The Bosch CB18 0445025084 high-pressure pump is a second-generation common rail system designed for light commercial and off-highway diesel engines. It operates at 1,400–1,600 bar and uses an in-line twin-plunger design for stable rail pressure and reliable fuel delivery.
Unlike CP-type pumps, CB18 uses an engine oil lubrication system, improving durability in low-quality diesel environments. It is widely used in engines from JMC, Yuchai, Great Wall, Yunnei, and Foton, mainly in pickups, trucks, and industrial equipment.
Compared to CP3 systems, CB18 focuses more on fuel tolerance and cost efficiency than maximum pressure output.
Common issues include hard starting, power loss, and unstable rail pressure, often linked to MPROP valve sticking or fuel contamination.