NRF 47422 Fan, radiator

NRF 47422 Fan – Engine Cooling Radiator Fan

The NRF 47422 fan is a high‑performance electric motor designed specifically for the cooling systems of Audi A6 models (C6, Avant, Allroad) and related variants. It delivers reliable airflow to maintain optimal engine temperatures under all operating conditions.

Key Functional Characteristics

• Purpose: Drives the radiator fan assembly to circulate coolant air through the radiator core, preventing overheating.
• Motor Type: Brushless DC electric motor with integrated speed control for precise airflow regulation.
• Operating Voltage: 12 V automotive electrical system.
• Power Consumption: Typically around 30–40 W, depending on RPM and load.
• Speed Range: Adjustable from ~500 RPM to over 3000 RPM via electronic control unit (ECU).
• Cooling Capacity: Designed to match the radiator specifications of Audi A6 engines ranging from 2.0L to 3.2L.

Physical Specifications

Compatibility Overview

The NRF 47422 fan is engineered to fit a wide range of Audi A6 engine configurations:

• Audi A6 C6 (2004‑2011) – 2.0 L, 2.4 L, 2.8 L, 3.0 L, 3.2 L petrol and diesel variants.
• Allroad C6, Avant, and Quattro models with TDI or TFSi engines.
• Engine codes: BLB/BNA/BRE/BRF/CAGB (2.0 L), BDW (2.4 L), BDX (2.8 L), BBJ (3.0 L).

Installation Guide

1. Preparation: Disconnect the vehicle battery to prevent electrical shock.
2. Removal of Old Fan: Unscrew the mounting bolts, detach the wiring harness, and carefully lift the fan assembly out of the radiator bay.
3. Mounting New Fan: Align the NRF 47422 fan with the mounting holes, secure with bolts, and reconnect the wiring harness ensuring correct polarity.
4. Testing: Reconnect the battery, start the engine, and verify that the fan engages at appropriate RPMs. Check for any abnormal vibrations or noises.

Performance Benefits

• Enhanced Cooling Efficiency: The brushless design provides smoother operation and higher airflow compared to older brushed motors.
• Reduced Electrical Load: Optimized motor winding reduces power draw, contributing to overall vehicle efficiency.
• Longevity: Durable construction with minimal moving parts leads to extended service life under high‑temperature conditions.
• Quiet Operation: Low vibration and noise levels improve cabin comfort.

Maintenance Tips

• Inspect the fan blades for dents or corrosion every 20,000 km; replace if damaged.
• Check electrical connections periodically to ensure tightness and absence of corrosion.
• Clean the fan housing from dust and debris to maintain optimal airflow.

Technical Support & Documentation

For detailed wiring diagrams, ECU integration notes, or firmware updates, consult the official Audi service manual or authorized technical resources. The NRF 47422 fan is compliant with OEM specifications for all listed engine models.

Conclusion

The NRF 47422 radiator fan represents a reliable, high‑quality component essential for maintaining the thermal stability of Audi A6 engines. Its precise engineering, broad compatibility, and robust construction make it an ideal choice for both original equipment replacement and aftermarket upgrades.