0445120104
0445120104 Injector: Detroit DD15 Mercedes OM472 Specs
A4720700887, A4720700087, A4720700387, A4720700587, A4720700787, 4720700887, RA4720700887F00RJ02004F00VX500382100 barProduct Overview
The BOSCH 0445120104 is an authentic OEM heavy-duty common rail fuel injector (CRIN4.2 generation, formula CR/IPL36/ZERIS70S) engineered for the 14.8L Detroit Diesel DD15 (EPA10/GHG14) and Mercedes-Benz OM472 / OM473 Euro 6 commercial engine platforms. Operating with an amplified peak injection pressure reaching 2100 bar, it features the factory genuine Bosch nozzle assembly F00VX50038 and high-speed electromagnetic actuation. It directly replaces Daimler / Detroit OEM references A4720700887, A4720700087, A4720700387, A4720700587, A4720700787, 4720700887, remanufactured OE RA4720700887, superseded Bosch unit 0445120207, and Bosch Exchange units 0986435539 and 0986435540. Program the unique calibration code into the Detroit DDEC or Mercedes MCM engine control module upon installation to maintain strict cylinder balancing.
Verify OEM part number A4720700887 on the injector solenoid collar before installation. Bosch 0445120104 is calibrated exclusively for 14.8L Detroit DD15 and Mercedes-Benz OM472 heavy-duty platforms (A472 series). It must NOT be interchanged with 12.8L DD13 injectors (A471 series, 0445120194/0445120385). Injector clamp bolts are Torque-To-Yield (TTY) stretch fasteners and MUST be replaced with new bolts torqued to 20 N·m (15 lb·ft) + 90°.
Vehicle & Engine Fitment
| Vehicle | Engine | Years |
|---|---|---|
| Freightliner Cascadia / Coronado 14.8L | Detroit Diesel DD13 / DD15 (Mercedes-Benz OM 471 12.8L) | 2010-2015 |
| Western Star 4900 / 5700XE | Detroit Diesel DD13 / DD15 (Mercedes-Benz OM 471 12.8L) | 2010-2015 |
| Mercedes-Benz Actros MP4 / Antos / Arocs 1845 / 1848 / 1851 | Detroit Diesel DD13 / DD15 (Mercedes-Benz OM 471 12.8L) | 2011-2015 |
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 0445120104 |
| Brand | Freightliner / Western Star / Mercedes-Benz / BOSCH |
| Type | Complete Injector Assembly (Bosch Common Rail (CRIN4.2 / X-Pulse Amplified solenoid)) |
| OE Number | A4720700887, A4720700087, A4720700387, A4720700587, A4720700787, 4720700887, RA4720700887 |
| Nozzle CodeCore Spec | 🔗 Shared Nozzle (2 assemblies):0445120207 |
| Control ValveCore Spec | 🔗 Shared Valve (2 assemblies):0445120207 |
| Injection System | Bosch Common Rail (CRIN4.2 / X-Pulse Amplified solenoid) |
| Operating PressureCore Spec | |
| Torque Spec | 40 N·m |
| Hold Down Torque | 20 N·m + 90° |
| Warranty | 12 Months |
| Emission Standard | Euro 6 / EPA10 |
| Engine Family | Detroit DD15 / DD16 (14.8L / 15.6L) & Mercedes-Benz OM472 / OM473 |
| Coding Required | Yes (IMA / Calibration Code) |
Installation Tips
Tools needed: Detroit Diesel J-48770 high-pressure line socket or open-end torque crowfoot wrench, Torque angle gauge / digital angle torque wrench (20 N·m + 90° capacity), Clean brass injector bore brush and shop vacuum extraction kit, Detroit Diagnostic Link (DDDL) or Mercedes-Benz Xentry diagnostic tool
- Thoroughly clean the cylinder head injector bore using a brass bore brush and vacuum extraction; inspect the lower sealing sleeve for pitting, fretting, or residual copper washer fragments.
- Discard used hold-down clamp stretch bolts. Install a brand-new copper crush washer onto the injector tip, applying a light film of clean engine oil or high-temperature ceramic anti-seize paste to the injector body (strictly avoiding the nozzle tip and spray orifices).
