Bosch DLLA143P93 Fuel Injector Nozzle

The Bosch DLLA143P93 is a precision-machined fuel injector nozzle designed for diesel fuel injection systems. It features a long-type nozzle body (DLLA designation) with a 143-degree spray angle optimized for direct injection combustion chambers. The nozzle is manufactured to OE specifications under part number 0433171089, ensuring exact fit and performance parity with original equipment. This component serves as the critical metering and atomization element within the fuel injector assembly. It is constructed from high-grade tool steel to withstand extreme injection pressures and thermal cycling inherent in heavy-duty diesel operation. The nozzle geometry corresponds to Bosch flow group 93, calibrated for specific fuel delivery rates required by the target engine platform. Primary application includes Volvo TD71 series engines installed in Volvo FL7 heavy-duty trucks (model years 1985-1994). The nozzle interfaces with the injector holder body and is secured via a retaining nut. Regular inspection of the needle lift and spray pattern is recommended during scheduled injector overhaul intervals to maintain combustion efficiency and emissions compliance.