The Bosch 0445115007 is a highly common and significant fuel injector, specifically a Piezo inline injector used in many modern diesel engines.
Here’s a detailed breakdown of its key characteristics, applications, and important information.
Core Specifications & Technology
Manufacturer: Bosch
Type: Piezo-Crystal Actuated Inline Solenoid Injector (a later, more advanced version of the common rail "Solenoid" type).
Series: Part of the DSLA (Diesel Solenoid Linear Actuator) / Piezo inline family.
Key Feature: Uses a stack of piezoelectric crystals that expand almost instantly (microseconds) when voltage is applied. This allows for:
Extremely fast response times (up to 4x faster than traditional solenoid injectors).
Multiple, precise injection events per cycle (e.g., pilot, main, post injections).
Better fuel atomization, leading to improved power, fuel efficiency, and reduced emissions (soot and NOx).
Primary Applications (Vehicles)
This injector is found in a wide range of European diesel vehicles from the mid-2000s to early 2010s. Always cross-reference your engine number for absolute certainty.
The most notable application is in Volkswagen Group 2.0 TDI engines:
Volkswagen / Audi / Škoda / SEAT with the 2.0 TDI (CR) Common Rail engine, specifically the CBA, CBAA, CBBB, and similar engine codes.
Model Examples:
VW Golf, Jetta, Passat, Tiguan (~2008-2012)
Audi A3, A4, A5, A6, Q5 (~2008-2012)
Also used in some 1.6 TDI and 2.0 TDI engines from other manufacturers like Opel/Vauxhall and Ford.
Proper installation is critical for the longevity and performance of a modern fuel injector, especially a high-pressure piezo or solenoid type like the Bosch 0445115007. Failure to follow precautions can lead to immediate leaks, poor performance, or catastrophic engine damage.
Here is a comprehensive checklist of precautions, categorized by phase
Phase 1: Preparation & Safety
Work on a Cold Engine: Fuel systems, especially common rail, can retain extremely high pressure (over 1,500 bar / 22,000 psi). Allow the engine to cool completely to avoid burns and pressure release.
Depressurize the Fuel System:
Locate the fuel rail pressure sensor or a service port. Consult the service manual.
Disconnect the fuel pump control module or fuse to prevent the pump from priming.
Start the engine and let it run until it stalls from fuel starvation. Crank the engine for an additional 3-5 seconds to purge residual pressure.
Wrap rags around connections when loosening to catch any remaining fuel.
Disconnect the Battery: Prevent any accidental short circuits or activation of the fuel pump. Disconnect the negative terminal.
Impeccable Cleanliness: This is the #1 rule. Dirt is the enemy of the fuel system.
Clean the valve cover area around the injectors thoroughly before disassembly. Use brake cleaner and compressed air.
Work in a clean, dust-free environment as possible.
"The Five-Second Rule": If a new seal or a critical part touches anything unclean (your hand, the bench, the floor), it must be cleaned or replaced.
Where to buy:
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