New Product Launch: Scania Urea Dosing Module (OE 2950983 / 3123161 / 2845278 / 2886472)
We are pleased to announce the release of our latest aftermarket replacement component — the Scania urea dosing module, offered under four OEM reference numbers: 2950983, 3123161, 2845278 and 2886472. This compact but mission-critical unit is designed for trucks, buses and industrial equipment powered by Scania Euro 4, Euro 5 and Euro 6 engines, and it is now available for global distributors, fleet workshops and repair centers.
The module is a direct-fit replacement that restores the original SCR (Selective Catalytic Reduction) function without any modification to the vehicle harness, mounting points or engine calibration.
Why the Urea Dosing Module Is So Important
Modern diesel engines cannot meet emission regulations on combustion alone. The urea dosing module — often called the AdBlue dosing module, DEF pump or SCR dosing unit — is the heart of the exhaust after-treatment system, and its accuracy directly determines whether the whole system works or fails.
- It is the gateway to legal compliance. The module pressurizes and injects AdBlue (32.5% urea solution) into the exhaust stream, where it converts harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor. Without a correctly functioning dosing module, NOx conversion collapses and the vehicle falls out of Euro 5 / Euro 6 limits.
- It protects the engine from derating. When dosing performance drops, the ECU logs a fault, illuminates the MIL lamp and progressively limits torque. A single failed module can park an entire truck or a whole fleet.
- It controls operating cost. Over-dosing wastes AdBlue and creates ammonia slip; under-dosing poisons the SCR catalyst and raises fuel consumption. Precise closed-loop dosing is what keeps both consumption and emissions in the optimal window.
- It safeguards the catalyst. Poor atomization or incorrect pressure causes urea deposits, crystallisation and thermal damage to the catalyst — a repair that costs many times more than the module itself.
Core Functions of the Module
| Function |
Description |
| AdBlue pressurization |
Builds and maintains stable system pressure from 4.5 to 9 bar so that urea can be atomized consistently in every operating condition. |
| Precise dosing control |
Receives commands from the engine ECU / DCU and delivers the exact quantity of urea required by the current load, speed and exhaust temperature. |
| Atomization & injection |
Injects urea as a fine mist into the mixing pipe ahead of the SCR catalyst for uniform distribution and maximum NOx conversion efficiency. |
| Heating & thawing |
Internal heating elements thaw frozen AdBlue (freezing point −11 °C) and keep the module operational in cold-climate markets. |
| Reagent quality sensing |
Monitors pressure, temperature and return flow to detect low reagent level, wrong fluid, blocked filters or leakage. |
| Self-diagnosis & protection |
Reports diagnostic trouble codes (DTCs) to the ECU, supports OBD monitoring and shuts down safely when abnormal conditions are detected. |
| Reverse purge on shutdown |
Empties urea from the lines when the engine stops, preventing freezing damage and crystallisation during long parking periods. |
Product Highlights
- Four OEM references in one part: 2950983, 3123161, 2845278 and 2886472 — simplifying stock keeping and improving service coverage.
- OEM-grade materials: urea-resistant seals and corrosion-protected internal components rated for continuous AdBlue contact.
- 100% end-of-line tested: every unit is pressure-tested and flow-tested before packing.
- Plug-and-play installation: factory connectors and mounting dimensions; no ECU reprogramming required.
- Stable supply: volume production with consistent lead times for distributors and fleet programs.
Recommended Applications
Scania trucks and buses with Euro 4, Euro 5 and Euro 6 SCR systems, including long-haul tractors, construction and mining vehicles, plus stationary and marine engine installations using the same dosing architecture. The module is an ideal choice for preventive maintenance programs, road-side repair and warranty replacement.
Quality You Can Verify
Each shipment is accompanied by batch traceability records and a functional test report. We welcome sample orders and third-party inspection, and our technical team can support cross-reference checks against your VIN list to make sure the correct variant is supplied.
Ordering Information
Please contact our sales team with your required quantity and destination market. Mixed pallet orders of the four OE numbers are accepted, and private-label packaging is available for established distributors.
Keywords: Scania urea dosing module, AdBlue dosing module, SCR dosing unit, OE 2950983, OE 3123161, OE 2845278, OE 2886472, Euro 5 Euro 6 SCR, DEF pump replacement.
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