Product Specifications:
Engineered for the rugged demands of regional distribution, transit routes, and heavy-duty utility tasks, the 0432191394 is a premium aftermarket Mechanical Fuel Injector. Precision-manufactured for the highly dependable Mercedes-Benz Atego, Unimog, and Citaro/Tourino buses powered by the OM904 4-cylinder diesel engines, this critical fuel system component aggressively cures hard starting, heavy exhaust smoke, and dangerous loss of hauling torque under peak payloads. By leveraging advanced high-stress nozzle metallurgy and precise spring tension, it guarantees a genuine plug-and-play installation. Commercial fleet operators and independent truck mechanics can bypass complicated electronic calibrations, instantly restoring optimal fuel atomization and maximized breakout force to keep crucial transport and utility operations strictly on schedule.
📊 Part Number Cross Reference
(Data verified via global catalog search – Extensive Interchangeability)
| Manufacturer Ref (Bosch Style) | Original Equipment (Mercedes-Benz Ref) |
| 0432191394 / 0 432 191 394 | 0050172321 / A0050172321 / A 005 017 23 21 |
| 0432191279 | – |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Model / Series | Engine Size | Year | Engine Code & Specs |
| Mercedes-Benz | Atego (714, 814, 1217, 1317, 1517) | 4.25L | Various | OM 904.916 / OM 904.917 |
| Mercedes-Benz | Citaro (O 530) / Tourino (O 510) | 4.25L | Various | OM 904 |
| Mercedes-Benz | Unimog / Accelo | 4.25L | Various | OM 904 |
👨🔧 Tech Notes & Installation Guide (FAQ)
Q: Why should I replace the full set of 4 injectors on my OM904 engine?
A: Mixing old and new mechanical injectors creates extreme fuel spray and pressure imbalances across the cylinders. This leads to rough idling, heavy vibration, and a high risk of catastrophic engine failure such as cracked cylinder heads or melted pistons. Replacing the full set ensures balanced torque output, and you instantly save money through our Tiered Pricing bulk discount.
Q: Does the 0432191394 injector require IMA coding?
A: No coding is required. As a mechanical fuel injector, it is manufactured to precise mechanical tolerances for a pure physical direct fit. It operates entirely as a Plug & Play (No Coding Required) system, relying on exact spring pressure and nozzle geometry to deliver fuel without the need for complex ECU software pairing.
Q: What is the critical cleaning step before installation?
A: You must completely flush the fuel lines and system to eliminate all microscopic metal debris. Furthermore, it is mandatory to install a brand new 5-micron diesel fuel filter before cranking the engine to prevent immediate contamination and nozzle scoring in the new injector.
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⚖️ Legal Disclaimer
Part numbers, OE numbers, and brand names mentioned above are for reference and identification purposes only. This product is a compatible aftermarket replacement part and is NOT manufactured, sponsored, or affiliated with the original equipment manufacturers.
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