11-28-2022, 02:42 AM | #1 |
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22' M550I N63TU3 Substantial Coolant Loss
22' M550I sitting at 13K miles. Coolant needed to be topped up twice within 5-6k miles. No visible leaks or anything unusual, most likely being burnt. Possible lemon on the third time? Confident message will pop back up soon enough, seems like these N63TU3's are a hit or miss with eating coolant. TYIA!
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11-28-2022, 05:16 AM | #2 | |
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12-14-2022, 01:33 PM | #5 |
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These cars do not "consume coolant" as the dealer might tell you. You have a leak, a small leak that will eventually rear it's ugly head. Most likely the leak is dripping onto the valley pan and burning off. So nothing on the ground and nothing to see in the engine bay.
I was adding a pinch of coolant every other month. Dealer said normal. Then the leak increased to the point where I could smell the burn off coming through my interior vents. Nose burning and eye watering. My turbo coolant lines were leaking and they were replaced with the updated stainless ones as this is a known issue. I have not had to add coolant since, problem solved. Tell the dealer you have the same smell even if you don't. This will at least make them look hard for coolant burn off powder on the valley pan or other places.
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12-16-2022, 03:51 AM | #6 | |
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12-16-2022, 03:53 AM | #7 | |
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Prior BMW's: 1987 325e|1993 740i|1998 740il|2001 530i|2002 745li|2007 750li|2006 750li|2001 530i|2012 535xi| Last edited by Joe-BMW33; 12-16-2022 at 06:25 AM.. |
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12-17-2022, 12:30 AM | #8 |
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12-25-2022, 10:14 AM | #9 |
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I had the same issue as Joe-BMW. I started smelling something coming from my vents when the heat was on. It didn't smell like typical coolant from say a leaky heater core. But it did bother my eyes and nose. Then the low coolant message came on.
The dealer said it was the turbo coolant lines and replaced them with the updated ones. Luckily all under warranty. |
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Joe-BMW338153.00 |
12-25-2022, 11:03 AM | #11 |
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You lost a GALLON of coolant ? That's ridiculous. I cant believe the Dealership let you drive the car off the lot. Do you see any white smoke coming from exhaust on start up ? That's a sign of a blown head gasket.
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12-25-2022, 12:29 PM | #12 |
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Coolant is a closed, pressurized (under heat) system. No leaks is the acceptable leakage amount. Anything more is unacceptable and you should hold them to account. If they say it's normal, tell them you'd like to see the design specification from BMW stating that it is normal. Produce the paper or fix the problem.
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12-26-2022, 02:27 AM | #13 |
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No smells, no drips, no white smoke, nothing. Gonna ask them to check it out next service less than 500 miles away.
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12-26-2022, 09:08 AM | #14 | |
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If that were my car and I lost a Gallon of coolant before the low coolant warning came on, they would be keeping it until fixed. I've had low coolant warnings on my M550 twice within 13,000 miles. Both times it took less than a water bottle to top off.
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11-23-2023, 01:14 PM | #15 |
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Interesting. I just got into the m550 club and had the same coolant issue. I didn't realize how common this issue is. Curious to hear back from your dealer at your next maintenance appt. Keep us posted
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12-13-2023, 08:07 AM | #16 |
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2022 m550i with 12k miles here.
Had a "low coolant" warning come on just before my 1st service (around 6k miles). Dealer said they checked the system and no leaks, topped off the coolant. Had another "low coolant" warning come on just before my 2nd service (right around 12k miles) this time the Dealer said the coolant tank had cracked and they replaced it under warranty. Given the long time between the vehicle's initial "in service date" and 1st leak (6k miles, almost 1 year) and between 1st service and 2nd leak (another 6k miles and almost 1 more year) I'm not in a position to say whether or not replacing the coolant tank has addressed the issue, but I should be able to tell you in a year or so. I'm hoping it was a cracked coolant tank, because if the engine burns coolant as a matter of course, that's just piss poor design or quality control, which will definitely impact whether or not I buy another BMW, especially since BMW has been "working on improving" the N63 engine ever since they put it into production. |
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03-16-2024, 08:27 AM | #18 | |
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03-16-2024, 01:58 PM | #19 | |
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03-16-2024, 03:23 PM | #20 |
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