How do i know if my 335i has a jb4 installed?

Diaz335i · 03-12-2016, 03:39 PM

Now i bought this car awhile ago its a 2007 bmw 335i coupe, now i have found a few sheets in the glove compartment noting a few things abt dif jb4 maps n such now i have no clie if a jb4 is already installed as i bought the car used n nvr asked and im going to buy a jb4 but dnt wanna buy one for no reason. Need sum help guys noob here. How do i check to see if i have a jb4 i stalled.

maddmatt02 · 03-12-2016, 03:45 PM

well go over to n54tech and find the e series jb4 sticky and it has everything you'd need to know. but press both volume down and the down arrow on the right side of steering wheel as well. if the gauges change, you got a jb4. and if it does change just press volume down again to exit. don't mess around until you read what to do once in the menus. if nothing happens then you probably don't have one. I think there's an option in the computer program to disable steering wheel controls. never done it myself, and see no need to but that just means I cant 100% guarantee you don't have one if nothing happens.

the surest way is to go download the install directions, pull the cowl/dme cover and see if you have one. if not its safe to leave the cowl off until your jb4 arrives, just make sure you don't run around without the dme box cover installed.

xyaaeg234g234 · 03-12-2016, 03:46 PM

Pop the hood and see if you see it in the ECU box - check burger tuning site to know what to look for.

Also check this video on how to engage controls and see if it works on your car.

335NJ · 03-12-2016, 05:00 PM

Press volume down and track arrow down at the same time.

Sertone777 · 03-13-2016, 12:56 AM

+1 to the above. I thought the same thing too and I asked the same question . I thought my car jb4 when I bought it because I had a USB coming out of my glove box. Finally got around to open the hood and removing the cowl and discovered in the ECU compartment it was just a dead end wire. So I buttoned it up and left the wire .
I went with MHD flash tune anyhow . Cars in beast mode now , and so much of daily driver capable with consistent power over stock setting. (Bragging)

03-12-2016, 03:39 PM	#1
Diaz335i New Member 4 Rep 22 Posts Drives: 2007 BMW 335i Coupe Join Date: Apr 2015 Location: West Hazleton, PA iTrader: (0)	How do i know if my 335i has a jb4 installed? Now i bought this car awhile ago its a 2007 bmw 335i coupe, now i have found a few sheets in the glove compartment noting a few things abt dif jb4 maps n such now i have no clie if a jb4 is already installed as i bought the car used n nvr asked and im going to buy a jb4 but dnt wanna buy one for no reason. Need sum help guys noob here. How do i check to see if i have a jb4 i stalled.
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03-12-2016, 03:45 PM	#2
maddmatt02 Private First Class 8 Rep 117 Posts Drives: alpine white e90 Join Date: Jan 2016 Location: WA/USA iTrader: (0)	well go over to n54tech and find the e series jb4 sticky and it has everything you'd need to know. but press both volume down and the down arrow on the right side of steering wheel as well. if the gauges change, you got a jb4. and if it does change just press volume down again to exit. don't mess around until you read what to do once in the menus. if nothing happens then you probably don't have one. I think there's an option in the computer program to disable steering wheel controls. never done it myself, and see no need to but that just means I cant 100% guarantee you don't have one if nothing happens. the surest way is to go download the install directions, pull the cowl/dme cover and see if you have one. if not its safe to leave the cowl off until your jb4 arrives, just make sure you don't run around without the dme box cover installed. __________________ 07 A/W 335i 6AT/JB4/race BEF/FSB METH CM5/VRSF DP/DCI
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03-12-2016, 03:46 PM	#3
xyaaeg234g234 happy. 138 Rep 464 Posts Drives: 2009 e90 335i Join Date: Jun 2009 Location: palm beach county iTrader: (4)	Pop the hood and see if you see it in the ECU box - check burger tuning site to know what to look for. Also check this video on how to engage controls and see if it works on your car. __________________ '09 Jet Black E90 335i \| BMS DCI \| Forge DV \| VRSF CP, DP, 7" FMIC, Exhaust \| MHD Stg 2 / 93 Oct \| Koni Yellow / H&R Sport \| Mooooarrrrrr this list is getting too long.....
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03-12-2016, 05:00 PM	#4
335NJ Colonel 533 Rep 2,872 Posts Drives: 2008 335i 6MT E90 Join Date: Feb 2014 Location: NJ/Philadelphia Suburbs iTrader: (1)	Press volume down and track arrow down at the same time.
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03-13-2016, 12:56 AM	#5
Sertone777 Private 12 Rep 57 Posts Drives: 2007 335i coupe / silver Join Date: Nov 2015 Location: Boston Ma iTrader: (0)	+1 to the above. I thought the same thing too and I asked the same question . I thought my car jb4 when I bought it because I had a USB coming out of my glove box. Finally got around to open the hood and removing the cowl and discovered in the ECU compartment it was just a dead end wire. So I buttoned it up and left the wire . I went with MHD flash tune anyhow . Cars in beast mode now , and so much of daily driver capable with consistent power over stock setting. (Bragging)
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