The Bosch 0445110369 is a very common and critical fuel injector used in several Volkswagen Group 2.0 TDI engines.

Here’s a comprehensive breakdown of its application, key features, and important considerations.

Core Application

This injector is designed for the first-generation Bosch CRS 2.0 Common Rail System. It's primarily found in the following vehicles with the 2.0 TDI (CR) engine, 110 kW (140 HP) and similar variants:

• ŠKODA Octavia (1Z3) - As you specified, for the 2.0 TDI 110kW.

• AUDI A3 (8P)

• AUDI A4 (8E, B7)

• AUDI A6 (4F, C6)

• VOLKSWAGEN Golf V (1K), Golf VI (5K)

• VOLKSWAGEN Passat (3C, B6)

• VOLKSWAGEN Tiguan (5N)

• SEAT Altea, León (1P)

• VOLKSWAGEN Transporter T5

Engine Codes: This injector is typically used in engines like the BKD, BMN, CBAA, CBBB, and several others from the 2.0 TDI family circa 2004-2010.

Key Features & Specifications (Bosch Nozzle DSLA 150 P 1636)

• Type: Solenoid-operated Common Rail injector.

• Nozzle: The associated nozzle is a key service part, often referenced as DSLA 150 P 1636.

• Pressure: Designed for the high pressures of common rail systems (up to 1600 bar+).

• Electrical Connector: Specific 2-pin connector compatible with the engine's wiring harness.

  
  

The Bosch 0445110369 fuel injector represents a specific generation of common rail technology that brought significant advancements. Its structural characteristics are directly linked to its performance advantages and the requirements of early high-pressure common rail diesel engines.

• Here’s a breakdown of its structural characteristics and the resulting advantages.

  1. Structural Characteristics

  This injector is a Solenoid-Valve Controlled Common Rail Injector from Bosch's first-generation CRS system. Its structure can be broken down into key subsystems:

  A. Nozzle Assembly (The Business End)

  Nozzle Type: It uses a sac-hole nozzle (DSLA 150 P 1636). The fuel is delivered through tiny, laser-drilled holes (typically 5-7 holes) at the very tip. The "sac" is a small chamber just above these holes.

  Needle Valve: A precisely lapped needle, held shut by a spring and fuel pressure, sits against the nozzle seat. It lifts to allow fuel injection.

  Material: Made from ultra-hard, wear-resistant tool steel to withstand extreme pressures and cavitation erosion.

  B. Hydraulic Servo-System (The Amplifier)

  This is the core intelligent mechanism. It uses a two-pressure chamber system:

  Control Chamber: Located above the nozzle needle.

  High-Pressure Chamber: Feeds fuel to the nozzle.

  A small control plunger is linked to the nozzle needle.

  A solenoid valve at the top does not directly move the heavy needle. Instead, it controls a small, fast-acting pilot valve that bleeds pressure from the control chamber.

  C. Solenoid Actuator

  A high-power electromagnetic solenoid is mounted at the top of the injector.

  It operates the 3-way/2-way pilot valve that directs fuel flow to the control chamber.

  Designed for extremely fast response times (activation in less than a millisecond).

  D. Integral Design

  The entire assembly—solenoid, hydraulic servo, and nozzle—is housed in a single, robust steel body. This makes it a compact, direct-installation unit into the cylinder head.

The Bosch 0445110369 injector is a masterpiece of precision mechanical and hydraulic engineering. Its key structural advantage is the separation of force generation (common rail) from injection control (solenoid & hydraulic servo), combined with electronic flexibility. This allowed for the high pressure, multiple injections, and precise timing needed to make diesel engines of its era simultaneously more powerful, efficient, refined, and cleaner than ever before. It set the standard for modern diesel fuel injection systems.

Where to buy:

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