0445110021 - F9Q 1.9 dCi Common Rail Injector

Yes, if your engine is an F9Q 1.9 dCi (Renault) or 1.9 CDTI/DTI (Opel) and the OE code 0433175230 is stamped on the existing injector body. The 0445110021 fits the Laguna I/II, Megane I, Scenic I, Trafic II, Master II, Vivaro and Movano platforms from 1999 to 2006. Always cross-check by physical inspection - the Bosch part number is laser-etched on the solenoid housing, not the plastic cover.

The OE reference 0433175230 is laser-etched on the metal solenoid body of the existing injector, typically on the lower 1/3 of the injector near the electrical connector. Use a torch and magnifying glass - the numbers are small (1 mm high) and may be hidden under light carbon. Do not rely on the plastic colour cap, the box label, or a dealer invoice number. If the etched code reads differently (e.g. 0433175257), you have a different SKU and must order that exact number.

They share the same physical injector body, nozzle (DSLA140P862+), and control valve (F00VC01005) - but they are incompatible IMA codes - NOT interchangeable without ECU re-coding. Each sister SKU has a unique IMA (Injector Mounting Adapter) calibration code that the F9Q ECU learns during coding. Swapping 0445110021 0445110146 without re-coding will cause rough idle, P0201-P0204 codes, and limp-home mode within 50 km. Always order the exact SKU your ECU was originally coded for, or re-code all 4 injectors as a matched set after replacement.

The F00VC01005 is the solenoid control valve that meters the fuel pressure inside the injector by opening and closing the spill port at high frequency. It is calibrated as a matched pair with the DSLA140P862+ nozzle at the Bosch factory. If you replace the nozzle (0433175230) but keep an old F00VC01005, the leak-back rate drifts outside the 2 ml/min Bosch spec and triggers fuel over-consumption + black smoke. Always replace the control valve and nozzle together as a matched pair.

Complete Injector Assembly. The 0445110021 is the full solenoid-operated injector including the DSLA140P862+ nozzle and F00VC01005 control valve. It is NOT a nozzle-only part. If your mechanic diagnosed a stuck nozzle only, you can replace just the 0433175230 nozzle cartridge - but the injector must be sent to a Bosch-authorised service centre for nozzle replacement and re-calibration. Do not attempt nozzle swap on the bench.

Professional workshop equipment required: 17 mm injector bore reamer, 2 calibrated torque wrenches (low-range 5-25 N m + high-range 20-100 N m), injector puller slide hammer, ultrasonic cleaner, flow test bench, and Bosch KTS or Renault CLIP diagnostic tool for ECU coding. Always replace all copper washers and O-rings. Follow vehicle-specific workshop manual torque specs: 25 N m for the hold-down bolts, 20 N m for the high-pressure line nuts. Do not exceed 30 N m - the injector bore distorts at 35 N m and causes hydraulic lock.

Common symptoms: hard cold start (especially below 5degC), white smoke on cold start (unburnt fuel), black smoke under load (over-fuelling from stuck nozzle), power loss above 3,000 rpm, rough idle, increased fuel consumption (10-15% over baseline), and engine warning light with P0201, P0202, P0203, or P0204 codes. Use diagnostic equipment to identify the affected cylinder via cylinder-cut-out test - do not replace all 4 injectors when only one is faulty.

Yes - common rail F9Q injectors require cylinder-specific ECU coding via Bosch KTS, Renault CLIP, Delphi DS150E, or equivalent OEM-level diagnostic tool. The coding writes the IMA (Injector Mounting Adapter) calibration value to the ECU. Without coding, the ECU will mis-fire the new injector and trigger P0201-P0204 within 50 km. Mechanical nozzle-only replacement on Denso systems does not require coding, but the Bosch F9Q is a solenoid common-rail system and ALWAYS requires coding.

12 months on the injector assembly (manufacturing defects). Warranty is void if: (1) the injector is disassembled or nozzle is replaced by a non-Bosch-authorised centre, (2) the ECU is not re-coded after installation, (3) the O-rings and copper washers are re-used, (4) the hold-down bolts are over-torqued above 30 N m. OEM Renault/Opel warranty follows vehicle terms. Always purchase from a supplier who provides a written warranty card with the Bosch factory batch code.

High-grade alloy steel injector body (hardened and tempered for 1,600 bar cyclic pressure), hardened steel nozzle needle (ground to 0.0005 mm tolerance), 6-hole spray disc drilled by EDM (electrical discharge machining) for precise 0.140 mm hole diameter. Quality materials are critical for high-pressure common rail durability - substandard aftermarket injectors fail within 10,000 km due to nozzle needle wear or solenoid coil insulation breakdown.

Three common mistakes to avoid: (1) Ordering 0445110021 (injector) when only the nozzle (0433175230) is needed - they are different components and different price points. (2) Confusing 0445110021 with 0445110056 or 0445110146 - these share the same physical assembly but have different IMA codes, so the wrong sister SKU will trigger P0201 even if it physically bolts in. (3) Forgetting to specify the OE Renault/Opel numbers (7700107165 / 93183595) when ordering from a dealer - these are required for cross-referencing.

Fuel system: Common Rail Diesel (CRI2.1 generation, Bosch high-pressure solenoid injectors). Peak rail pressure: 1,600 bar. Emission standard: Euro 3. The 1,600 bar pressure is INFERRED from the Bosch CRI2.1 spec - the F9Q 1.9 dCi engine is officially rated at 1,350-1,600 bar depending on ECU calibration. For exact pressure, refer to the Bosch ESI[tronic] database or the Renault workshop manual for the specific F9Q variant.

Common case: 2002 Renault Laguna II 1.9 dCi (F9Q 750) with 185,000 km on the clock. Owner reported: cold-start white smoke for 5 seconds, engine warning light on, rough idle, fuel consumption up from 6.5 L/100 km to 8.1 L/100 km. Diagnostic: Bosch KTS showed P0201 (Injector Cylinder 1 - Circuit Malfunction) and P2146 (Injector Quantity Adjustment Range Error). Cylinder cut-out test confirmed Cylinder 1 power loss. Cause: DSLA140P862+ nozzle needle wear (6 holes enlarged from 0.140 mm to 0.165 mm, reducing rail pressure atomisation). Fix: replaced all 4 injectors as a matched set (0445110021 with 12-month warranty), re-coded ECU with Renault CLIP, road-test 50 km to confirm no P0201-P0204 codes returned. Post-fix fuel consumption returned to 6.7 L/100 km within 200 km of driving.