![]() I added 24 ounces ( 0.7 liters) of 50/50 mix to raise the floating level indicator to between the low and high indicators when viewed on an even plane with the filler neck. The BMW coolant is a blue color I have never seen before. My level indicator in the reservoir was quite far down and not even visible when viewed at a low angle. It needs to be diluted 50/50 with distilled water. It cost me $8.35 (also available on GetBMWParts website for $6.68. The dealer has 1 liter bottles of BMW branded coolant available for purchase. My coolant indicator illuminated as well. Would a low coolant light warrant a coolant change even though I'm going to need a water pump in the near future and will more than likely have it changed them? Kinda want to know how to handle so it doesn't happen when my girls in the car and I'm no where near my Indy mechanic. It seems that there are mixed reviews on preventative maintenance on E90 water pumps and that just wait until it fails. My plan of attack is to top off the coolant and see if it comes back on to determine if there is a leak, even though I religiously check under my car for anything leaking and haven't noticed anything recently. My current Mileage is ~73K and I experienced the low coolant light this morning. I should have elaborated/provided more information in my initial post. You'll get yellow/orange t-stat (overheat) warning then red and next will be the low coolant light (pictured by OP).įor the record, you're looking at a $1000-2000 if you're experiencing a water pump & T-stat failure. Earliest that you'll encounter this issue is around 60k miles (for me it was at 59,8xx one month ago). You'll know when you're faced with a water pump/ T-stat failure. This means that ± 8.2% of the engine coolant has vanished (evaporated? leaking? bleeding?) in less than 16K kms (no track use).Trust me, bro. It took 0.85 liter of BMW approved engine coolant to get the red floating dipstick hovering back to max level again (as shown on the diagram printed on the engine coolant reservoir: see penultimate picture). blood in an average adult human body: 5 to 6 liter | 1.3 to 1.6 U.S.BMW 1M fuel tank capacity: 53 liter | 14 U.S.BMW 1M engine coolant capacity: 10.4 liter | 11 U.S.BMW 1M engine lubricant oil capacity: 6.5 liter | 6.9 U.S.(source: ) (probably equal values for the 135i: ) Dang, that sensor should be more vigilant to warn us ! Message to all: get a spare bottle of engine coolant (see last picture), just in case of need. ![]() Furthermore, "Too Low" was quite an understatement. ![]() Quite puzzling that, once the 1M OBC/iDrive threw the warning at me upon cold start yesterday, that warning subsequently vanished for the rest of the day, as if it had been a faulty sensor reading ( quod non). Red or blue, it was desperately in need for a pill/fluid. Then I looked inside the rabbit hole and saw it resting on the bottom of its pocket with zero coolant surrounding it. ![]() Worse, my first thought was "What the heck, where did the dipstick go ?". The red floating dipstick was no longer floating between minimum and maximum level as it should. So I checked the engine coolant level ( cold engine to avoid scalding/misreading). Just a false reading (glitch) or something to worry about ? Anyone experienced this yet ? Any recommendation regarding the appropriate type of engine coolant to be added (if required).Įxcerpt of the "BMW 128i/135i Owner's Manual 2012" (USA) (made available in the Manuals sticky: ) Got to wait for the engine to cool down to check the engine coolant level. Also nothing abnormal (oil temp remained normal). Rest of the day, for all drives: "OK" - "No Faults" when checking the "Vehicle Info"/"Vehicle Status" via the iDrive. Upon restarting the engine, the warning had vanished. It was a cold night but no freeze temps.Īfter a careful 100 meters drive I switched off the engine to check the manual (see pages 219-220 of the "BMW 128i/135i Owner's Manual 2012" (USA) pictured below - my 2011 European manual features a similar text on page 225). Also never got an engine warning light lighting up. Never experienced any such warning before. Upon starting the (cold) engine today the OBC immediately showed an "Engine coolant level too low" warning (see picture below the engine icon also featured on my OBC where normally the time is indicated).
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