for Subaru and only 5.4% for the industry overall.

By Thomas Caldwell — AMI’s senior editor for mechanical and mobility engineering, covering vehicle electronics, systems integration, electrification, chassis systems, propulsion, and safety policy.