Nissan's replacement for the D21 "Hardbody" was introduced in 1998 as the Frontier. Like the D21, it included a standard 2.4L 4-cylinder engine. But the market was demanding more options and more power, so the following year a 3.3L V6 was added. The year after that, Nissan made history in the US for offering the first compact pickup truck with 4 full doors. Other manufacturers would soon follow suit. The Frontier would soon gain a reputation for its surprising ruggedness and drivability; and when coupled with an affordable price tag, it makes for a very attractive proposition. Most Nissan Frontier pickups sold in the US are also built here, making sourcing Nissan Frontier parts very easy and keeping production affordable. One downside: they are no longer produced with a standard, 2-door only cab.