0445120207
0445120207 Injector: Detroit DD15 DD16 OM472 Specs
A4720700887, A4720700587, A4720700787, A4720700387, RA4720700887, EA4720700887, 4720700887F00RJ02004F00VX500382100 barProduct Overview
The Bosch 0445120207 (industrial type CRIN4 / CR/IPL36/ZERIS70S) is an amplified common rail diesel injector engineered for Daimler Trucks and Detroit Diesel heavy commercial vehicles. Factory fitted in Detroit Diesel DD15 (14.8L), DD16 (15.6L), and Mercedes-Benz OM472 / OM473 heavy-duty engines, this injector operates on the Bosch X-Pulse amplified system with baseline rail pressures of 2,100 bar and peak amplified injection pressures exceeding 2,500 bar. Direct OEM replacement for Detroit and Mercedes references A4720700887, A4720700587, A4720700787, A4720700387, RA4720700887, and Bosch remanufactured units 0986435539. For workshop installation specifications and angle tightening, refer to our comprehensive [Diesel Injector Torque Specs Guide](/knowledge/torque-specs/).
Vehicle & Engine Fitment
| Vehicle | Engine | Years |
|---|---|---|
| Freightliner Cascadia 14.8L DD15 | Detroit Diesel DD13 / DD15 (Mercedes-Benz OM 471 12.8L) | 2008-2020 |
| Western Star 4900 / 5700XE 14.8L / 15.6L | Detroit Diesel DD13 / DD15 (Mercedes-Benz OM 471 12.8L) | 2010-2020 |
| Mercedes-Benz Actros MP4 / Antos / Arocs | Detroit Diesel DD13 / DD15 (Mercedes-Benz OM 471 12.8L) | 2011-2020 |
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 0445120207 |
| Brand | Detroit Diesel / Mercedes-Benz / BOSCH |
| Type | CRIN4 Commercial Heavy-Duty Common Rail Injector |
| OE Number | A4720700887 |
| Control ValveCore Spec | 🔗 Shared Valve (2 assemblies):0445120104 |
| Nozzle CodeCore Spec | 🔗 Shared Nozzle (2 assemblies):0445120104 |
| Nozzle Part NumberCore Spec | 🔗 Shared Nozzle (2 assemblies):0445120104 |
| Magnet Assembly | F00VC30053 |
| Seal Ring Kit | F00VP01004 |
| Injection System | Bosch Common Rail (CRIN4 amplified X-Pulse) |
| Operating PressureCore Spec | |
| Torque Spec | 55 N·m |
| Hold Down Torque | 20 N·m + 90° |
| Warranty | 12 Months |
| Emission Standard | EPA10 / GHG14 / Euro VI |
| Engine Family | Detroit Diesel DD15 / DD16 (OM472) |
| Coding Required | Yes (Detroit IQA Code) |
Installation Tips
Tools needed: Detroit Diesel injector hold-down socket tool (W470589000900), High-pressure jumper tube collar socket (19mm & 24mm), Digital torque wrench (10 N·m - 100 N·m range), Torque angle gauge (360° indicator), Detroit Diesel Diagnostic Link (DDDL) software for IQA flow calibration, Injector bore reamer and vacuum extraction kit
- Clean the injector sleeve and cylinder head copper washer landing thoroughly using a brass bore tool and industrial vacuum.
- Fit a brand-new OEM annealed copper sealing washer (1.50mm) onto the nozzle body. Never reuse old washers.
- Carefully lower the 0445120207 injector into the cylinder head bore, ensuring proper alignment of the fuel inlet port.
- Pre-install the high-pressure fuel feed tube (jumper tube) by hand to guarantee cross-thread-free alignment with the internal cone seat.
- Install the injector hold-down collar with a brand-new TTY stretch bolt. Snug to 20 N·m (15 lb-ft), then apply a 90-degree angle turn.
- Torque the high-pressure fuel feed tube nut to 55 N·m (41 lb-ft).
- Torque the leak-off return line banjo union to 15 N·m (11 lb-ft).
- Connect DDDL diagnostic software and program the 6-character IQA flow correction code into the MCM2 engine control unit.
Frequently Asked Questions
What is the correct hold-down torque for Detroit DD15 injector 0445120207?
The hold-down collar bolt must be torqued to 20 N·m (15 lb-ft) initial snug stage, followed by an additional 90-degree angle rotation. The bolt is Torque-to-Yield (TTY) and must be replaced every time it is loosened.
Do I need to program the IQA code when replacing this injector?
Yes. Each Bosch 0445120207 injector features a unique 6-character IQA calibration code etched onto the body. This code must be written into the Detroit MCM2 / DDEC 10 ECU using DDDL diagnostic software to balance cylinder fuel delivery.
What OEM part numbers interchange with Bosch 0445120207?
Direct factory interchange numbers include Detroit Diesel / Daimler references A4720700887, A4720700587, A4720700787, A4720700387, RA4720700887, and Bosch remanufactured number 0986435539.
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.