JB4 experience

jat201990 · 09-22-2013, 09:51 AM

I am thinking about getting the JB4 stage 2 tune from BMS, but I have only had the car for 2 months. My main concern is if the dealer would be able to tell if I had the tune if I were to remove it and then take it in. They advertise that you can delete the tune detected codes so it would be untraceable. Any advise would be greatly appreciated.

granracing · 09-22-2013, 10:07 AM

I recently purchased a 135 and bought a JB4 tune kit as well as dual cone intake. Totally worth it! I purchased the system through one of their dealers, Fast Tech Limited (linked here). Jeremy is the owner; give him a call at 614-467-0033.

When I received the system, he even asked when I planned on doing the installation. I did it, had some confusion, sent him a text and he called me to help out. We exchanged a few texts, he sent me e-mails where I could find the information I was looking for (about the different maps and settings that I was having a hard time figuring out). Truly great to work with an fantastic customer service.

I've worked with him in the past with data acquisition systems and also had very positive experiences.

IF I needed to bring the car into the dealer, I'd do the delete and remove the system. At that point I wouldn't be worried about it. But like I said, give him a call and get his advice and experiences.

vertebra · 09-22-2013, 11:18 AM

From what I understand is that a tune leaves shadow codes that the dealer cannot access without taking the ecu out and sending it to Germany. They can however see how much boost the turbos were getting and that is a dead giveaway. Not sure if this info is correct, I read it on these forums.

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jat201990 · 09-22-2013, 11:33 AM

Thank you for the input I am still a little worried about purchasing it cause I dont want to void my warranty with some much left.

Andrewcoja · 09-23-2013, 01:40 AM

If you don't want to void the warranty, just look at it as something you can do in 50K miles to refresh your enthusiasm for your car.

ejm3 · 09-23-2013, 07:34 AM

I had a coversation with the [very helpful] tech at my BMW dealer.

We were talking and he said his car had a tune on it (I believe the JB4). He also has a 135.

I asked about the potential warranty issues and he suggested you remove it before brining the car in for service.

He said it is possible to still tell if the car had ever had a tune but it was difficult and unlikely it would get caught. He didin't elobrate any further but I didin't ask either.

So you're probably safe if you take the remove it before service but there's always a risk.

1thirtyfizzo · 09-23-2013, 08:24 AM

Get a Cobb and unmarry it b4 taking it in for service.

MuNkY6913 · 09-23-2013, 08:59 AM

Just call anonymously and ask the service MANAGER about all the mods you want to do. That's what I did. Turned out to be a really nice guy. The service counter guys were idiots an assholes but the manager is a nice guy. He said as long as its not something like I went to radio shack or best buy an had them install a radio or alarm and it fried the whole electrical system I should be alright. I've put mine in map 0 every time I've taken it in and never had a problem. A buddy of mine had the n55 an he went in for software update ad it said on his receipt that a tuner was detected. I don't think they flagged it and didn't deny him warranty work either. I would imagine its all up to what kind of dealer you have working for you. My service manager even said to me he knows there are alot of asshole dealers out there that flag everything and try to get out of doing work. He said he's not like that. Call them and see what they say. I didn't tell them my name or anything. I just said I had a car and I want to mod it. What will you do if I bring it in? See what they say.

c_ozanich · 09-23-2013, 09:40 AM

Quote:

Originally Posted by ejm3

I had a coversation with the [very helpful] tech at my BMW dealer.

We were talking and he said his car had a tune on it (I believe the JB4). He also has a 135.

I asked about the potential warranty issues and he suggested you remove it before brining the car in for service.

He said it is possible to still tell if the car had ever had a tune but it was difficult and unlikely it would get caught. He didin't elobrate any further but I didin't ask either.

So you're probably safe if you take the remove it before service but there's always a risk.

same thing my service advisor told me. I bought car CPO and during initial visit I asked if he could tell if previous owner did anything to void warranty. He said he doesn't have access to the ECU in a way that could tell and I left it at that.

RoundelM3 · 09-23-2013, 09:41 AM

Dealers around here say that if you keep it at 15 PSI boost or less, there shouldn't be any problems. If you start running more than that and you encounter issues, they likely won't cover repairs under warranty.

BEAR-AvHistory · 09-23-2013, 03:14 PM

Quote:

Originally Posted by vertebra

From what I understand is that a tune leaves shadow codes that the dealer cannot access without taking the ecu out and sending it to Germany. They can however see how much boost the turbos were getting and that is a dead giveaway. Not sure if this info is correct, I read it on these forums.

Posted from 1addicts.com App for Android

The ECU just sees stock boost with the JB4.

JimD · 09-23-2013, 03:40 PM

It's kind of a funny question. If you think a tune will damage your car, you shouldn't put it on, regardless of who pays for the repair. If you are confident that the tune will not damage your car, then there is no issue with the warranty. The only way that the tune impacts the warranty is if there is damage the dealer can show is caused by the tune. If there is no such damage, there is nothing the dealer can do (other than make noise).

