This 3773010-C6201 left rear combination lamp assembly is an original exterior lighting component for Dongfeng heavy trucks. It integrates multiple light sources including brake light, turn signal, reverse light and position marker light in one housing, providing clear warning and signal indication to vehicles behind during driving, braking, reversing and lane changing. The lamp housing adopts high-strength ABS plastic material with excellent anti-aging, impact-resistant and UV-resistant performance, adapting to long-term exposure under sun, rain, snow and muddy road conditions. The transparent lens uses polycarbonate material, featuring high light transmittance, scratch resistance and yellowing resistance to maintain stable lighting effect for a long time. Internal sealed waterproof structure prevents water and dust from entering, avoiding circuit short circuit and lamp failure. Precision molded mounting brackets and reserved wiring connectors ensure simple and quick installation. Every lamp assembly undergoes lighting brightness test, waterproof test and continuous aging test before delivery. It is a reliable replacement spare part for truck rear lighting overhaul.