Genuine BOSCH Fuel Accumulator
Part number 0438170004

A fuel accumulator is a crucial component of modern fuel systems. Its primary function is to maintain fuel pressure in the system. This is accomplished by storing pressurized fuel, which is then released when needed, ensuring a constant flow of fuel to the engine. Without a fuel accumulator, fluctuations in fuel pressure can cause stalling, inefficient operation and may even damage the engine. As such, the fuel accumulator is a vital component in ensuring the reliable and efficient operation of your vehicle.

The fuel accumulator works by utilizing a diaphragm that separates the fuel from the pressurized gas (usually nitrogen). As the fuel pump delivers fuel through the system, the diaphragm flexes and compresses the gas, storing energy that can be released later when needed. This stored energy can then be released during sudden fuel demands, such as acceleration, to maintain a stable fuel pressure. Overall, the fuel accumulator is a key component in modern fuel systems, responsible for ensuring the reliable and efficient operation of your vehicle.