BMW is a brand built on performance, sensual design, and comfort beyond compare. However, their exceptional quality does not mean they’re immune from the mechanical ailments that can eventually befall vehicles of almost any make and model. One of the more uncomfortable and potentially dangerous ailments your BMW can contract is a faulty or damaged heater core.
The heater core is part of your vehicle’s cooling system. In short, it is responsible for your vehicle’s defrosting and heating abilities. Radiator fluid (also called coolant) circulates through 2 hoses through the engine, the end result of which is warm air entering your vehicle’s cabin to keep your windows defrosted and the ambient temperature warm for you. Essentially, the heater core is the mediator of heat exchange between the cabin and coolant.
Depending on how your heater core fails, the symptoms and effects on the cabin can differ greatly, varying from freezing cold to burning hot. Signs of heater core failure can include:
This is the most obvious sign your heater core has stopped functioning. This means your heater core has most likely sprung a leak. If so, coolant vapor can be released into your vehicle’s cabin.
This scent often accompanies a bad heater core. This is the smell of the coolant itself and is a sign your radiator fluid is leaking. This can be accompanied by coolant dripping onto the passenger floorboard and/or an oily-looking mist rising on the front windshield.
This is a sure sign something is wrong with your heat exchange system. While this isn’t a definitive sign your heating core is gone, a complete absence of leaking radiator fluid can actually tell you where to look. The most likely reason you’re unable to find a leak is because the coolant is dripping into your cabin when the heating system is blowing cold. If your passenger side’s floor is wet, this is a likely culprit.
Last, this is a glaring signal your heater core has gone bad. While there may be other causes, when this is combined with any of the other symptoms, it is a good indicator something in the heater core has broken down. If your cabin is consistently cold, this could indicate your heater core has a hole in it, allowing warm air to escape before it reaches the cabin. On the flip side, if your vehicle is unbearably hot, this could also be a broken heater core. As extreme heat in an engine is a recipe for impending disaster, immediately inspecting an overheated engine at a qualified mechanic’s shop is paramount.
Ultimate Bimmer Service of Carrolton and Dallas, TX, offers over 30 years of experience in BMW repair in Dallas and Carrolton communities. Our ASE-certified mechanics are the only hands that will ever touch your BMW for any type of service, from tuneups to brake services to engine repair.
At Ultimate Bimmer Service of Carrolton and Dallas, Texas, we understand that the outrageous costs of parts and labor at a dealership can cause customers to cringe, both for price and the sheer amount of effort you have to go through to get your vehicle serviced. However, our competitive pricing, low overhead, and professionally-trained experts will have you back on the road safely and quickly. We also offer free multi-point general inspection, free air pressure and fluid level checks, and preliminary diagnosis with every appointment.
If you have reason to believe your BMW is experiencing the symptoms of a faulty heater core, look no further than Ultimate Bimmer Service of Carrolton and Dallas for all your BMW heating and cooling needs. We only use genuine BMW parts and state-of-the-art equipment in our shop, which means you can rest assured that your vehicle will receive the service and attention it deserves. With our guaranteed appointments, after-hours and late drop off/pickup, and free WiFi in the lobby for those who want to wait during service, we know you’ll be satisfied with the quality of our exceptional service.