CAS or starter?

whathewill · 03-31-2024, 10:43 AM

Recently bought a 09 M3. Started up perfectly every time but the temp recent dipped and now I’m having starting problems. Pulled some codes. Does anybody have any experience with these codes? Starter or CAS?

TIA

BPMSport · 03-31-2024, 02:48 PM

Very likely the CAS.

RocketyMan · 04-02-2024, 04:13 PM

Agreed. It's the CAS. There is a rebuilder that can refurb the module. It's fairly easy to get to. The module is located on the driver side kick panel.

https://the-ecu-pro.com/garage/servi...bmw-m34.0i/cas

BP709 · 04-03-2024, 08:02 AM

CAS 100%. Starting to see many failures on e8x and e9x as the cars age. New ones have been on backorder from BMW.

Honda · 04-03-2024, 09:42 AM

I disagree with above. This is starter problem. I had similar codes before and once I replaced the starter, it fires up every single time now.

whathewill · 04-03-2024, 09:45 AM

Thank you all for the response. I know this is an known issue for these cars. I will take a look at the ground strap later also.

omgzirra_exe · 04-03-2024, 10:54 AM

Terminal 50 is a starter solenoid issue.

test starter.

easy stuff is checking the ground behind the glove box fuse box.

03-31-2024, 10:43 AM	#1
whathewill New Member 0 Rep 6 Posts Drives: bmw m3 Join Date: Mar 2024 Location: chicago iTrader: (0)	CAS or starter? Recently bought a 09 M3. Started up perfectly every time but the temp recent dipped and now I’m having starting problems. Pulled some codes. Does anybody have any experience with these codes? Starter or CAS? TIA Attached Images
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03-31-2024, 02:48 PM	#2
BPMSport BimmerPost Supporting Vendor 3387 Rep 7,542 Posts Drives: Harrop M3 / F10 M5 / F82 M4 Join Date: Apr 2008 Location: SoCal iTrader: (9) Garage List 2000 BMW M5 [0.00] 1990 BMW 735i Turbo [0.00] 2008 BMW M3 [7.50] 2015 BMW M3 [0.00] 2015 BMW M5 [0.00]	Very likely the CAS. __________________ -----\| Like us on Facebook \| Instagram \|\| Tuning Information \| Remote Coding \|----- ----Visit us at www.BPMSport.com - Emotion. Driven. \| Toll Free: (888) 557-5133----
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04-02-2024, 04:13 PM	#3
RocketyMan First Lieutenant 231 Rep 354 Posts Drives: E53 X5, E83 X3, E93 M3 Join Date: Nov 2022 Location: PNW iTrader: (0) Garage List 2008 BMW M3 E93 [10.00]	Agreed. It's the CAS. There is a rebuilder that can refurb the module. It's fairly easy to get to. The module is located on the driver side kick panel. https://the-ecu-pro.com/garage/servi...bmw-m34.0i/cas __________________ 2008 BMW M3 E93 MT R135 └┼┼┼ ..246
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04-03-2024, 08:02 AM	#4
BP709 Private First Class 230 Rep 191 Posts Drives: BMW F97 X3m, Harrop E90 M3 Join Date: Jun 2019 Location: Houston iTrader: (0)	CAS 100%. Starting to see many failures on e8x and e9x as the cars age. New ones have been on backorder from BMW.
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04-03-2024, 09:42 AM	#5
Honda Lieutenant Colonel 289 Rep 1,537 Posts Drives: BMW Join Date: Feb 2014 Location: US iTrader: (25)	I disagree with above. This is starter problem. I had similar codes before and once I replaced the starter, it fires up every single time now.
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04-03-2024, 09:45 AM	#6
whathewill New Member 0 Rep 6 Posts Drives: bmw m3 Join Date: Mar 2024 Location: chicago iTrader: (0)	Thank you all for the response. I know this is an known issue for these cars. I will take a look at the ground strap later also.
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04-03-2024, 10:54 AM	#7
omgzirra_exe Lieutenant Colonel 1490 Rep 1,701 Posts Drives: 4.4L M3, IS300 Join Date: Jun 2019 Location: Long Beach, CA iTrader: (0)	Terminal 50 is a starter solenoid issue. test starter. easy stuff is checking the ground behind the glove box fuse box. __________________ Build: ZillaSpec M3 N1 Build M3Post Track General Discussion: Discord #fakeGTS
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