Diesel Injector Interchange & Reference Guide

1. 10-Digit Part Number Hierarchy

Locate the BOSCH part number laser-etched on the metal solenoid body, typically on the lower section near the electrical connector. The format is a standardized 10-digit code:

• 0445 110 xxx: Passenger car & light commercial solenoid common-rail injectors (CRI1, CRI2).
• 0445 115 / 116 / 117 xxx: Piezo common-rail injectors (CRIP2, CRIP3).
• 0445 120 xxx: Heavy commercial, truck, and industrial common-rail injectors (CRIN).
• 0438 xxx xxx: Unit Injector Systems (UIS / PDE) for older commercial platforms.

For each engine platform, there is typically a primary SKU plus 1-3 sister SKUs that share the same control valve casting but differ in internal nozzle spray hole diameter and IMA calibration.

2. Primary vs Sister SKUs (The IMA Coding Difference)

A common workshop trap is treating look-alike sister SKUs as interchangeable. For example, on the Renault F9Q 1.9 dCi platform:

3. Control Valve Part Number Series

The control valve regulates the hydraulic pressure above the nozzle needle. Two primary series cover the vast majority of diesel systems:

• F00VC codes: Cover CRI2 passenger car and light commercial platforms (e.g. F00VC01005, F00VC01052).
• F00RJ codes: Cover CRIN heavy-duty and commercial truck platforms (e.g. F00RJ01692, F00RJ02004).

The valve code is laser-etched on the internal valve disc body, never on the external plastic harness connector.

4. Step-by-Step Cross-Reference Procedure

1. Wipe carbon from the metal body: Use a solvent rag and strong LED light to inspect the laser etching on the metal housing.
2. Record the 10-digit Bosch SKU: Confirm the first four digits are 0445 or 0438.
3. Cross-match against vehicle manufacturer OE number: Verify that the Renault, PSA, BMW, or Mercedes part number stamped on the head matches the engine family index.
4. Check the nozzle tip stamping: Confirm the 9-character DLLA/DSLA code matches the calibration spec sheet.
5. Verify ECU coding compatibility: Check whether your scan tool (KTS, CLIP, Star/Xentry) supports generating or entering the replacement IMA code.

5. Common Costly Mistakes to Avoid

• Relying on OE part number alone: A single vehicle manufacturer OE number can map to two distinct Bosch SKUs across production model years.
• Connector shape alone: The external 2-pin electrical plug geometry is shared across multiple generations and does NOT confirm internal spray specifications.
• Ignoring the 12-month remanufacturing code: Bosch exchange injectors carry a 0986 435 xxx number that cross-references directly to the original 0445 110 xxx assembly.

6. Required Verification Tools

Verified technical specifications, pinout schematics, and hold-down clamp torque figures for assemblies cited in this protocol: