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Old Mar 12, 2019 | 03:56 PM
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People buying used JB4s

Just a heads up for everyone looking to buy used JB4s.

Burger will not help you with any issues alterations to the tune or look at your logs unless you buy the JB4 from them new.


My plan was to buy a used Jb1 and upgrade to a JB4 and burger said they would not help me if I had any issues.

Being as every car and climate is unique I figured the extra cost was worth it for me to buy direct.
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Old Mar 12, 2019 | 08:36 PM
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Originally Posted by Dieseldan9
Just a heads up for everyone looking to buy used JB4s.

Burger will not help you with any issues alterations to the tune or look at your logs unless you buy the JB4 from them new.


My plan was to buy a used Jb1 and upgrade to a JB4 and burger said they would not help me if I had any issues.

Being as every car and climate is unique I figured the extra cost was worth it for me to buy direct.
This would be common sense to me. They’d be flooded with emails who bought a JB4 for the N54 which has been resold 8x and barely works.

Wanting second hand pricing and first hand service is a cheap move.
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Old Mar 13, 2019 | 09:20 AM
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This why I purchased mine new, wanted the company backing.
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Old Mar 13, 2019 | 09:46 AM
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Thanks again, Dan, for the heads up! I ended up buying direct from BMS.
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Old Mar 13, 2019 | 10:13 AM
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What if you buy a used car that has JB4 already? They no longer support because it changed hands?

I understand the reasoning behind this and am all about supporting smaller companies, but what if Mercedes no longer honored warranty because the car changed hands? Or other tuning companies like Cobb?

Last edited by bzammitt; Mar 13, 2019 at 12:45 PM.
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Old Mar 13, 2019 | 12:34 PM
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Originally Posted by bzammitt
What if you buy a used car that has JB4 already? They no longer support because it changed hands?

I understand the reasoning behind this and am all about supporting smaller companies, but what if Mercedes no longer honored warranty because the car changed hands? Or companies other tuning companies like Cobb?
that I am not sure, I would contact them to see what they can do.
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Old Mar 13, 2019 | 02:58 PM
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WOW, glad i read this post. Thanks for the heads up!
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Old Mar 13, 2019 | 05:30 PM
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What kind off trap speeds are guys getting with the Jb4 tune only on stock intake and stock downpipes? So 93 octane and tune only?
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Old Mar 13, 2019 | 09:17 PM
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While we're only able to provide direct support and warranty to the orignal purchaser, those who purchase used can still take advantage of our MB support forum and receive indirect support that way. Generally speaking if you're new to tuning and expect to need some help, best to buy new. If you've been around the block and are already familiar with the JB4 or similar systems, then you can save a few bucks buying used.
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Old Mar 14, 2019 | 06:23 AM
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Originally Posted by BMS
While we're only able to provide direct support and warranty to the orignal purchaser, those who purchase used can still take advantage of our MB support forum and receive indirect support that way. Generally speaking if you're new to tuning and expect to need some help, best to buy new. If you've been around the block and are already familiar with the JB4 or similar systems, then you can save a few bucks buying used.
Thanks for clearing that up!! I just bought a used JB4 and it arrives tomorrow, can't wait I don't expect to need any help, but if I do, i'll head over to N54 tech.
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Old Mar 14, 2019 | 07:24 AM
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Originally Posted by BMS
While we're only able to provide direct support and warranty to the orignal purchaser, those who purchase used can still take advantage of our MB support forum and receive indirect support that way. Generally speaking if you're new to tuning and expect to need some help, best to buy new. If you've been around the block and are already familiar with the JB4 or similar systems, then you can save a few bucks buying used.
Agreed the JB4 has a steeper learning curve than JB1.

IMO based on what I have read here if you go JB4 it is best to have the help of BMS to look at logs and suggest alterations to get the maximum benefit from the extra cost of the JB4
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Old Mar 14, 2019 | 07:37 AM
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Originally Posted by bzammitt
What if you buy a used car that has JB4 already? They no longer support because it changed hands?

I understand the reasoning behind this and am all about supporting smaller companies, but what if Mercedes no longer honored warranty because the car changed hands? Or other tuning companies like Cobb?
Why would that matter? JB4 doesn’t provide a power train warranty anyways.
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Old Mar 14, 2019 | 08:57 AM
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Originally Posted by threefirs
Why would that matter? JB4 doesn’t provide a power train warranty anyways.
why would what matter? I think you misunderstood my point or maybe it was unclear.
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Old Mar 14, 2019 | 02:50 PM
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Originally Posted by threefirs
Why would that matter? JB4 doesn’t provide a power train warranty anyways.
This is true and very few companies in any industry provide a transferable warranty on their products, why would they? If you buy it off someone, you are getting is second hand and you didn't buy from the company or authorized retailer, why should they offer customer support to you?

Last edited by Lazz83; Mar 14, 2019 at 02:55 PM.
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Old Mar 15, 2019 | 11:49 AM
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Originally Posted by Dieseldan9
Agreed the JB4 has a steeper learning curve than JB1.

IMO based on what I have read here if you go JB4 it is best to have the help of BMS to look at logs and suggest alterations to get the maximum benefit from the extra cost of the JB4
I was unaware of this. I will definitely be talking to them once I get the JB4 on.
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Old Mar 15, 2019 | 06:52 PM
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Originally Posted by MarcusDubya77
I was unaware of this. I will definitely be talking to them once I get the JB4 on.
That is only if u use the custom map option and build your own map. If u use the out of the box map bms offers you are good to go
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Old Mar 16, 2019 | 03:54 AM
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Originally Posted by Dieseldan9
That is only if u use the custom map option and build your own map. If u use the out of the box map bms offers you are good to go
I see. I had seen traffic where users had different numbered maps. I need to get smart on BMS. Plan on forking over the $27.99 for the app. Hope there aren't any issues running it on the networks here.
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Old Mar 16, 2019 | 02:44 PM
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Originally Posted by MarcusDubya77
I see. I had seen traffic where users had different numbered maps. I need to get smart on BMS. Plan on forking over the $27.99 for the app. Hope there aren't any issues running it on the networks here.
Yes rhe custom maps make the most power and usually are the most aggressive

The app unleashes the true potential of the extra cost of the jb4


IMO is must have
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Old Mar 17, 2019 | 03:07 AM
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Originally Posted by Dieseldan9
Yes rhe custom maps make the most power and usually are the most aggressive

The app unleashes the true potential of the extra cost of the jb4


IMO is must have
Thanks. Are the custom maps downloadable? I have read that N54 forums is the best resource for JB 4 info.
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Old Mar 17, 2019 | 08:53 AM
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Originally Posted by Dieseldan9
Just a heads up for everyone looking to buy used JB4s.

Burger will not help you with any issues alterations to the tune or look at your logs unless you buy the JB4 from them new.


My plan was to buy a used Jb1 and upgrade to a JB4 and burger said they would not help me if I had any issues.

Being as every car and climate is unique I figured the extra cost was worth it for me to buy direct.
Just wanted to say I bought a used JB4 and love it. Also, terry looked at my logs and responded in about an hour on N54tech. Not encouraging people to buy used vs new, but if one pops up for a good deal, hey at least you’re still supporting the company and getting their good word out there! The car pulls super hard now, can’t wait to try the E30 map
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