MAN 81.15403-6101 AdBlue Feed Module
MAN 81.15403-6101 AdBlue Feed Module – Precision Dosing for Effective Emissions Control in Euro 5 Vehicles
The MAN 81.15403-6101 AdBlue Feed Module is a vital component in the Selective Catalytic Reduction (SCR) system used in Euro 5 compliant MAN trucks. Designed to deliver AdBlue (urea solution) into the exhaust stream with high accuracy, this feed module enables the conversion of harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor. As emissions regulations become increasingly strict, components like the 81.15403-6101 play a central role in ensuring compliance, fuel efficiency, and sustainable engine performance.
What is an AdBlue Feed Module?
An AdBlue feed module is an integrated assembly that includes a dosing pump and control unit responsible for supplying the correct volume of AdBlue from the tank to the dosing injector. It ensures consistent pressure, temperature monitoring, and flow regulation, enabling precise injection according to the vehicle’s operating conditions.
The 81.15403-6101 feed module is specifically designed for MAN trucks equipped with Euro 5 engines and SCR systems. It forms a closed-loop system that communicates with the engine control unit (ECU) to adjust dosing in real time based on sensor feedback from the exhaust stream.
Technical Specifications
- Part Number: 81.15403-6101
- Function: AdBlue delivery pump and module
- Operating Voltage: 24V (standard for commercial vehicles)
- Operating Pressure: Calibrated for SCR system requirements
- Construction: Composite and aluminum materials with integrated electrical connectors
- Temperature Range: -40°C to +85°C
- AdBlue Compatibility: ISO 22241-compliant urea solution
- OEM Application: MAN TGS, TGX, and other Euro 5 models
Key Features and Benefits
1. Precise AdBlue Dosing
The core function of the MAN 81.15403-6101 AdBlue Feed Module is to deliver exact quantities of AdBlue under varying load and engine conditions. This ensures NOx emissions are effectively reduced, while also avoiding over-dosing that can lead to crystallization or under-dosing that results in failed emissions compliance.
2. Integrated Pump and Heater System
The feed module includes an internal pump and, in cold climates, an electric heating element that prevents the freezing of AdBlue. This ensures year-round operational reliability even under extreme weather conditions.
3. Improved SCR System Efficiency
Accurate and responsive dosing enhances the performance of the SCR catalyst. This contributes to reduced fuel consumption, improved combustion, and prolonged life of emission-related components.
4. OEM Quality and Fitment
As a genuine MAN 81.15403-6101 AdBlue Feed Module guarantees compatibility with factory-installed SCR systems. It integrates seamlessly with vehicle electronics and diagnostics systems, providing real-time performance data and fault detection.
5. Long-Term Durability
The module is engineered with high-resistance materials that withstand vibration, corrosion, and exposure to urea solution. Its sealed design prevents moisture ingress and electrical shorts.
Installation and Maintenance
Proper installation and maintenance of the AdBlue feed module are crucial to maintaining vehicle compliance and efficiency. While the module is designed for long-term use, it is subject to wear and contamination, especially if low-quality AdBlue is used.
Installation Tips:
- Ensure the system is depressurized and drained before replacement
- Always use ISO 22241-certified AdBlue
- Replace seals and gaskets during installation to prevent leaks
- Perform a system bleed or priming procedure after installation
- Use OEM diagnostic tools to reset fault codes and recalibrate the system
Maintenance Recommendations:
- Inspect module and lines for urea crystal buildup every 60,000–80,000 km
- Drain and flush the AdBlue tank annually
- Monitor for early warning signs such as SCR error codes, reduced power, or AdBlue consumption anomalies
Signs of a Failing AdBlue Feed Module
- Dashboard warning lights (SCR system or check engine)
- Excessive AdBlue consumption
- Engine derating (limp mode)
- Poor NOx reduction performance
- Urea crystal deposits around connectors or fittings
Replacing a failing feed module with a genuine 81.15403-6101 unit restores SCR system performance and avoids costly downtime.
Applications and Compatibility
The 81.15403-6101 feed module is used across a variety of MAN Euro 5 trucks including:
- MAN TGS – Regional and long-haul logistics
- MAN TGX – Heavy-duty international transport
- MAN TGA (late Euro 5 models) – Fleet and vocational applications
Always verify compatibility using the vehicle’s VIN or engine type. The module is designed specifically for Euro 5 SCR systems and is not interchangeable with Euro 6 versions without modification.
MAN 81.15403-6101 AdBlue Feed Module
The MAN 81.15403-6101 AdBlue Feed Module is a critical part of the Euro 5 emissions control system. Its precise dosing capabilities, robust construction, and system integration make it indispensable for maintaining vehicle performance, regulatory compliance, and environmental sustainability.
Fleet managers, service technicians, and parts distributors should prioritize genuine modules to ensure optimal system function and avoid unnecessary repairs. For long-term reliability, low operating costs, and clean emissions, trust in OEM solutions like the 81.15403-6101 AdBlue feed module.
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