Most experts, including those from AutoGuru , recommend replacing the water pump whenever you change the timing belt. Since the belt must be removed to access the pump anyway, doing both at once saves significantly on labour costs.
The water pump’s job is simple but vital: it circulates coolant to prevent your engine from melting. For many Renault models, the water pump is driven by the timing belt. When to Replace: renault pummp
The high-pressure fuel pump (often a Delphi or Bosch CP1/CP3 unit) pressurizes diesel fuel to over 1,600 bar (23,000 PSI) for the common rail injectors. Most experts, including those from AutoGuru , recommend