What is d21?

It is likely that you are referring to the D21 Nissan Navara, a pickup truck that was produced by the Japanese automaker Nissan from 1985 to 1997. The D21 was also known as the Nissan Hardbody in some markets. It was available with a range of engine options, including gasoline and diesel engines, and came in both two-wheel drive and four-wheel drive configurations. The D21 was known for its durability and reliability, making it a popular choice for both personal and commercial use. The truck had a simple and rugged design, with a focus on practicality and utility. Overall, the D21 Nissan Navara was a popular and successful model for Nissan during its production run.