750i N63B44O2 coolant leak, what about N63B44T3?

edojac · 01-01-2023, 08:46 AM

At ca. 135´000 km my 2016 G11 750i xDrive started experiencing a coolant leak.
Problem identified as shown in picture.
BMW did not allow to just substitute the leaking rubber hose and instead requires a significant upgrade with steal pipes (wise...) as in the last picture. The cost around EUR 2700 (covered by warranty in my case).

Questions:
1) anybody else had this issue on this engine?
2) is the upgrade of the coolant piping implemented in the next generation engine? (G11 engine N63B44T3)? I.e. the "restyling" version of G11.

Th3Spectre · 01-01-2023, 11:56 AM

Wow, that steel hose replacement looks great. Glad your cost was covered too. I have an extended warranty on my G12 16', but mileage is only at 17k (got her at 13k w\ extended warranty in summer of last year). I haven't had any leaks on the old rubber ones yet, and changed out the coolant myself a few months ago. I sort of wish a coolant leak would happen though so I can upgrade to those new steel ones lol

AlteBMW · 01-02-2023, 11:59 AM

There was a recall in the US to replace the hoses with stainless steel, so yes, that is a known issue.

01-01-2023, 08:46 AM	#1
edojac New Member 11 Rep 18 Posts Drives: BMW 2016 750i & 2018 M760i Join Date: Dec 2022 Location: Austin, Texas iTrader: (0) Garage List 2018 BMW M760Li xDrive [0.00] 2016 BMW 750i xDrive [0.00]	750i N63B44O2 coolant leak, what about N63B44T3? At ca. 135´000 km my 2016 G11 750i xDrive started experiencing a coolant leak. Problem identified as shown in picture. BMW did not allow to just substitute the leaking rubber hose and instead requires a significant upgrade with steal pipes (wise...) as in the last picture. The cost around EUR 2700 (covered by warranty in my case). Questions: 1) anybody else had this issue on this engine? 2) is the upgrade of the coolant piping implemented in the next generation engine? (G11 engine N63B44T3)? I.e. the "restyling" version of G11. Attached Images
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01-01-2023, 11:56 AM	#2
Th3Spectre New Member 6 Rep 17 Posts Drives: 2016 BMW 750xi Join Date: May 2022 Location: USA iTrader: (0)	Wow, that steel hose replacement looks great. Glad your cost was covered too. I have an extended warranty on my G12 16', but mileage is only at 17k (got her at 13k w\ extended warranty in summer of last year). I haven't had any leaks on the old rubber ones yet, and changed out the coolant myself a few months ago. I sort of wish a coolant leak would happen though so I can upgrade to those new steel ones lol
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01-02-2023, 11:59 AM	#3
AlteBMW Lieutenant Colonel 725 Rep 1,592 Posts Drives: '23 760ix; '23 X3; '23 MB wgn Join Date: Mar 2014 Location: New York iTrader: (0) Garage List 2023 X3 x30 [0.00] 2023 BMW 760ix [10.00] 2023 Mercedes E450 ... [0.00]	There was a recall in the US to replace the hoses with stainless steel, so yes, that is a known issue. __________________ BMWCCA Current: 23 760ix (Carbon Black/Tartufo) (after first one totaled) '23 X3; '23 MB E Wagon Prior: BMWs (3,5,7 & 8 series (2x!)) X3, MB (C, E, and S), Alfa GTV, MGB, Audi (A4, A6), Saab, Volvo, Toyota, Lincoln, Chrysler, Oldsmobile, Chevy, Rambler. Last edited by AlteBMW; 01-02-2023 at 02:11 PM..
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