Nissan Frontier 2WD is a mid-size pickup truck sold by the Japanese automaker Nissan. It was introduced in 1998 and is still in production. The Frontier 2WD is available in several trim levels, including the S, SV, SL, and Pro-4X. It is available with either a 4-cylinder or V6 engine, and it can be had with either rear- or four-wheel drive.