Q: Frequent dropping in coolant level

asked by on

Good day. Pls my bmwx3 fan comes on intermittently except when am using AC. The coolant level also drops frequently.

My car has 120000 miles.
My car has an automatic transmission.

This can be caused by a number of things, such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know, the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off. I would suggest having an expert from YourMechanic come to your home to diagnose your cooling system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Frequent dropping in coolant level

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Is the wheel bearing and rotor made all together? How do I get the rotor off?

Hello, thank you for writing in. False, the rotor and the wheel bearing are two separate components. The rotor just becomes incredibly hot and dirty fusing it into place. If you have a lot of dust, snow, or rain in...

Q: Door ajar warning on, interior lights on - 2014 BMW X1

Hello. The body control module (BCM) controls the interior lights for this vehicle. The BCM gets inputs for the interior lights to come on by any one of the door switches or the interior light switch. If any one of...

Q: Car smells like something is burning or wet

Hello there. Based on the description you've provided, this seems to be a possible coolant leak onto a hot component of the engine such as on the exhaust pipe. Any part of the cooling system could be leaking. A good...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.