The primary measurement device of exhaust gases for the engine control computer in a car to determine if the fuel mixture is too rich or too lean. Oxygen (O2) sensors are used to achieve good fuel economy, low emissions, and good power.OCCUPANT CLASSIFICATION SYSTEM (OCS)
The Occupant Classification System detects the presence of a passenger in the front passenger's seat and turns off the front passenger's airbag under certain conditions. With OCS, if the front passenger seat is unoccupied or occupied by a passenger and the indicator displays: “PASSENGER AIRBAG OFF,” then the front passenger's airbags will be turned off and will not deploy in a frontal crash. If the “PASSENGER AIRBAG OFF” indicator is not illuminated, then the passenger's airbag will deploy in a frontal crash.
- NOTE: Luggage or other cargo should not be placed on the passenger front seat. This can allow the deployment of the front passenger and/or side air bag in the case of an accident.
- Even with OCS, a child restraint system must never be placed in the front seat; recommend to your customers that all children under age 13 should ride in the back seat.
A unit of measurement intended to indicate the tendency of fuel to detonate. The higher the rating, the greater the resistance to detonation by the fuel. Normally, higher performance engines require higher octanerated fuels.ODOMETER
An instrument that records the distance traveled. It is usually located near or below the speedometer.OEM
Original Equipment Manufacturer. Refers to the original manufacturer of the vehicle, i.e. Hyundai is considered to be an O.E.M.ONE-TOUCH AUTO-DOWN POWER WIDOWS
(See “AUTO-DOWN POWER WINDOWS”)OVERALL HEIGHT
(See “EXTERIOR DIMENSIONS”)OVERALL LENGTH
(See “EXTERIOR DIMENSIONS”)OVERALL WIDTH
(See “EXTERIOR DIMENSIONS”)OVERDRIVE
Overdrive is specialized gearing within a transmission that provides a final drive ratio of less than 1:1. This allows the driveshaft to rotate faster than the engine crankshaft. Normally engaged only at highway speeds, overdrive allows the engine to operate at lower RPM, providing enhanced fuel economy, quieter operation and minimizes wear-and-tear on the engine.OVERHEAD CAM (OHC)
The type of engine configuration in which the engine’s camshaft is mounted above the cylinder head(s). Overhead cam engines typically are lighter in weight, have fewer moving parts, and can run at higher RPM’s than engines using pushrod valvetrains.OVERHEAD VALVE (OHV)
An engine with both intake and exhaust valves placed directly over the piston.