Running the car with a low coolant level could also damage the car’s engine. If the coolant is at a lower level, it could cause problems with the car’s engine. It is generally recommended that your car’s coolant be at the manufacturer’s recommended level of 100 degrees F (38 degrees C). However, if the engine begins to misfire, smoke, or produce abnormal noises, it may be necessary to take the vehicle into a mechanic for a full coolant refill. Generally speaking, most vehicles should be able to drive for at least a few more miles with a low coolant level before requiring a full coolant refill. It depends on a variety of factors, including themake and model of the vehicle, the age and condition of the engine, and the driving style. At temperatures below 50 degrees Fahrenheit, the coolant will start to thicken and form sludge.Īt temperatures above 122 degrees Fahrenheit, the coolant will start to boil and form sludge and hydrocarbons. The safe operating range for coolant is between 50 and 122 degrees Fahrenheit. It is important to keep the coolant level high in BMW so that these problems don’t occur. The engine may overheat, the car may not start, or the coolant may leak and cause a fire. If the coolant is low in BMW, it can cause a variety of problems. What happens if the coolant is low in BMW? Coolant is used to keep your engine cool, and if the level is low, it can cause your engine to overheat. Curious as well as to where the coolant fluid has been disappearing to.No, you should not drive your BMW with low coolant. In an emergency, just top-off with distilled water. Maybe worth your while to keep a gallon at home. it isnt any more expensive than regular coolant. Im not aware of any leaks, engine hasn't ran hot by any means. Phosphate can contribute to corrosion of aluminum components. Once last year at this time and this year today actually. Avoid making any long journeys without enough coolant. I have a 15' 320 xi (95k) and have had to add coolant twice. This yellow warning light will come on when coolant levels are running low, to remind you to top them up. Ĭan someone with this exact same problem post a copy of the repair invoice (minus PII)? Or - PM me? I asked BMW NA to escalate and pay for turbocharger removal and inspection to see if coolant has been leaking through the bearing. So low coolant warning may appear later than expected. This problem was noted before the warranty expired so I was assured that future repairs will be covered.Īgain - both warm and cold pressure tests revealed no leaks. The service technician put tamper proof seals under both large and small reservoir caps and asked to return when coolant warning appears again. The dealer just advised me that the field engineer hasn't heard / could not find any instance of a problem where coolant loss was due to turbocharger leaking coolant through the bearing.Ĭan someone with this exact same problem post a copy of the repair invoice (minus PII)? I would ask the dealer to specifically investigate this issue. The coolant leaking through the turbo bearing (and evaporating) has been reported in the past. The reservoir cap on my 2017 440i GC was replaced. iTrader: ( 0) To comfort you, if the coolant is too low and the engine would start getting too hot, the car will let you know, tell you to pull over and shutoff the engine, and if you don't, it'll do the engine shutdown for you and let you roll out to get to the side of the road. If present, the main tank reservoir cap needs to be replaced. When the car is cold, remove the main tank reservoir cap and look for white residue. I suspect that one of the possibilities is coolant leaking through the reservoir cap or - more complex - through a faulty turbo bearing. I rolled my eyes as my 435 and 535 engines were turbos.Īnyone out there know if this is something to ignore or something to get shop to investigate further on? If ignore, I'm happy to keep topping off, just want some peace of mine. I asked the dealer service center about it and they said that was common for turbo engines. I have not noticed any liquids in the garage, albeit, this might be such a small leak that it burns off unnoticeably. Given my previous 435, 535 and 645 never had coolant warnings between services, it got me wondering if there is something either unique about the engine in the 440xi where coolant leaks out super slow as designed or if I have a defect somewhere. I've got a 2018 440xi with M-tune with 29k miles and about every 4-6 months, I am getting a coolant low warning.
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