E
E85
A fuel consisting of gasoline or another hydrocarbon mixed with up to 85% denatured ethanol.

Early termination
Ending a vehicle lease before its original term has expired.

Easy entry
A device that automatically retracts a vehicle's power seats and/or steering column when the engine is switched off.

EGR system
Exhaust Gas Recirculation system. A device that redirects a small amount of exhaust to the engine intake in an effort to lower combustion temperature and reduce the emission of nitrogen oxide.

Electric battery type
The type of battery used to power the electric motor in a hybrid or electric vehicle:  lead-acid, flooded, gel, lithium ion, absorbed glass mat, Zebra Na/NiCL2 or NiZn traction.

Electric motor performance
An electric vehicle's or hybrid vehicle's electric motor's ability to do work, expressed in terms of horsepower, torque or kilowatts.

Electric motor type
The type of electric motor in a hybrid or electric vehicle used to power the drive wheels: permanent magnet motor or other traction motor.

Electric vehicle
A vehicle that is run entirely on electricity, using batteries, capacitors and one or more traction drive systems.
 
Electrochromatic rearview mirror
A rearview mirror that automatically dims at night when it detects a bright glare.

Electronic brake force distribution
A feature of some antilock braking systems that proportions and applies brake force to each wheel independently.

Electronic stability control
See "Stability control."

Emergency brake assist
An electronically controlled system that maximizes brake efficiency during panic stops.

Emissions certification standards
Numerical limits on the pollutants produced by a vehicle established by the EPA and the California Air Resource Board.

Emissions hoses & tubes
Hoses and tubes utilized by any of a vehicle's emission control devices.

Emissions score
A score from zero to 10 given by the EPA to each new vehicle that represents the amount of total emissions produced during a laboratory driving simulation of the vehicle.

Emissions standards
The maximum allowable levels of NOx, carbon monoxide, nonmethane organic compounds and particulate matter permitted by EPA regulations to be emitted by each new vehicle.

Engine descriptor
A special notation attached to a vehicle's engine code in order to describe its emissions rating or its fuel economy, or that indicates that it can be run on multiple fuel sources.
 
Engine oil
A substance that lubricates and cools the moving parts of the engine and reduces corrosion and the formation of rust.

Engine oil level warning system
A device that automatically brings a low engine oil level to the attention of a driver.

Engine performance
An engine's ability to do work in terms of horsepower, torque or efficiency.

Engine size
A vehicle engine’s displacement, in liters (according to its manufacturer).

Engine thermostat
A device that senses the temperature of the engine coolant for the purpose of regulating the engine cooling system.

Entry lighting
A system of lights that aids a driver or passenger in entering a vehicle in the dark.

Environmental impact
An assessment of the biophysical effects a vehicle has on the environment, commencing with its production and ending with its disposal.

EPA fuel economy/MPG estimates
The city and highway fuel economy ratings issued by the EPA.

EPA interior volume
The amount of total space within the cabin of a vehicle as measured by the EPA.

EPA testing
Laboratory tests of new vehicles conducted by the EPA in controlled driving simulations, for the purpose of generating data on average fuel economy, air pollution and greenhouse gas production.
 
Equity
For a vehicle that has been financed through a loan, the difference at any time between what a vehicle is worth at that time and the amount that is then owed on the loan.

ESC
See "Stability control."

Estimated annual fuel costs
The estimated cost of fueling a vehicle over the course of a year, assuming 15,000 miles per year are driven and a price per gallon designated by the EPA.

Ethanol
Ethyl alcohol. A commonly used vehicle fuel.

EV
Electric vehicle.

Evaporative control canister
A device that captures raw fuel vapors (hydrocarbons) from a vehicle's fuel tank and carburetor bowl before they can escape into the air.

Evaporative control canister filter
A filter on the evaporative control canister that filters incoming air as fuel vapors contained in the canister are being drawn back into the engine.

Evaporative control system
An emission control system that prevents raw fuel vapors from entering the atmosphere.

Excess mileage penalty
A fee the lessee must pay when the allotted miles specified in the lease are exceeded. The fee is customarily $0.12-$0.25/mile in excess of the allotted miles.
 
Excess wear and tear
Wear or damage to a vehicle that is in excess of what is normally expected in the ordinary course of operating a leased vehicle.

Exhaust pressure regulator valve
A device that directs warm exhaust to a vehicle's intake in an effort to aid fuel vaporization and reduce warm-up time.

Extended warranty
A vehicle warranty sold by the manufacturer of the vehicle or a third party that extends the vehicle's basic warranty beyond its original period.

Exterior camera
A video camera mounted outside a vehicle that relays its signal to a monitor within the cabin.

Exterior mirrors adjustment type
The type of position adjustment control for the exterior mirrors: power, memory or manual.

External temperature display
The digital display of the ambient air temperature around a vehicle.