There is always the possibility of something that is not related to the tune but the dealer will claim is related. I guess that is what you avoid by not installing the tune.

vertebra · 09-23-2013, 04:32 PM

Quote:

Originally Posted by BEAR-AvHistory

Quote:

Originally Posted by vertebra

From what I understand is that a tune leaves shadow codes that the dealer cannot access without taking the ecu out and sending it to Germany. They can however see how much boost the turbos were getting and that is a dead giveaway. Not sure if this info is correct, I read it on these forums.

Posted from 1addicts.com App for Android

The ECU just sees stock boost with the JB4.

So the JB4 increases the boost but tricks the ecu into thinking the boost has not been increased?

Posted from 1addicts.com App for Android

Andrewcoja · 09-24-2013, 11:12 PM

I think the ECU sets the boost and then the JB4 overrides that signal as it leaves the ECU.

wantm135i · 09-25-2013, 10:05 PM

just got the jb4 and coilovers (not installed) yet bam bam -

Upgrade+ · 09-28-2013, 01:25 PM

Nice! Start a build thread once you start. I'd be interested in seeing pics of what you do. I've always liked the looks of the X1

Quote:

Originally Posted by wantm135i

just got the jb4 and coilovers (not installed) yet bam bam -

mike@x-ph.com · 09-28-2013, 07:21 PM

The dealer wont be able to detect the JB4 if you remove it before going to the dealership. If you have more questions pm me

grunyon · 09-29-2013, 05:25 AM

If you put the JB4 on map 0, they can't detect it unless they take your ECU compartment apart and go looking for it.

Although one time I took my car in on tune 0 and got it back on tune 2... I think a lot of techs are catching on to what's out there.

On all my service intervals, I just left everything on it. The one thing I had to get replaced under warranty... a headlight... I left everything on too

TunedM2C · 09-29-2013, 07:26 AM

Quote:

Originally Posted by grunyon

Although one time I took my car in on tune 0 and got it back on tune 2...

Lol now that's funny!

