JB4 Tune DIY - BMW E9X 335i & E8X 135i (N54)

Instagram: SeanS54

How to install the BMS JB4 tune on your BMW 335i & 135i (N54 Engine).

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[Crazybobmundo]

I saw this video and then decided to install it. I research a task a lot before I tackle it to see common snags and obstacles one may encounter. The BMS guide didn’t seem helpful with their super close up pictures. I mean now that I’ve done it it makes sense. But your video was ten times more helpful than anything else I’ve searched online. I’ve had that tuner on my counter for 2 weeks now cause I was worried I didn’t fully understand the connections. So Thanks! Your video is gold lol
Next is deciding where to run that WMI line.

[thomasvuong]

You da man!! Just installed my JB4 using your DIY video!! Thanks a million!!

[FreePalestineFreePalestina]

Best JB4 install video I've seen, I feel confident now I can do this myself.

[seeforyourself]

Good one. I was going to use the sheet Burger provides but it was a little lacking with it's hand drawn arrows lol. Thanks!

[MarkusAeternum]

Hell yea man thanks a bunch this got me thru it. Much appreciated!

[atlantajunglepythons]

The one issue is that the ecu pushes back down as I try to reconnect it with the new harness plugs. 
So I'll find some way to hold it up!

[eddieellison]

How do you install with the Bluetooth?

[ssixerrr]

Just plug it in and I’m good to go? No programming or anything needed??

[bpcustomknives]

Just installed used JB4 and my car is in limp mode please help

[Nocturnal_Deity]

I connected it all and he car would crank but wouldn’t start. Took it out and started fine. Any ideas of what could have gone wrong? And before you ask I did connect the power wire to number 2

[Whtnw]

My car is throwing a limp mode after the install, could it be because of the ECU boxes not being lined up?

[sm]

Good guide, shame the process is just unnecessary. Cobb or RaceChip takes 5 minutes, and doesn't require removal of any parts

[timvdlee]

what do you preffer, JB4 or COBB? i cant make a choice..

[Chris-jjbk]

Where can you buy a JB4 and how mutch is it?

[mrm]

Can this be done on a bmw n52 325i e90 2006?

[Laylow]

Can doing this wrong mess your car up ?