543.03.0004 RENAULT TRUCKS Expansion Tank, Radiator

The 543.03.0004 expansion tank plays a critical role in the cooling system by managing coolant expansion and maintaining stable pressure within the radiator circuit. This heavy-duty grade component is essential for preventing overheating and ensuring the long-term reliability of the engine's thermal management system in heavy commercial vehicles.

543.03.0004 is the OE-equivalent expansion tank used in RENAULT TRUCKS C-series, K-series, and T-series, as well as VOLVO FH and B-series models. It is fully compatible with OEM part numbers 7421360161, 7421883431, 7422430044, 7422821832, 7423752085 (RENAULT TRUCKS), and 21360161, 21883433, 22430043, 22821826 (VOLVO).

Designed for professional workshop technicians, this part ensures a precise fit within the cooling assembly. Regular inspection of the expansion tank and its connections is recommended during standard service intervals to maintain optimal coolant levels and prevent system leaks or pressure issues in heavy-duty applications.

This component is specifically engineered for high-demand environments, providing stable performance for models such as VOLVO FH 480, FH 520, and RENAULT TRUCKS T-series trucks. It serves as a reliable replacement part to maintain fleet uptime and engine safety.