2017 Porsche 911 Depreciation

A 2017 Porsche 911 is typically worth around $121,183, with most listings falling between $90,210 and $160,773. The single biggest swing factor is mileage — listed examples average about 31,260 miles, and each additional 10,000 miles shaves a few percent off the price. Condition, accident history, trim, and how many owners a car has had move the number from there. Treat the median as a fair starting point and adjust up for a clean, low-mileage, one-owner car or down for higher mileage and any reported damage.

Our fitted model estimates about 25.2% depreciation for the 2017 Porsche 911 after normalizing listings for their MSRP reference, mileage, and age. The raw source median of $121,183 is at or above the roughly $110,300 median MSRP reference because the sample can mix expensive trims, options, unusually low-mileage cars, and dealer asking prices. The percentage is therefore not a direct subtraction of those two headline figures, and the spread is not evidence that a typical example appreciated. Compare the trim, original sticker, mileage, condition, and service history of any specific car before applying the model estimate.

Listed 2017 911s average about 31,260 miles, with most between 14,969 and 44,787. As a rule of thumb, "average" mileage for any car is roughly 12,000 miles per year of age, so compare a specific listing against that benchmark. A below-average odometer commands a premium and an above-average one a discount, but a higher-mileage car with complete service records and one owner can be a better buy than a low-mileage car with gaps in its history. Consistent maintenance does more for a car's remaining lifespan than a low number on the odometer alone.

For a 2017 Porsche 911, anything under $99,970 is a strong deal, $99,970 to $147,041 is the typical range where most cars trade, and above $147,041 is on the expensive side — those higher prices usually buy lower mileage, a certified warranty, or a premium trim. Always weigh the asking price against the car's specific mileage and condition rather than the sticker alone: a slightly higher price for a clean, one-owner, accident-free example is often money well spent. And treat a listing priced well below the range as a prompt to dig deeper — unusually cheap cars almost always have a reason, whether it's high mileage, accident history, or a branded title.