Bosch diesel injectors are widely used across modern diesel engines, powering vehicles from manufacturers such as BMW, Mercedes-Benz, Volkswagen, Audi, Ford, Peugeot, Citroën, Volvo, and many others. Understanding Bosch injector part numbers is essential when diagnosing injector faults, replacing a failed unit, or choosing between a new or reconditioned injector.
This page provides a comprehensive Bosch injector part number lookup, explains how Bosch part numbers are structured, and helps you identify correct injector compatibility for your vehicle.
What Is a Bosch Injector Part Number?
A Bosch injector part number uniquely identifies the injector’s design, pressure rating, control type, and compatibility. The most common Bosch diesel injector numbers begin with:
- 0445110* – Solenoid-controlled common rail injectors
- 0445115* – High-performance or later-generation solenoid injectors
- 0445116* – Piezoelectric injectors (Euro 5 / Euro 6)
- 043219* – Older mechanical or unit injector components
Each number corresponds to a specific injector configuration and must match exactly when replacing or reconditioning an injector.
How to Read Bosch Injector Part Numbers
A typical Bosch injector part number looks like this:
Bosch 0445110239
- 0445 – Bosch common rail injector family
- 110 – Injector series
- 239 – Unique configuration and calibration
Even injectors that look identical may have different flow rates or internal components. Always match the full Bosch part number, not just the vehicle model.
Common Bosch Injector Part Number Ranges
Bosch 0445110xxx Injectors
These are among the most common Bosch diesel injectors and are widely used in:
- BMW 2.0d / 3.0d engines
- Mercedes-Benz CDI engines
- VW / Audi TDI engines
- Ford, Peugeot, Citroën, and Volvo diesel models
Examples:
- Bosch 0445110186
- Bosch 0445110239
- Bosch 0445110321
Bosch 0445115xxx Injectors
Later-generation solenoid injectors designed for higher pressure and improved emissions performance.
Commonly found in:
- Euro 5 diesel engines
- Light commercial vehicles
- Vans and fleet vehicles
Bosch 0445116xxx Piezo Injectors
Piezo injectors are used in many Euro 5 and Euro 6 engines and require precise coding and calibration.
Typically used in:
- BMW piezo diesel systems
- Mercedes-Benz BlueTEC engines
- High-performance diesel applications
⚠️ Piezo injectors should only be replaced or reconditioned by specialists due to their complexity.
Bosch Injector Compatibility & Vehicle Matching
Bosch injectors are often shared across multiple manufacturers. A single Bosch part number may fit:
- Multiple engine codes
- Several vehicle brands
- Different model years
Always verify:
- Bosch injector part number
- Engine code
- ECU injector coding requirements
If unsure, professional cross-referencing is essential.
New vs Reconditioned Bosch Injectors
New Bosch Injectors
- Manufactured by Bosch
- Supplied with full factory calibration
- Highest cost option
Reconditioned Bosch Injectors
- Ultrasonically cleaned
- Fitted with new internal components
- Bench-tested and calibrated
- Significantly lower cost
Professionally reconditioned Bosch injectors offer excellent reliability when tested to OEM standards.
Common Symptoms of a Failing Bosch Injector
- Hard starting or non-start
- Rough idle or engine knocking
- Excessive black or white smoke
- Poor fuel economy
- Injector-related fault codes
Early diagnosis can prevent damage to pistons, turbochargers, and DPF systems.
Bosch Injector Coding (IMA / C2I Codes)
Most modern Bosch injectors require coding after installation. These codes:
- Compensate for manufacturing tolerances
- Ensure balanced fuel delivery
- Are entered into the ECU using diagnostic equipment
Failure to code injectors correctly can result in poor running and fault codes.
Bosch Injector Part Number Lookup Help
If you cannot find your Bosch injector part number or need confirmation before ordering, specialist verification is strongly recommended.
At Diesel Injector Pro, we help customers:
- Identify correct Bosch injector part numbers
- Cross-reference vehicle compatibility
- Choose between new or reconditioned injectors
Frequently Asked Questions
Can I replace one Bosch injector only?
Yes, but injector coding and balance rates should be checked to ensure smooth engine operation.
Are Bosch injectors interchangeable between brands?
Only if the Bosch part number is identical. Vehicle brand alone is not sufficient.
Do reconditioned Bosch injectors come coded?
Reconditioned injectors are supplied with calibration data, but ECU coding is usually required after installation.
Related Resources
- Diesel Injector Failure Symptoms Guide
- Reconditioned vs New Diesel Injectors
- Diesel Injector Part Number Cross-Reference
- Diesel Injectors