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|Often must be ordered with power rear side windows, if these are available.
|Enter and start the vehicle without removing the key from your pocket.
|Unlock and lock the car using buttons on the keyfob.
|Brakes, Airbags, and Other Safety
|Rear disc brakes.
|Only listed when pricing a single model because insufficient data for all cars.
|Automatically pulse the brakes in hard stops to prevent wheels from locking up, making it possible to brake and steer at the same time.
|When a panic stop is sensed, fully applies the brakes.
|Applies the brakes to a slipping drive wheel to transfer torque to the other side, simulating the effect of a limited-slip differential. We haven't identified all applications, often implied by traction control.
|Mandatory, in all cars.
|Rearview camera connected to display screen on the instrument panel. Often requires navigation system.
|Deploys extended duration side curtain airbags when the vehicle rolls over. Usually included on tall vehicles. Rare on others.
|Airbags contained just above the window level. Except in cars without a rear seat usually cover first and second row.
|Selectively applies the brakes to prevent excessive understeer or oversteer (spinning).
|Two types: a warning light when a tire is low on air and a pressure readout for each tire.
|When a drive wheel slips, it is braked and/or engine power is reduced, restoring traction.
|Automatically applies a front brake to counteract sway induced by a trailer.
|Requires roof rails. Together constitute a roof rack.
|Large storage area beneath the load floor, often compartmentalized.
|Includes four-wire harness, limited to relatively small trailers.
|Filters exterior air before it enters the passenger compartment. No default value because most cars have them, even in cases where they're not in the official list of features.
|Vents at aft end of center console, in B-pillars, and/or in ceiling.
|Ducts under front seats direct heated air to the second row.
|Time between wipes can be precisely adjusted.
|Protective cladding extending partly onto the doors.
|Increasingly often these are not actually connected to the exhaust.
|Only listed if a second, smaller spoiler is also standard or optional. No additional value because no way to compare across models.
|Flaps mounted behind two to four wheels, to protect the body from mud and rocks.
|Can be small lip spoiler or a larger raised spoiler.
|Extensions to the wheel opening, both decorative and protective.
|Requires compatible Android phone.
|Touchscreen and/or voice control over apps that can include online search, Facebook, Twitter, Pandora, OpenTable, and MovieTickets.com. Requires connected compatible phone. Fees may apply after first three years.
|Requires compatible Apple iPhone.
|Jack for an iPod or similar device. No value because of incomplete data. Will soon be standard on nearly every car.
|Uses Bluetooth rather than a cable to integrate audio device. Requires compatible audio device and/or phone.
|Enables hands-free communication by wirelessly connecting a cell phone to a microphone and the vehicle's stereo speakers.
|High-definition radio, which broadcasts a digital signal. Free, no subscription fees.
|Integrates an iPod with the vehicle's controls and speakers. Usually included if there is a USB port, but can also rely on a proprietary port.
|Mirrors a phone's display on the car's infotainment display. Permits interaction with approved apps.
|Audio system capable of playing discs with MP3 files.
|XM or Sirius. Includes a subscription for three to six months, after which monthly fees apply.
|SD, CF, PCMCIA, or other digital media reader.
|Converts text messages to speech.
|Often permits an iPod or phone to be integrated into the vehicle's entertainment system and controls.
|Sometimes also includes voice control over climate control system.
|Instruments, Lights, and Mirrors
|Interior rearview mirror automatically dims when hit by headlights of following vehicle.
|We haven't given this feature a value because it's hard to tell which cars have it.
|Clears ice and fog from mirrors.
|Includes value of non-illuminated vanity mirror.
|Includes value of non-illuminated vanity mirror.
|Front row reading lights.
|Includes value of manual remote mirrors.
|Reports engine speed.
|Reports average fuel economy, and perhaps also instantaneous fuel economy, distance to empty, average speed, and other stats.
|Seats and Interior Trim
|Seat folds to enlarge cargo area. Unless the seat is also removable, it usually folds flat or nearly flat.
|Seat adjusts back and forth to vary the split between the second row and the third row or cargo area.
|Manually adjustable lower back support.
|Suspension, Wheels, and Tires
|Lug nuts that can only be removed using a special key. Prevents theft of wheels.
|Audio controls on steering wheel
|Leather-wrapped steering wheel
|Apple CarPlay support
|Android Auto support
|SMS text-to-speech reader
|Voice control for audio system