BLLA 160 P 2176

BOSCH INJECTOR NOZZLE: DLLA160P2176 – FULL SPECIFICATION

I. Key Identification & Compatible Injectors

Nozzle (Injector Tip) P/N: DLLA160P2176
BOSCH MEC / Catalog Number: 433172176
System Manufacturer: BOSCH Common Rail Diesel Injection System.

Compatible Injector Assembly P/N(s):
- BOSCH Injector Reference: 0 445 110 616
- OEM / Vehicle Manufacturer: BMW
Typical Applications:
• BMW 3-Series (330d / 325d depending on variant)
• BMW 5-Series (530d / 525d)
• BMW X3 / X5 3.0d
• Other models with N57 / N57N / N57S common-rail diesel engines

II. Vehicle / Engine Application & Technical Data

Primary Vehicle Application: BMW 2.5d & 3.0d common-rail diesel passenger vehicles.
Engine Type: Inline-6 N57 family diesel engines (Euro 4 / Euro 5).
Injector Technology: BOSCH Solenoid-Type Common Rail Injector.
Nozzle Type: DLLA160P2176 — high-precision multi-hole nozzle designed for high-pressure, clean combustion systems.
Technical Characteristics:
- Number of Holes: 6–7 (engine-dependent)
- Hole Diameter: ~0.115–0.135 mm
- Spray Angle: 160°
- Operating Pressure: 1600–1850 bar (peaks up to 2000 bar)
- Material: High-strength heat-treated tool steel with anti-wear coating
- Fuel Compatibility: EN 590 Diesel / Biodiesel B7
- Emission Compliance: Euro 4 / Euro 5 (depending on engine version)
- Performance Features: Improved fuel atomization, optimized low-NOx burn, smoother idle, reduced diesel knock.
Common Fault Symptoms:
- Hard cold start / long crank
- Rough idle or knocking noise
- Loss of power at mid & high RPM
- White or black smoke
- High return flow / injector imbalance (cylinder correction values)

III. Critical Technician Notes (MUST-DO)

1. Injector Coding: After nozzle or injector replacement, perform IMA coding via BMW ISTA or equivalent tool.
2. Sealing Components: Always replace copper washers and O-rings; never reuse worn seals.
3. Injector Bolts: Use new clamp/stretch bolts; follow OEM torque-angle specs strictly.
4. Clean Installation: Maintain absolute cleanliness. BMW N57 injectors are very sensitive to dirt and water.
5. System Verification: Perform leak-back test, rail pressure stability check, pilot injection calibration, and smooth-running test.
6. Fuel System Notes: Replace fuel filter during service; verify no water contamination in the system.
7. Seat Reconditioning: Clean or reface injector seat if carbon buildup is present to avoid blow-by, misfire, and compression leakage.