Bosch DLLA142P221 Injector Nozzle

The Bosch DLLA142P221 is a P-type mechanical injector nozzle designed for Scania DS9 series heavy-duty diesel engines. Stamped with DLLA142P221 and cross-referenced to Bosch OE number 0 433 171 180, this nozzle features a 142-degree spray angle for optimal fuel distribution in direct injection combustion chambers. Constructed from high-speed tool steel (W6Mo5Cr4V2) with vacuum hardening heat treatment achieving 62-65 HRC hardness, the nozzle needle and body are precision-lapped as a matched pair to maintain sealing integrity under high injection pressures. The component serves as a critical wear item in mechanical fuel injection systems requiring periodic replacement to maintain emission compliance and engine performance.