2013 BMW X3 Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functional Radiator Fan in Your 2013 BMW X3 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 2013 BMW X3 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 cause the engine cooling fan to operate improperly, leading to overheating or inadequate engine cooling.
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 2013 BMW X3 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

The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.

A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.

A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.

» LEARN MORE: Signs of a bad thermostat, and how to fix it

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 2013 BMW X3?

To effectively diagnose a non-functioning radiator fan in your 2013 BMW X3, begin with the simplest solution: checking the fuse. A blown fuse can often be the culprit, so replace it with one of the same size and type if necessary. If the new fuse blows again, this may indicate a deeper electrical issue, such as a short circuit or excessive draw. Next, inspect the fan itself for any visible damage or wear that could hinder its operation. If the fan appears intact, proceed to examine the fan assembly, which can typically be accessed by removing the air filter housing and inlet duct. This process usually involves unscrewing just a couple of screws, allowing you to unplug and lift the fan assembly for a closer look. Additionally, monitor your engine temperature; if it runs hotter than usual, this could signal a malfunctioning cooling fan. Lastly, listen for any unusual sounds from the fan, such as continuous running or loud operation, which may indicate a problem. By following this structured approach, you can efficiently diagnose and address issues with your radiator fan, ensuring your BMW X3 operates smoothly.

What are the common problems that could cause the radiator fan to stop working in a 2013 BMW X3?

When dealing with a non-functioning radiator fan in a 2013 BMW X3, it's crucial to recognize the common problems that may be at play. One primary issue could be a faulty fan motor, which may prevent the fan from operating altogether. Additionally, electrical problems, such as blown fuses or damaged wiring, can disrupt the fan's functionality. Another potential culprit is a failing water pump, which can cause erratic fan behavior, such as excessive cycling or complete failure to engage. It's also important to consider that a malfunctioning cooling fan itself may indicate broader issues within the cooling system, necessitating repair or replacement. If the water pump is compromised, the fan may work overtime to compensate, leading to further complications. Addressing these issues promptly is essential to prevent engine overheating and avoid severe damage, making it vital for DIYers to conduct a thorough diagnosis of the radiator fan and its related components.

How urgent is it to repair the non-functioning radiator fan in a 2013 BMW X3?

Repairing the non-functioning radiator fan in a 2013 BMW X3 is an urgent matter that should not be overlooked. A malfunctioning radiator fan can lead to severe engine overheating, which poses a significant risk of damaging critical engine components. This not only jeopardizes the vehicle's performance but can also result in costly repairs down the line. Additionally, the radiator fan plays a vital role in the efficiency of the car's air conditioning system; without it functioning properly, drivers may experience inadequate cooling, making for an uncomfortable ride, especially in warmer weather. Symptoms such as an elevated temperature gauge are clear indicators that the radiator fan requires immediate attention. Furthermore, issues with the fan clutch can exacerbate the problem, leading to further complications if not addressed promptly. Therefore, for DIY enthusiasts, tackling the repair of the radiator fan should be prioritized to ensure the vehicle operates safely and efficiently, preventing potential long-term damage and maintaining comfort during drives.

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