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Porsche 911
2021 · gas
5 measured figures
5 of the 9 figures this market publishes for a car like this one are measured for this car. This market publishes no overall score, so there is no share of a composite weight to measure confidence against; figures_measured says how many of this market's figures the row carries, and contributing_publishers says who measured them

Measured figures

Fuel economy21 mpg (US gallons)Measured by EPA · configuration: 911 Carrera S
Tailpipe CO₂264 g/kmMeasured by EPA · CO₂ basis: tailpipe_rated · configuration: 911 Carrera S · also 425 g/mile
HorsepowerFree with an accountMeasured for this car, with its publisher and basis
WarrantyFree with an accountMeasured for this car, with its publisher and basis
Recall campaignsFree with an accountMeasured for this car, with its publisher and basis

3 more measured figures for this car — Horsepower, Warranty, Recall campaigns — each with the publisher that measured it and the basis it is on. Free to read with an account.

Figures this car does not carry

Fuel economy (MPGe)Not published for this carFuel economy (MPGe) is published for electric and hydrogen cars, whose economy is published as MPGe: energy converted at 33.7 kWh per gallon, not fuel burned; this car is not one of them, so the figure is not the same quantity for it
Tailpipe CO₂ (charge-weighted)Not published for this carthis car's CO₂ is published as the tailpipe rating for the car driven as rated on the test cycle (264 g/km), not as a composite weighted across electric and fuel-burning miles, so it is not the quantity this list orders. It is published as Tailpipe CO₂
Engine horsepowerNot published for this carNot published for this car. The record's own reason is free to read with an account.
Kerb weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
EPA test weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
NHTSA overall ratingNot published for this carNot published for this car. The record's own reason is free to read with an account.
Complaints per 10,000 builtNot published for this carNot published for this car. The record's own reason is free to read with an account.
PriceNot published for this carNot published for this car. The record's own reason is free to read with an account.

5-Year Running Costs

Fuel$14,191
Insurance$12,120 (modelled)
Maintenance$7,800 (class estimate)
Repairs$8,000 (modelled)
Depreciationnot estimated — we hold no purchase price for this car, and it is not assumed.
Totalnot estimated — a component above is unknown or modelled

Running costs only — the purchase price is not included. The five-year running cost is an ESTIMATE, not a measurement of this car: only its fuel half is computed from the car's own measured consumption and a dated pump price (see fuel_price_source and fuel_price_as_of in the market's own figures); insurance, maintenance and repairs are class models. It orders no list and is not one of this market's published figures. Fuel is this car's own combined consumption over 13,800 miles a year at $4.319 a US gallon of petrol (U.S. Energy Information Administration, Gasoline and Diesel Fuel Update: U.S. regular gasoline retail price, all formulations, weekly, 2026-09-14). Insurance, maintenance and repairs are models, not figures for this car: insurance from its power, weight and crash rating, maintenance from its make's class, repairs from its complaint and recall counts. They are shown for scale and are not used to rank it. Confidence is low: several components are modelled from class averages.

Known Issues

FUEL/PROPULSION SYSTEM
3 complaint(s) · 1 reports a crash, fire, injury or death
Two separate instances of fuel line failure and fuel leak in the engine compartment. The first in March 2024 and the second in September 2025. The situations both resulted in fuel leaking on top of th…
BACK OVER PREVENTION
1 complaint(s)
The contact owns a 2021 Porsche 911 Carrera S. The contact stated that while in reverse(R), the back over prevention camera displayed a distorted image, and failed to properly display the location and…
EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:STEERING
1 complaint(s)
2021 Porsche 911. Consumer writes in regards to missing computer chip for proper steering.
SEATS
1 complaint(s)
THE SEAT BACK RELEASE ON BOTH SEATS IS VERY HARD TO PULL. ON THE DRIVERS SIDE THE STRAP BROKE FREE WHILE ATTEMPTING TO EXIT AND THE SEAT WOULD NOT RELEASE. THIS COULD BE A SAFETY DANGER IN A CRASH WHE…

These complaints are filed under 911, 911 CARRERA S, names that include one NHTSA also uses for other versions of this car, so some may concern those versions.

Data sources