Car brands come and go, but more so with individual models. American car manufacturers are often “disloyal” to certain models as evidenced by GM’s constant name changing when it comes to compact cars. The compact Vega gave way to the Cavalier which later became the Cobalt and is now sold as the Cruze worldwide.

Several models on the market as of 2011 will likely be pulled from the market in 2012 or 2013, some of which may be a big surprise to you. Let’s take a look at five car models, domestic as well as foreign, that are most vulnerable and likely to be terminated.

Buick Lucerne — This full size, front-wheel-drive five or six passenger sedan is based on a GM platform that dates back to the late 1980s. That in itself signals why the Buick Lucerne won’t be around much longer. Moreover, the brand has been given a new lease on life and is targeting up and coming professionals as its customers. That means the Lucerne just doesn’t fit the image of the new Buick. Look for the current Buick LaCrosse, a larger midsize model to take over the brand’s flagship sedan status and newer, smaller models such as the compact Verano to enter the line up.

Dodge Caliber — Following the eleven year run of the Neon, Chrysler decided to build this compact crossover-like vehicle. Although a capable performer, the Caliber never has stood out in a class of small cars. The most fuel efficient model is rated at 32 mpg which is far below the 40 mpg offered by the Hyundai Elantra. Chrysler will remedy the problem in 2012 when a Fiat-derived model replaces the Caliber. Much improved mpg is expected too, perhaps reaching 40 mpg.

Mazda 6 — Who would have thought that the sedan which spawned the popular Ford Fusion would go away? But, that’s something Mazda appears ready to do according to Automotive News. The Mazda6 is a slow seller and has been outflanked in a highly competitive segment dominated by the Toyota Corolla and Honda Accord and featuring new cars such as the Hyundai Sonata and Kia Optima. Mazda hasn’t signaled that the Mazda6′s plans are definitive, but the Japanese automaker reportedly would like to give up its Flat Rock, Mich. plant that it co-owns with the Ford Motor Company, quite possibly moving production to Mexico instead.

Mitsubishi Galant – Another midsize sedan that is vulnerable is the Mitsubishi Galant, a model that hasn’t been updated since 2004. Mitsubishi sales, which has fallen sharply in recent years are on the rebound, but the dated Galant is not leading the charge. This Japanese car manufacturer has a manufacturing plant in Normal, Ill., but will be introducing new models in 2012 before sealing the Galant’s fate. An updated Galant is possible, but likely will carry a new name if and when that vehicle debuts.

Subaru Tribeca — Originally called the B9 Tribeca, when this medium sized crossover made its debut in 2006, it featured a grille that was every bit as ugly as the Ford Edsel. Subaru eventually remedied the problem, but the Tribeca has never been a big seller for this Japanese automaker. In April 2011, Subaru recorded its best sales month ever in America, with 24,762 units sold, but only 241 Tribecas were included. Expect Subaru to concentrate on its Forester, Impreza, Legacy and Outback once it kills off the Tribeca.

Are other models vulnerable? Absolutely. Any car that doesn’t sell or isn’t updated will be removed from the market as automakers concentrate on selling cars that customers want and are profitable.