Injector nozzle BLLA 163 P 2291+ - DLLA163P2291

BOSCH INJECTOR NOZZLE: DLLA163P2291 – FULL SPECIFICATION

I. Key Identification & Compatible Injectors

Nozzle (Injector Tip) P/N: DLLA163P2291
BOSCH MEC / Catalog Number: 433172291
System Manufacturer: BOSCH Common Rail Diesel Injection System.

Compatible Injector Assembly P/N(s):
- BOSCH Injector Reference: 0 445 110 476
- OEM / Vehicle Manufacturer: AUDI / SEAT / VW / SKODA
Typical Applications (with HP / kW):
• Audi A4 2.0 TDI (2016–2020) – 150 HP / 110 kW
• Audi A5 2.0 TDI (2017–2020) – 150 HP / 110 kW
• VW Passat 2.0 TDI (2015–2020) – 150 HP / 110 kW
• VW Tiguan 2.0 TDI (2016–2021) – 150 HP / 110 kW
• SEAT Leon 2.0 TDI (2016–2020) – 150 HP / 110 kW
• SEAT Ateca 2.0 TDI (2017–2021) – 150 HP / 110 kW
• Skoda Octavia 2.0 TDI (2016–2021) – 150 HP / 110 kW
• Skoda Kodiaq 2.0 TDI (2017–2021) – 150 HP / 110 kW

II. Vehicle / Engine Application & Technical Data

Primary Vehicle Application: 2.0 L Common Rail Diesel engines in VW Group passenger cars and SUVs.
Engine Type: 2.0 L inline-4 TDI, Euro 5 / Euro 6 compliant.
Injector Technology: BOSCH Solenoid-Type Common Rail Injector.
Nozzle Type: DLLA163P2291 — precision multi-hole nozzle for high-pressure injection.
Technical Characteristics:
- Number of Holes: ~7
- Hole Diameter: ~0.163 mm (per aftermarket spec)
- Spray Angle: 163°
- Operating Pressure: 1600–1800 bar typical
- Material: High-strength, heat-treated tool steel
- Fuel Compatibility: EN 590 Diesel / Biodiesel blends up to B7
- Performance Features: Optimized for atomization, low emissions, efficient combustion, and longevity

III. Critical Technician Notes (MUST-DO)

1. Clean Installation: Clean the nozzle thoroughly (ultrasonic cleaning recommended) before fitting.
2. Sealing Components: Always replace copper washers, O-rings, and seals.
3. Injector Mounting: Follow OEM torque and alignment specifications.
4. Post‑Installation Testing: Perform leak-back and test-bench spray checks to verify correct spray pattern and absence of leaks.
5. Calibration / Coding: Use VW / Audi / Seat / Skoda diagnostic tools for injector coding if required.
6. Fuel Quality Notes: Use clean, high-quality diesel; replace filters during injector service.
7. Storage & Handling: Store nozzles in a clean, dry environment; avoid mechanical damage.
8. Performance Monitoring: Observe injector performance after replacement (idle smoothness, power, smoke, fuel return flow) to catch early issues.
9. Common Fault Symptoms: Rough idle, hard cold start, reduced power, black smoke, or excessive fuel return flow.