Vehicles using ZPJ4 engine list:

Engine ZPJ4, found in Citroen XM V6-24 and Peugeot 605 3.0 V6 24V, commonly faces timing belt wear and coolant leaks. Regularly inspect and replace the timing belt every 60,000-80,000 km to prevent catastrophic engine damage. Coolant leaks often arise from aging hoses or the water pump; check for dampness or overheating signs and replace faulty components promptly. Valve cover gasket leaks are also frequent; inspect for oil seepage and replace gaskets as needed. Maintaining proper oil levels and using quality coolant helps prolong engine life. Early diagnosis via visual checks and listening for unusual noises can prevent costly repairs.