- Insert injector 0445120104 vertically into the bore until properly seated; hand-start the hold-down clamp bolt to ensure alignment with the rocker arm assembly.
- Hand-thread the high-pressure fuel line cap nuts onto the injector inlet and rail fitting until finger-tight to prevent thread cross-alignment.
- Torque the brand-new hold-down clamp bolt to exactly 20 N·m (15 lb·ft), then apply a continuous 90° angle turn using a calibrated torque angle gauge.
- Torque the high-pressure fuel line cap nuts to 40 N·m (29 lb·ft) using tool J-48770 or an open-ended torque crowfoot wrench while counter-holding the injector fitting.
- Connect the electrical solenoid harness terminals and tighten the retaining nuts to 1.5 N·m (1 lb·ft). Do not over-torque to prevent terminal post fracture.
- Torque the injector wiring harness allen head bracket screws to 10 N·m (7 lb·ft).
- Reinstall the rocker cover and torque all cover bolts in an alternating cross pattern to 20 N·m (15 lb·ft).
- Connect Detroit Diagnostic Link (DDDL) or Mercedes Xentry; program the 6-digit injector calibration code printed on the injector body into the respective cylinder slot, prime the low-pressure fuel circuit, and verify zero fuel rail leakage under high idle.
- Critical TTY Bolt Mandate: Detroit DD15 injector clamp bolts are torque-to-yield fasteners engineered to stretch during the final 90° step. Reusing old bolts causes clamp load relaxation, combustion gas blowby, and damaged injector cups.
- High-Pressure Line Counter-Holding: Always use the factory service crowfoot tool J-48770 when torquing the line nut to 40 N·m. Uneven side loading can shear internal alignment pins and trigger rail pressure fault codes (P0087).
- Solenoid Terminal Caution: The M4 electrical studs are delicate. Tighten strictly to 1.5 N·m (13 lb·in). Over-tightening will snap the stud inside the solenoid housing, requiring complete injector replacement.
- DDEC Calibration Coding: Failure to update the injector calibration code in DDDL after replacement results in rough idle, cylinder cutout test deviations, and premature DPF regeneration cycles.
Frequently Asked Questions
What engines use Bosch injector 0445120104?
Bosch 0445120104 is designed for 14.8L Detroit Diesel DD15 (EPA10 / GHG14) and 15.6L DD16 engines, as well as European Mercedes-Benz Actros MP4, Antos, and Arocs commercial trucks equipped with the OM472 or OM473 Euro 6 engine platforms.
What is the OEM part number for 0445120104?
The primary Daimler / Detroit OEM part number is A4720700887 (or 4720700887). Previous superseded revisions include A4720700087, A4720700387, A4720700587, A4720700787, and factory remanufactured part number RA4720700887.
Can I use 0445120104 on a Detroit DD13 engine?
No. Detroit DD13 (12.8L, OM471) engines use the A471 series injectors (such as Bosch 0445120194, 0445120195, or 0445120385). Injectors between DD13 and DD15 differ in nozzle spray geometry, flow calibration, and internal fueling curves. Interchanging them will cause cylinder misfire, excessive smoke, and potential piston crown damage.
What is the hold-down clamp bolt torque specification?
Detroit Diesel factory service procedure specifies torquing the hold-down clamp bolt to 20 N·m (15 lb·ft) followed by a 90° angle turn. You must always install brand-new stretch bolts.
What torque is required for the high-pressure fuel line?
The high-pressure fuel line nuts must be torqued to 40 N·m (29 lb·ft) using service tool J-48770 or an appropriate crowfoot wrench.
Does Bosch 0445120104 require ECU programming?
Yes. Each injector has a specific calibration code printed on its body that must be entered into the DDEC / MCM engine control module using diagnostic software (DDDL / Xentry) to balance fuel delivery per cylinder.
What is the superseded replacement part number for 0445120104?
Bosch has superseded 0445120104 with upgraded part number 0445120207. Factory remanufactured exchange units are supplied under Bosch part numbers 0986435539 and 0986435540.
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.