What's In My ECU Box?!

Marvelousone · 06-19-2010, 01:17 AM

Long story short, I take the car in on Monday for HPFP issues, get it back Friday after new HPFP ( 934 I believe ) and new software.

Get home, pop the hood straight away for some JB3 reinstall, and I find a new, little black box. I feel crazy, cuz I don't remember that being there the last...5 times I've gone into the ECU box.

What the hell is it?

The arrows show the wires going into the box, and the square is around it.

Jonny550 · 06-19-2010, 01:25 AM

thats the module that shuts down the car if boost goes over 11psi.

JK i have no idea.

stevenc · 06-19-2010, 06:49 AM

it appears to be normal

Tochenzo · 06-19-2010, 08:51 AM

Hmmm...I have an 09 as well and I know for a fact I don't have that in my ecu box.

eleven11 · 06-19-2010, 09:07 AM

Marvelousone · 06-19-2010, 09:55 AM

Yes exactly. I'm surprised that pic ( which seems to be from the ECU removal walkthrough ) has the little box because mine did not. I looked over the BMW Parts list from my maintenance and there is a sensor, the HPFP, and some nuts and bolts. Nothing about the box.

Someone's gotta know!

dmailloux · 06-19-2010, 10:56 AM

shady!!!

BSM 135i · 06-19-2010, 01:16 PM

i have an 08' and just recently ran my 2.0 cable through the glove box and i have that little black box.

Tochenzo · 06-19-2010, 01:40 PM

Maybe I just didn't notice it before as well, too lazy to go out and check again though. I'm sure if BMW didn't put it on the work order they didn't do anything they wouldn't want you to know about.

onefastman · 06-19-2010, 02:54 PM

Im very curious

ridin135 · 06-19-2010, 04:18 PM

I have it also

Marvelousone · 06-20-2010, 12:34 AM

Well if a lot of people have it, and still have the JB3 without issue, I dont think there should be a problem and I'll just re-install.

That still doesnt answer a) What it is? b) Why its been added now?

Shady is right...

Dackelone · 06-20-2010, 07:12 AM

Quote:

Originally Posted by Marvelousone

Well if a lot of people have it, and still have the JB3 without issue, I dont think there should be a problem and I'll just re-install.

That still doesnt answer a) What it is? b) Why its been added now?

Shady is right...

Why don't you remove that relay... read and record the BMW part number... then put it into REALoem and see what comes up in the search? Or call a dealer and ask.

Marvelousone · 06-20-2010, 09:16 AM

Didn't know about this realOEM thing. Definately an option, I'll take a look later today.

Dackelone · 06-20-2010, 10:07 AM

yes, there is a search engine at the top left of the page, once you click on the ENTER button. Don't enter your car model info... just type in the part nunber in that top left window.

jeremyc74 · 06-20-2010, 12:20 PM

Judging by the size and number of wires coming in (two large ones and two small ones) it's some sort of power control relay. You'd be hard pressed to consume that much power in a module that small if it were something other than a relay without having some visible heat sinks.

I doubt very seriously that this was retrofitted by the dealer during a service trip.
I'd say it's more likely that it's always been there and you just didn't notice it under all the wires.

From RealOEM:

