Cooling Fan and Shroud Assembly for Tesla Model S/X (2021–) | CFN Brand | 1754791-00-A

1. Core Function Description

1. Dual-System Thermal Protection:
   • Battery Thermal Stability: Drives targeted airflow through the battery coolant radiator, maintaining the battery pack at its optimal operating range (25–40℃) during fast charging (e.g., 250kW Supercharging), high-speed cruising (130km/h+), or hot-weather use (38℃+ ambient). This prevents overheating-induced range loss (avoiding ≥8% range drop in extreme heat) and slows battery degradation.
   • Powertrain Heat Dissipation: Collaborates with the motor/inverter radiator to dissipate heat from the electric drive unit, ensuring consistent power output (no torque reduction during 0–100km/h acceleration cycles) even under heavy loads (e.g., Model X towing 2,268kg).
2. Aerodynamic Shroud Optimization: The integrated shroud—made of CFN’s proprietary PP+GF30 (polypropylene + 30% glass fiber)—features an OEM-matching curved airflow channel that reduces turbulence by 20% and boosts airflow efficiency by 15% compared to generic split shrouds. It also forms a tight seal with the radiator, eliminating "dead air zones" that weaken cooling performance.
3. Brushless Motor Reliability: Equipped with a high-performance BLDC (brushless DC) motor, enhanced by CFN’s custom high-temperature synthetic grease for bearings. This enables silent operation (≤58dB at full speed, quieter than OEM’s 62dB) and a long service life (≥20,000 hours of continuous use). The motor supports Tesla’s PWM (Pulse-Width Modulation) speed control, adjusting airflow from 500 to 3,200 CFM (Cubic Feet per Minute) in real time based on the vehicle’s thermal demands.

2. Specification Parameter Table

3. Fault Judgment (Signs for Replacement)

• Thermal Warning Alerts: Dashboard messages such as "Battery Temperature Too High" or "Powertrain Cooling System Fault"—indicating insufficient airflow to regulate temperatures, which risks component damage.
• Abnormal Fan Behavior:
  • Fan fails to activate (even under heavy load/high temperature, e.g., after 10 minutes of Supercharging).
  • Fan runs at full speed continuously (no PWM adjustment), causing excessive noise and 12V battery drain (≥15% overnight).
  • Fan emits grinding, screeching, or rattling sounds (worn bearings or bent blades) or stalls intermittently (motor winding damage).
• Visible Damage: Shroud cracks (longer than 10mm) or warping (due to extreme heat), creating gaps that reduce airflow efficiency; fan blades bent/missing (causing unbalanced rotation and vibration).
• Performance Degradation: Sudden range loss (＞10% in hot weather), slower acceleration (e.g., 0–100km/h time increased by 1+ second), or Supercharging speed reduced (e.g., capped at 100kW)—all caused by inadequate cooling.

4. Advantages of CFN Brand (vs. Generic Products)

5. Installation Details

5.1 Package Contents

• 1× CFN cooling fan and shroud assembly (1754791-00-A)
• 4× OEM-spec M6×16mm mounting bolts (with anti-vibration EPDM washers)
• 1× Silicone sealant packet (for shroud-radiator gap sealing)
• 1× Installation guide (with step-by-step diagrams of bumper removal and alignment marks)
• 1× Connector cleaning cloth (for pre-installation wiring harness maintenance)

5.2 Required Tools

• Socket wrench set (8mm, 10mm)
• Torque wrench (0–30 Nm range)
• Phillips screwdriver (No. 2)
• Plastic trim removal kit (for safe bumper/underbody panel removal)
• Compressed air can (for cleaning radiator fins before installation)

5.3 Installation Precautions

1. Safety Prep:
   • Turn off the vehicle and disconnect the 12V battery (located in the frunk) to avoid electrical shorts.
   • Wait 30 minutes for the cooling system to depressurize (prevents coolant spillage when removing the old assembly).
2. Old Assembly Removal:
   • Remove the front bumper cover using plastic trim tools (avoid scratching paint); set aside with protective padding.
   • Disconnect the old assembly’s wiring harness (press the 6-pin connector’s release tab); remove the 4 mounting bolts (8mm socket).
   • Gently pull the old assembly away from the radiator—take care not to damage radiator fins (use compressed air to clear debris first).
3. New Assembly Installation:
   • Apply a thin, even layer of silicone sealant to the shroud’s edge (where it contacts the radiator) for a airtight seal.
   • Align the CFN assembly with the radiator’s mounting points; secure with new bolts, torquing to 8±1 Nm (per Tesla’s factory specification).
   • Reconnect the wiring harness—ensure the connector clicks into place (verify no loose wires).
4. Post-Installation Check:
   • Reconnect the 12V battery; start the vehicle and activate "Max Cool" climate control to test fan operation (listen for smooth, quiet airflow).
   • Use Tesla’s diagnostic tool (or touchscreen "Service Mode") to confirm no cooling system error codes.

6. After-Sales Support (CFN Brand)

• Warranty: 3-year/60,000-kilometer warranty (whichever comes first), covering fan motor failure, shroud cracking/warping, or wiring harness defects (excludes damage from coolant leaks, collisions, or improper installation).
• Technical Assistance: CFN’s EV thermal management specialists offer 24/48 email/chat support for installation guidance (e.g., bumper removal tips, error code reset) and troubleshooting.
• Quality Guarantee: 30-day free replacement or full refund if the assembly is incompatible with your Model S/X (2021–) or has manufacturing defects (unused, original packaging required).

7. Usage & Bulk Tips

• Maintenance: Inspect every 20,000 kilometers—use compressed air to clean dust/debris from fan blades and shroud (avoid high-pressure water, which may damage the motor’s waterproof seal).
• Coolant Care: Replace the vehicle’s coolant every 4 years/80,000 kilometers (per Tesla’s schedule); contaminated coolant reduces heat transfer and can clog the radiator.
• Bulk Inquiries: Repair shops, fleet operators, or EV service centers can contact CFN’s commercial sales team for bulk pricing—custom 5-unit packaging, flexible delivery schedules, and on-site technical training (for cooling system diagnostics) are available.