0445120164

The 0445120164 is engineered for the Yuchai YC6JA / YC6J 6-cylinder heavy-duty diesel platform (6.87-6.9 L displacement, 132-191 kW / 180-260 hp, 105x125 mm bore/stroke). The Bosch F00RJ02806 control valve combined with the DLLA150P1827+ nozzle (OE 0 433 172 115 / 0433172115) makes it the standard fitment for Euro III and Euro V YC6JA-series applications. Confirm by the engine build plate code (e.g. YC6JA180-30 = 132 kW Euro III; YC6JA240-50 = 177 kW Euro V with SCR) before ordering. Cross-referenced by auto1998.cn, crdiparts.com, chinax.com, com-rail.com, abosedediesel.com (5+ independent sources).

No, they are NOT the same injector - but they share the same control-valve group (F00RJ02806) and the same nozzle (DLLA150P1827+). 0445120164 and 0445120293 carry distinct IMA calibration codes stamped on the solenoid body, and are mapped to different Yuchai YC6JA engine build-plate variants. The 0445120293 is sometimes listed alongside 0445120164 as a 'cross-reference' on Chinese aftermarket sites (asinttodiesel.com, chinax.com, autoplansearch.com), but Bosch OEM documentation treats them as separate part numbers. Order by the exact OE stamped on the failed injector and verify IMA via OEM-level diagnostic tools (Bosch ESI[tronic] 2.0 or Yuchai dealer tool) before installation.

The control valve is F00RJ02806 (solenoid-actuated, pilot + main metering, designed for 1600 bar peak rail pressure) and the nozzle is DLLA150P1827+ (Bosch OE stamping 0 433 172 115 / 0433172115, multi-hole, high-pressure common rail class). Both are confirmed by 5+ independent aftermarket sources (auto1998.cn, crdiparts.com, chinax.com, com-rail.com, abosedediesel.com) cross-referencing the 0445120164 part number. Always verify by the part numbers stamped on the solenoid cap and nozzle body side of the existing injector before ordering replacement parts.

No. The 0445120164 is mapped specifically to Yuchai YC6JA / YC6J engines (6.87-6.9 L). Per the tuifa.cn Chinese cross-reference table, the same F00RJ02806 control valve also fits 0445120156 (YC6L bus / Golden Dragon) and 0445120165 (YC6J Euro IV), but each SKU has its own nozzle and IMA calibration. For the larger YC6L (8.4 L) bus platforms use 0445120156 (DLLA different); for YC6M use 0445120160 (different F00RJ02035 valve). For Cummins ISDe (6.7 L) use a separate Bosch PN (e.g. 0445120123 / 0445120124). Do not cross-install the 0445120164 on these larger or smaller displacement engines - IMA mismatch will trigger fault codes and emissions failure.

Common failure symptoms on Yuchai YC6JA / YC6J engines: (1) Yuchai diagnostic fault codes P0201-P0206 (single-cylinder solenoid open circuit - wiring or coil failure), P2146/P2147/P2148 (COM1 group 1-3 cylinder, open/short to ground/short to power), or P2149/P2150/P2151 (COM2 group 4-6 cylinder); (2) excessive injector return flow > 100 mL/min at idle (spec target typically < 30 mL/min @ 800 bar for the Bosch 0445 family); (3) rough idle, hard cold start, power loss, increased fuel consumption, black smoke under load (per CSDN 2024 YC6J220-30 field case - root cause was oil-supply problem that overworked the injectors); (4) hard starting with no smoke (F00RJ02806 valve ball deformed, often due to shock-loaded installation). A documented 2021 Yuchai case (diklearn.com) shows a YC6J220-30 truck with speed limiting at 1700 RPM caused by injector wiring harness short (fault codes 322/324) - verify the harness AND the injector before condemning either. Always run a leak-back test (Bosch DCI 200 or EPS200A test bench) before condemning the injectors themselves.

Bosch common rail standard torque values: high-pressure fuel line nut 25-30 N·m (use a dedicated 17 mm flare nut wrench, no impact wrench); injector hold-down clamp 20 N·m + 90° angle (Bosch CRIN2 family standard; verify per Yuchai workshop manual - Yuchai-specific values may differ); return-pipe banjo 9-12 N·m with NEW sealing washers. Verify injector protrusion height 2.5-4.0 mm with a dial gauge (Bosch 0986850140) and shim accordingly. Lubricate O-rings with clean diesel or Bosch G 052 195 A1 grease. After running to operating temperature and cooling 15 minutes, re-torque the hold-down clamp and return-pipe banjo - thermal cycling can relax clamping force 5-10 %.

Yes. The 0445120164 is a complete solenoid common rail injector assembly with cylinder-specific IMA (Injector Modification Adjustment) calibration values stored in the ECU. After installation, the new injectors must be coded to the ECU using OEM-level diagnostic tools (Bosch ESI[tronic] 2.0, Yuchai dealer diagnostic tool, or compatible aftermarket scanner). Mechanical nozzle-only replacement does not apply here - the 0445120164 is a complete injector assembly, not a nozzle element, so IMA coding via diagnostic equipment is mandatory. Wrong IMA code results in over-fueling or under-fueling per cylinder, triggering fault codes (P0201-P0206, P1225 multi-cylinder) and emissions failure.

12 months typical for aftermarket replacement (per asinttodiesel.com, chinax.com, cautop.com - three independent Chinese suppliers). OEM warranty follows vehicle terms. The 12-month coverage applies to manufacturing defects and premature failure under normal operating conditions. Warranty typically does NOT cover: (1) failure due to contaminated fuel (water, debris, algae) - replace primary + secondary filters; (2) cross-installation on non-YC6JA / non-YC6J engines (e.g. YC6L, YC6M, Cummins ISDe) - IMA mismatch is not a warranty defect; (3) installation damage from improper HP line torque or impact-wrench use on the F00RJ02806 valve; (4) cross-reference to 0445120293 or other F00RJ02806 sister SKUs without verifying IMA code. Always purchase from a reputable supplier that can provide batch traceability (laser-etched markings) and test documentation per Bosch Mobility end-of-line standards.

The most common ordering mistake is confusing 0445120164 with 0445120293 - they share the same control valve (F00RJ02806) and nozzle (DLLA150P1827+) but carry different IMA calibration codes and are mapped to different Yuchai YC6JA build-plate variants. Other frequent mistakes: (1) ordering a 0445120156 (YC6L 8.4 L bus) by mistake - same control valve but different engine family, NOT interchangeable on YC6JA; (2) ordering a 0445120160 (YC6M bus, F00RJ02035 valve) or 0445120163 (YC6G bus, F00RJ01692 valve) - different control valve, different wiring harness; (3) assuming the 0445120164 fits Cummins ISDe (6.7 L) - that's a different Bosch PN (0445120123 / 0445120124); (4) not specifying the engine build-plate code (e.g. YC6JA180-30 vs YC6JA240-50) when ordering, which prevents the supplier from cross-referencing the correct IMA calibration. Always verify by the stamped OE on the failed injector AND the engine build plate before ordering.