2017 BMW X1 Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functioning Radiator Fan in Your 2017 BMW X1 and How to Fix It

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
34% chance it's the
Fan Motor or Clutch
0%
28% chance it's the
Fan Relay or Fuse
0%
23% chance it's the
Temp Sensor or Fan Control Module
0%
15% chance it's
Something else
The most common reasons a 2017 BMW X1 radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor.
  • Fan Motor or Clutch: A faulty fan motor or a malfunctioning fan clutch can result in inadequate cooling, causing the engine to overheat.
  • Fan Relay or Fuse: A faulty fan relay or blown fuse can prevent the cooling fan from operating, leading to engine overheating.
  • Temp Sensor or Fan Control Module: A faulty temperature sensor or fan control module can result in incorrect readings, causing the engine to overheat or the cooling fan to operate improperly.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2017 BMW X1 radiator fan isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Over time serpentine belts stretch, crack, and the ribs that ride on the accessory pulleys being to wear smooth. A squealing noise that increases with engine speed or as engine driven accessories are turned on may be noted. The noise is caused by the belt slipping on the pulleys, insufficiently driving them. Ineffective air conditioning, a battery warning light, or intermittent power steering assist can result from this.

»MORE: Symptoms of a bad serpentine belt

When the engine coolant temperature sensor fails, it will send inaccurate information to the vehicle’s computer, causing the computer to react to false operating conditions. This will cause the engine to consume more fuel than normal, depleting fuel mileage, and causing black, sooty smoke from the engine under moderate to heavy acceleration. The check engine light will illuminate, and on-board diagnostic trouble codes may be stored for exhaust and emission system failure, fuel delivery system failure, and engine cooling system failure. Overheating may also occur, as the coolant sensor may be leaking fluid out of the engine, creating a an air pocket in the system.

When the radiator fans stop functioning properly, the engine temperature will rise. The spike in temperature will be highest when the vehicle is idling at a stop, but should subside once the vehicle begins moving again.

Additionally, the air conditioner typically won't blow as cold. This is because the air from the radiator fans also blows across the air conditioning condenser, so when the fans fail, both systems suffer.

You'll also usually see the check engine light and notice a drop in fuel economy. It's possible the fan will start making noise if it's failing, as well.

What are the steps to diagnose the non-functioning radiator fan in a 2017 BMW X1?

When diagnosing a non-functioning radiator fan in a 2017 BMW X1, it's crucial to follow a methodical diagnostic approach that emphasizes simpler checks before tackling more complex issues. Start by inspecting the fuse linked to the radiator fan, as a blown fuse is a common culprit that can easily be replaced. If the fuse is in good condition, move on to the relay, which controls the fan's operation; a faulty relay can prevent the fan from receiving power. Next, test the fan motor by applying direct power to it; if the motor does not respond, it may need to be replaced. Additionally, ensure that the temperature sensor is functioning properly, as it plays a vital role in activating the fan when the engine reaches a specific temperature. Pay attention to the wiring and connections as well, since loose or damaged wires can hinder the fan's performance. Finally, utilizing a diagnostic scanner to check for error codes can reveal any additional issues affecting the radiator fan system. By systematically addressing these areas, you can effectively diagnose and resolve the problem, ensuring your BMW X1 runs smoothly.

What are the common problems that could cause the radiator fan to stop working in a 2017 BMW X1?

When diagnosing why the radiator fan in a 2017 BMW X1 has stopped working, it's crucial to consider several common problems that could be at play. A faulty fan motor is often the primary suspect, as it can fail to spin, leading to overheating issues. Additionally, a blown fuse in the fan circuit can interrupt the power supply, effectively shutting down the fan's operation. Another potential culprit is a defective temperature sensor, which may fail to signal the fan to activate when the engine reaches a certain temperature. Over time, the fan blades themselves can wear out or sustain damage, diminishing their cooling efficiency. Lastly, electrical issues such as loose wiring or corroded terminals can disrupt the necessary power flow to the fan. Addressing these issues promptly is essential to prevent engine overheating and ensure the longevity of your vehicle. Regular maintenance checks can help identify these problems early, allowing for timely repairs and optimal performance.

How urgent is it to address the non-functioning radiator fan in a 2017 BMW X1?

Addressing a non-functioning radiator fan in a 2017 BMW X1 is of utmost urgency due to the vital role this component plays in maintaining engine temperature. The radiator fan is responsible for dissipating heat generated during engine operation; without it, the engine is at risk of overheating. This overheating can lead to severe consequences, including warping of the cylinder head or even catastrophic engine failure, which can result in costly repairs. Ignoring the symptoms of a malfunctioning fan not only jeopardizes the vehicle's performance but also poses a significant safety risk. Therefore, it is crucial for DIY enthusiasts to prioritize the repair or replacement of the radiator fan to ensure the longevity and reliability of their BMW X1, ultimately safeguarding against extensive damage and high repair costs.

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