Here are the spare parts concerning the hydraulic part of the braking of your 4L. Namely, master cylinders, wheel cylinders, brake distributors. These parts, worn, can leak or seize on your Renault 4 and this can create an imbalance, loss of braking, premature degradation of the brake shoe linings of your R4. In order to find your way around better, we still advise you to use our classification by model by following this link: 4L brake spare parts classified by model.