A facelift in cars refers to a set of changes made to a vehicles styling during its production run, which retains the basic styling and platform of the car, with aesthetic alterations). The purpose of a facelift is to update the look of an existing car model to keep it up-to-date with the latest design trends and to increase interest and attract consumers. Facelifts are often done on models that are still popular and successful in the market, as car manufacturers want to maintain the attractiveness and relevance of those models. A facelift usually involves changes to the front fascia (grille, headlights), taillights, bumpers, instrument panel and center console, and various body or interior trim accessories). Mechanical changes may or may not occur concurrently with the facelift, such as changes to the engine, suspension, or transmission). The changes made in a facelift are usually concentrated in the exterior looks of a car, particularly the front and rear end designs, but can also include interior improvements, such as new trim and upholstery options, or even a new air vent design. A facelift is usually carried out around the middle of a cars life-cycle, which normally means about 3-4 years after it first came out, and a car model usually lasts about 7 years before being replaced by an all-new version.