0445120203

Check the OE stamping matches MAN part number 51.10100-6131 or 51.10100-6090. The 10-digit SKU 0445120203 should match the build plate on the original injector, and the DLLA141P2167 nozzle stamping (0433172167) should be visible. The IMA/Trim code is unique - cross-reference via BOSCH ESITronic or your MAN dealer. Do NOT substitute 0445120368 without verifying the IMA code - the F00RJ02561 valve group is shared but calibration differs.

F00RJ02561 is the primary control valve for 0445120203 and 4 sister SKUs in the F00RJ02561 group: 0445120203, 0445120368, 0445120441, 0445120437. The CRIN2 magnet assembly is F00RJ02703. Same valve group but different IMA/Trim code per SKU - NOT interchangeable without ECU re-coding.

Both share the F00RJ02561 control valve, but each carries a unique IMA/Trim code. Installing 0445120368 in an application that specifies 0445120203 will trigger P0201-P0206 fault codes and may cause over-fueling (black smoke) or hard starting. Always verify the OE number (51.10100-6131 for 0445120203) and the IMA/Trim code stamped on the F00RJ02703 magnet assembly.

Typical failures for MAN applications: (1) F00RJ02561 control valve wear causing over-fueling after 200,000-300,000 km; (2) DLLA141P2167 nozzle coking from contaminated fuel; (3) F00RJ02703 CRIN2 magnet assembly coil failure (P0201); (4) high-pressure line sealing washer failure; (5) ball seat erosion from abrasive fuel contaminants (Bosch documents this as the most common failure cause for European common rail injectors). Recommend replacement at 250,000 km or first symptom.

Disconnect the electrical connector from the F00RJ02703 magnet assembly, set multimeter to 200 ohm range, measure across solenoid terminals. Normal resistance: 0.5-2.0 ohm cold (engine off 30 min). Open circuit (>10 M ohm) = replace. Short circuit (<0.1 ohm) = replace. After replacement, the IMA/Trim code must be written to the ECU via BOSCH KTS 590 or ESITronic scanner.

Peak rail pressure 1600 bar in CRIN2-16 common rail. Low-pressure feed 4-6 bar. If rail pressure drops below 1400 bar under load, suspect a worn F00RJ02561 valve or clogged DLLA141P2167 nozzle. Also check high-pressure connector torque - MAN D2876 engines are particularly sensitive to loose fuel line fittings.

Mechanical install is moderate (20 N·m + 90° angle on CRIN2 plate, 25-30 N·m on high-pressure line, 15mm/17mm 2-wrench method), but ECU IMA/Trim coding requires BOSCH KTS 590 or ESITronic. Without coding, expect rough running and emissions failures. Most workshops: 3-4 hours total. Critical: insert vertically - any tilt damages the F00RJ02561 valve.

Genuine Bosch units (verified by Turbo Diesel UK official channel) carry 24 months unlimited mileage warranty. Aftermarket/copy units typically 6-12 months. Warranty covers manufacturing defects, F00RJ02703 magnet assembly failure, DLLA141P2167 nozzle defects. Does not cover contaminated fuel, incorrect installation (tilted insertion, over-torque), or failure to write IMA/Trim code. Keep installation record and BOSCH ESITronic coding log.

0445120203 is rated for Euro 4/5 (D2876LF12 / D2876LF13). It can also be used in Euro 3 applications (D2876LF02) because F00RJ02561 and DLLA141P2167 are shared. For Euro 6 MAN engines, the system adds SCR + DPF + EGR post-treatment and the IMA calibration differs - the 0445120437 SKU is the typical Euro 6 upgrade option.