06-19-2010, 01:17 AM	#1
Marvelousone Private 9 Rep 52 Posts Drives: 2009 135i Join Date: Dec 2009 Location: Toronto, ON iTrader: (1)	What's In My ECU Box?! Long story short, I take the car in on Monday for HPFP issues, get it back Friday after new HPFP ( 934 I believe ) and new software. Get home, pop the hood straight away for some JB3 reinstall, and I find a new, little black box. I feel crazy, cuz I don't remember that being there the last...5 times I've gone into the ECU box. What the hell is it? The arrows show the wires going into the box, and the square is around it. Attached Images __________________ 2009 135i AT / CF Trim / ACS Pedals / Alpine HID 7000K / ST Coilovers / BMS DCI / VMR v701 18"/215/40 18"/245/35
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06-19-2010, 01:25 AM	#2
Jonny550 Brigadier General 241 Rep 4,936 Posts Drives: 2012 550i Xdrive Join Date: Feb 2009 Location: Jersey Shore iTrader: (14)	thats the module that shuts down the car if boost goes over 11psi. JK i have no idea. __________________ [SIGPIC][/SIGPIC] .
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06-19-2010, 06:49 AM	#3
stevenc Coming Soon 254 Rep 960 Posts Drives: 2015 BMW M4 Alphine White MT Join Date: Apr 2008 Location: Houston, TX iTrader: (0)	it appears to be normal
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06-19-2010, 08:51 AM	#4
Tochenzo Second Lieutenant 13 Rep 249 Posts Drives: 2009 135i Join Date: Dec 2008 Location: VA iTrader: (5) Garage List 2009 135i [0.00] 1998 328i [10.00]	Hmmm...I have an 09 as well and I know for a fact I don't have that in my ecu box. __________________ National Capital Chapter BMW CCA #367673
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06-19-2010, 09:07 AM	#5
eleven11 Major 370 Rep 1,425 Posts Drives: -F85 X5M- Join Date: Mar 2007 Location: Derby City iTrader: (0)	__________________ 2017 X5M - Current 2017 F31 Wagon - Current 2014 M5 ZCP - Retired 2011 135i Coupe - Retired 2007 335i Sedan - Retired
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06-19-2010, 09:55 AM	#6
Marvelousone Private 9 Rep 52 Posts Drives: 2009 135i Join Date: Dec 2009 Location: Toronto, ON iTrader: (1)	Yes exactly. I'm surprised that pic ( which seems to be from the ECU removal walkthrough ) has the little box because mine did not. I looked over the BMW Parts list from my maintenance and there is a sensor, the HPFP, and some nuts and bolts. Nothing about the box. Someone's gotta know! __________________ 2009 135i AT / CF Trim / ACS Pedals / Alpine HID 7000K / ST Coilovers / BMS DCI / VMR v701 18"/215/40 18"/245/35
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06-19-2010, 10:56 AM	#7
dmailloux Navy Chief 31 Rep 447 Posts Drives: '14 CBM X6M Join Date: Mar 2008 Location: San Diego iTrader: (1) Garage List 2019 Triumph Speed ... [0.00]	shady!!! __________________ '19 Triumph Speed Triple RS STOLEN: '18 S1000RR SOLD: '14 X6M, 711WHP '09 135i, 2012 Daytona 675R, '16 S1000RR
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06-19-2010, 01:16 PM	#8
BSM 135i Colonel 206 Rep 2,229 Posts Drives: 08' BSM E82 Join Date: Dec 2008 Location: Cali iTrader: (23)	i have an 08' and just recently ran my 2.0 cable through the glove box and i have that little black box.
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06-19-2010, 01:40 PM	#9
Tochenzo Second Lieutenant 13 Rep 249 Posts Drives: 2009 135i Join Date: Dec 2008 Location: VA iTrader: (5) Garage List 2009 135i [0.00] 1998 328i [10.00]	Maybe I just didn't notice it before as well, too lazy to go out and check again though. I'm sure if BMW didn't put it on the work order they didn't do anything they wouldn't want you to know about. __________________ National Capital Chapter BMW CCA #367673
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06-19-2010, 02:54 PM	#10
onefastman Major General 159 Rep 5,689 Posts Drives: 2009 135i 2011 e92m dct Join Date: Sep 2009 Location: Earth iTrader: (15)	Im very curious __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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06-19-2010, 04:18 PM	#11
ridin135 Colonel 131 Rep 2,408 Posts Drives: Depends on the day Join Date: Dec 2008 Location: Greenville iTrader: (7)	I have it also
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06-20-2010, 12:34 AM	#12
Marvelousone Private 9 Rep 52 Posts Drives: 2009 135i Join Date: Dec 2009 Location: Toronto, ON iTrader: (1)	Well if a lot of people have it, and still have the JB3 without issue, I dont think there should be a problem and I'll just re-install. That still doesnt answer a) What it is? b) Why its been added now? Shady is right... __________________ 2009 135i AT / CF Trim / ACS Pedals / Alpine HID 7000K / ST Coilovers / BMS DCI / VMR v701 18"/215/40 18"/245/35
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06-20-2010, 09:16 AM	#14
Marvelousone Private 9 Rep 52 Posts Drives: 2009 135i Join Date: Dec 2009 Location: Toronto, ON iTrader: (1)	Didn't know about this realOEM thing. Definately an option, I'll take a look later today. __________________ 2009 135i AT / CF Trim / ACS Pedals / Alpine HID 7000K / ST Coilovers / BMS DCI / VMR v701 18"/215/40 18"/245/35
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06-20-2010, 10:07 AM	#15
Dackelone European Editor 10528 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	yes, there is a search engine at the top left of the page, once you click on the ENTER button. Don't enter your car model info... just type in the part nunber in that top left window.
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06-20-2010, 12:20 PM	#16
jeremyc74 Banned 76 Rep 5,970 Posts Drives: '08 135i Montego/Terra Join Date: Feb 2008 Location: Evansville, IN iTrader: (0)	Judging by the size and number of wires coming in (two large ones and two small ones) it's some sort of power control relay. You'd be hard pressed to consume that much power in a module that small if it were something other than a relay without having some visible heat sinks. I doubt very seriously that this was retrofitted by the dealer during a service trip. I'd say it's more likely that it's always been there and you just didn't notice it under all the wires. From RealOEM: Last edited by jeremyc74; 06-20-2010 at 12:26 PM..
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