How Often Should the High-Pressure Fuel Pump Be Replaced?

[GabrielLynn]

In fact, the service life of a fuel pump is much longer than we imagine. Under normal usage conditions, a fuel pump can easily last up to 100,000 kilometers. As for how often it should be replaced, neither the 4S dealerships nor the manufacturers specify a fixed replacement interval. In practical use, the principle of replacing it when it fails is sufficient. Below is some relevant information: 1. Symptoms of Failure: The symptoms of a high-pressure fuel pump failure are similar to those of a regular fuel pump, including severe shaking, poor acceleration, unstable idling, difficulty starting, and even stalling. Both the fuel pump and high-pressure fuel pump can fail, but the probability of failure is relatively low. With proper usage, they can last well beyond 100,000 kilometers without issues. 2. Working Principle: The high-pressure fuel pump is an additional pump in direct-injection engines. Unlike regular fuel pumps, it is not installed inside the fuel tank and does not rely on electronic drive. The high-pressure fuel pump is usually located in the engine compartment. Direct-injection engines require higher fuel pressure to ensure precise fuel injection, which is why the high-pressure fuel pump was developed.