'23 M5C Run in service today

j3o3t3 · 01-31-2023, 09:51 PM

FYI.. I had read that the Run In service only replaced the rear Diff Fluid + Engine Oil / Filter.

My dealer replaced the Front and Rear diff fluid + engine Oil/ Filter. So, I've got that going for me !

My SA was surprised when I questioned him that I had understood only the rear diff fluid was done .

Car runs amazing , ready to take her out for some real rips now !

Revan · 01-31-2023, 10:31 PM

That's good to hear. I'm at 960 miles so getting close.

RichF90M5C · 02-01-2023, 02:01 AM

It’s a great feeling, getting the RIS done, then being able to unleash all the power

BobsM3Coupe · 02-01-2023, 07:38 PM

Quote:

Originally Posted by j3o3t3

FYI.. I had read that the Run In service only replaced the rear Diff Fluid + Engine Oil / Filter.

My dealer replaced the Front and Rear diff fluid + engine Oil/ Filter. So, I've got that going for me !

My SA was surprised when I questioned him that I had understood only the rear diff fluid was done .

Car runs amazing , ready to take her out for some real rips now !

Nice to hear, but I guarantee the dealer will not get reimbursed from BMW for servicing the front diff.

rsingh7 · 02-07-2023, 10:37 AM

Quote:

Originally Posted by BobsM3Coupe

Nice to hear, but I guarantee the dealer will not get reimbursed from BMW for servicing the front diff.

My dealer did the front and rear diffs at 1250 break in service. I didn't even ask.

gofastguy · 09-01-2023, 03:11 PM

Also coming up on break-in service for an F90 and dealer told me only rear diff fluid will be changed and if I wanted front diff fluid to be changed as well, I would have to pay out of pocket…is this necessary and/or worth it (to have front diff fluid changed too)?

micvite · 09-02-2023, 03:41 AM

Quote:

Originally Posted by gofastguy

Also coming up on break-in service for an F90 and dealer told me only rear diff fluid will be changed and if I wanted front diff fluid to be changed as well, I would have to pay out of pocket…is this necessary and/or worth it (to have front diff fluid changed too)?

Probably not at 1200 miles, realistically if you did you break in properly you never even activated the front diff. Now at say 5k miles with your next oil change I'd totally do it

Revan · 09-02-2023, 04:59 PM

When I brought mine in for 1200 mi service back in March, dealer said that only the rear differential had the break-in fluid.

When I questioned it, they showed me the actual BMW service bulletin that said the same. Dealer said ithey used to do it but BMW changed it.

oneofew · 09-02-2023, 05:34 PM

my 23 was rear diff only as well, I suppose rear is a (limited slip) locking function while the front is a open diff , hence no servicing.

micvite · 09-04-2023, 09:21 AM

Quote:

Originally Posted by oneofew

my 23 was rear diff only as well, I suppose rear is a (limited slip) locking function while the front is a open diff , hence no servicing.

They used to do it for the break in service and stopped, probably realized it was cost prohibitive and pretty useless at 1200 miles

pmsteinm · 09-04-2023, 09:35 AM

The front diff is also the same as the one in the G12 7 series. So it probably never made sense for it to have a break in service in the M. That said I plan to do all the drivetrain fluids around 50k miles. Maybe sooner if I'm feeling motivated or I track it.

01-31-2023, 09:51 PM	#1
j3o3t3 Private First Class 131 Rep 187 Posts Drives: 2023 M5 Competition Join Date: Jan 2011 Location: San Diego iTrader: (0)	'23 M5C Run in service today FYI.. I had read that the Run In service only replaced the rear Diff Fluid + Engine Oil / Filter. My dealer replaced the Front and Rear diff fluid + engine Oil/ Filter. So, I've got that going for me ! My SA was surprised when I questioned him that I had understood only the rear diff fluid was done . Car runs amazing , ready to take her out for some real rips now ! __________________ 2023 M5 Competition: Marina Bay Blue l Silverstone Merino Leather l Type 789 Rims l Executive Package l Acquired 12/30/2022 Prior BMW's 2011 550iMSport, 2008 5501MSport, 2005 5451, 1993 325iS
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01-31-2023, 10:31 PM	#2
Revan Private First Class 114 Rep 119 Posts Drives: 2023 M5C Join Date: Oct 2022 Location: FL iTrader: (0)	That's good to hear. I'm at 960 miles so getting close.
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02-01-2023, 02:01 AM	#3
RichF90M5C Lieutenant 1631 Rep 439 Posts Drives: 2023 F90 M5 Competition Join Date: Nov 2022 Location: UK iTrader: (0)	It’s a great feeling, getting the RIS done, then being able to unleash all the power
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09-01-2023, 03:11 PM	#6
gofastguy New Member 3 Rep 11 Posts Drives: BMW M5 Join Date: Jul 2022 Location: Canada iTrader: (0)	Also coming up on break-in service for an F90 and dealer told me only rear diff fluid will be changed and if I wanted front diff fluid to be changed as well, I would have to pay out of pocket…is this necessary and/or worth it (to have front diff fluid changed too)?
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09-02-2023, 04:59 PM	#8
Revan Private First Class 114 Rep 119 Posts Drives: 2023 M5C Join Date: Oct 2022 Location: FL iTrader: (0)	When I brought mine in for 1200 mi service back in March, dealer said that only the rear differential had the break-in fluid. When I questioned it, they showed me the actual BMW service bulletin that said the same. Dealer said ithey used to do it but BMW changed it.
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09-02-2023, 05:34 PM	#9
oneofew New Member 27 Rep 16 Posts Drives: 23 M5 Comp Join Date: Feb 2023 Location: CA. iTrader: (0)	my 23 was rear diff only as well, I suppose rear is a (limited slip) locking function while the front is a open diff , hence no servicing.
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09-04-2023, 09:35 AM	#11
pmsteinm First Lieutenant 316 Rep 396 Posts Drives: 23 M5C, 19 X5 Join Date: Jun 2015 Location: Raleigh, NC iTrader: (0) Garage List 2023 BMW M5C [0.00] 2019 BMW X5 xDrive40i [0.00]	The front diff is also the same as the one in the G12 7 series. So it probably never made sense for it to have a break in service in the M. That said I plan to do all the drivetrain fluids around 50k miles. Maybe sooner if I'm feeling motivated or I track it.
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