Citroen C4 Engine Problems

I would strongly recommend that you go ahead and replace the belt, as belts do deteriorate and stretch, even in what appears to be a short time. If you don't and it breaks you run the risk of major engine damage in the worst case, or at the very least being left stranded on the side of the road.

Problems don't fix themselves, you had a problem and I'm guessing you still have it after replacing the faulty sensor. I would have the car checked again in an effort to trace the cause of the problem.

Were you told why the first engine failed? It’s most unusual for an engine to fail at such low kilometres, and to have it happen again is unbelievable. If the engine has failed again and needs to be replaced Citroen should do it under warranty, which should still be current. If they don’t then go to the ACCC for help, or take your claim to VCAT.

You can use 91-octane unleaded petrol, but to get the best performance and lowest fuel consumption it’s recommended that you use 95-octane Premium unleaded.