Nissan Sunny car, car model 2021, engine up to 20 thousand

Nissan Sunny car, model 2021, transmission has an issue with the transmission sensor, replacement cost approximately 300 riyals, I hereby clear my responsibility, and the engine knocks on both right and left sides, needs maintenance. The engine is mounted on a stand due to the presence of a second engine. The knocking started the day it arrived, and I ceased using it for my safety and the safety of others. Engine sold as seen, up to 20 thousand, non-negotiable. I set a price pleasing to both parties, and may God provide for everyone