Original BOGAP Coolant Return Line (Zyl.
4–6) 11537563707 / B4229131

Ensure efficient heat dissipation with this Original BOGAP Coolant Return Line for Cylinders 4–6, designed to route coolant safely away from the engine's hot zones. Manufactured to factory specifications, it provides a precise fit, high thermal resistance, and leak-free performance under pressure. Ideal for maintaining balanced engine temperatures and protecting your BMW’s cooling system during demanding operation.