09-22-2013, 09:51 AM	#1
jat201990 New Member 1 Rep 8 Posts Drives: 2013 135i Join Date: Jul 2013 Location: Landstuhl, Germany iTrader: (0)	JB4 experience I am thinking about getting the JB4 stage 2 tune from BMS, but I have only had the car for 2 months. My main concern is if the dealer would be able to tell if I had the tune if I were to remove it and then take it in. They advertise that you can delete the tune detected codes so it would be untraceable. Any advise would be greatly appreciated.
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09-22-2013, 10:07 AM	#2
granracing Private First Class 17 Rep 146 Posts Drives: Mazda Miata Join Date: Jul 2013 Location: CT iTrader: (0)	I recently purchased a 135 and bought a JB4 tune kit as well as dual cone intake. Totally worth it! I purchased the system through one of their dealers, Fast Tech Limited (linked here). Jeremy is the owner; give him a call at 614-467-0033. When I received the system, he even asked when I planned on doing the installation. I did it, had some confusion, sent him a text and he called me to help out. We exchanged a few texts, he sent me e-mails where I could find the information I was looking for (about the different maps and settings that I was having a hard time figuring out). Truly great to work with an fantastic customer service. I've worked with him in the past with data acquisition systems and also had very positive experiences. IF I needed to bring the car into the dealer, I'd do the delete and remove the system. At that point I wouldn't be worried about it. But like I said, give him a call and get his advice and experiences. __________________ Dave Gran Free Guide to Motorsports AND Car Reviews from an Enthusiast's Perspective GoAheadTakeTheWheel.com
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09-22-2013, 11:18 AM	#3
vertebra Lieutenant 21 Rep 493 Posts Drives: 2010 135i vert Join Date: Feb 2013 Location: Atlanta, GA iTrader: (0) Garage List 2009 Audi A4 Vert [0.00] 2010 BMW 135i Vert [0.00]	From what I understand is that a tune leaves shadow codes that the dealer cannot access without taking the ecu out and sending it to Germany. They can however see how much boost the turbos were getting and that is a dead giveaway. Not sure if this info is correct, I read it on these forums. Posted from 1addicts.com App for Android __________________
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09-22-2013, 11:33 AM	#4
jat201990 New Member 1 Rep 8 Posts Drives: 2013 135i Join Date: Jul 2013 Location: Landstuhl, Germany iTrader: (0)	Thank you for the input I am still a little worried about purchasing it cause I dont want to void my warranty with some much left.
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09-23-2013, 01:40 AM	#5
Andrewcoja First Lieutenant 9 Rep 385 Posts Drives: 2011 135i MSport Join Date: Aug 2013 Location: Texas iTrader: (0)	If you don't want to void the warranty, just look at it as something you can do in 50K miles to refresh your enthusiasm for your car.
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09-23-2013, 07:34 AM	#6
ejm3 Major 200 Rep 1,075 Posts Drives: 2012 135 Convertible 6MT Join Date: Nov 2011 Location: Connecticut iTrader: (0)	I had a coversation with the [very helpful] tech at my BMW dealer. We were talking and he said his car had a tune on it (I believe the JB4). He also has a 135. I asked about the potential warranty issues and he suggested you remove it before brining the car in for service. He said it is possible to still tell if the car had ever had a tune but it was difficult and unlikely it would get caught. He didin't elobrate any further but I didin't ask either. So you're probably safe if you take the remove it before service but there's always a risk. __________________ 2012 135 Convertible 6MT 2017 Acura MDX
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09-23-2013, 08:24 AM	#7
1thirtyfizzo Second Lieutenant 17 Rep 205 Posts Drives: E93 335i and E82 135i Join Date: Apr 2012 Location: Pennsylvania iTrader: (0)	Get a Cobb and unmarry it b4 taking it in for service.
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09-23-2013, 08:59 AM	#8
MuNkY6913 The Crowing 111 Rep 2,005 Posts Drives: BMW 135i Join Date: Feb 2010 Location: State College, PA iTrader: (4) Garage List 2009 135i [8.00]	Just call anonymously and ask the service MANAGER about all the mods you want to do. That's what I did. Turned out to be a really nice guy. The service counter guys were idiots an assholes but the manager is a nice guy. He said as long as its not something like I went to radio shack or best buy an had them install a radio or alarm and it fried the whole electrical system I should be alright. I've put mine in map 0 every time I've taken it in and never had a problem. A buddy of mine had the n55 an he went in for software update ad it said on his receipt that a tuner was detected. I don't think they flagged it and didn't deny him warranty work either. I would imagine its all up to what kind of dealer you have working for you. My service manager even said to me he knows there are alot of asshole dealers out there that flag everything and try to get out of doing work. He said he's not like that. Call them and see what they say. I didn't tell them my name or anything. I just said I had a car and I want to mod it. What will you do if I bring it in? See what they say. __________________ 2009 135i : BMS JB4 G5 ISO,CXRacing FMIC Kit,Injen Cold Air Intake,Evolution Raceworks Charge Pipe,Walboro Inline Fuel Pump, E85 BMS Backend Flash w/ 60% E85,BMS Meth injection (trunkmount),BMS dual meth nozzles,Spec stage 2+ clutch w/ steel SWFW,BMS Catless Downpipes,Berk Tech Race Axleback
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09-23-2013, 09:41 AM	#10
RoundelM3 Major General 1837 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	Dealers around here say that if you keep it at 15 PSI boost or less, there shouldn't be any problems. If you start running more than that and you encounter issues, they likely won't cover repairs under warranty. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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09-23-2013, 03:40 PM	#12
JimD Brigadier General 368 Rep 3,547 Posts Drives: 128i convertible Join Date: Apr 2009 Location: Lexington, SC iTrader: (0)	It's kind of a funny question. If you think a tune will damage your car, you shouldn't put it on, regardless of who pays for the repair. If you are confident that the tune will not damage your car, then there is no issue with the warranty. The only way that the tune impacts the warranty is if there is damage the dealer can show is caused by the tune. If there is no such damage, there is nothing the dealer can do (other than make noise). There is always the possibility of something that is not related to the tune but the dealer will claim is related. I guess that is what you avoid by not installing the tune. __________________ 128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09
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09-24-2013, 11:12 PM	#14
Andrewcoja First Lieutenant 9 Rep 385 Posts Drives: 2011 135i MSport Join Date: Aug 2013 Location: Texas iTrader: (0)	I think the ECU sets the boost and then the JB4 overrides that signal as it leaves the ECU.
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09-25-2013, 10:05 PM	#15
wantm135i Lieutenant 43 Rep 463 Posts Drives: x1 35i m sport Join Date: Jun 2013 Location: va iTrader: (0)	just got the jb4 and coilovers (not installed) yet bam bam - __________________
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09-28-2013, 07:21 PM	#17
mike@x-ph.com Joint Chiefs of Staff 24190 Rep 190,804 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	The dealer wont be able to detect the JB4 if you remove it before going to the dealership. If you have more questions pm me __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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09-29-2013, 05:25 AM	#18
grunyon Enlisted Member 16 Rep 36 Posts Drives: 2008 BMW 135i Join Date: Apr 2012 Location: Flemington, NJ iTrader: (1)	If you put the JB4 on map 0, they can't detect it unless they take your ECU compartment apart and go looking for it. Although one time I took my car in on tune 0 and got it back on tune 2... I think a lot of techs are catching on to what's out there. On all my service intervals, I just left everything on it. The one thing I had to get replaced under warranty... a headlight... I left everything on too
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