08-23-2019, 02:49 PM | #1 |
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2020 M340i JB4
Hi all,
New here, and new to BMW. Picked up a 2020 m340i xDrive and i love it. However I'm trying to figure out if i can use a JB4 on my car. My buddy purchased one for me as a gift, but i am hesitant to put it on the car because i dont know if its compatible and/or if it will throw any error codes and whatnot. Any information is greatly appreciated. Thank you!!! |
08-23-2019, 03:58 PM | #3 |
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08-23-2019, 04:54 PM | #7 |
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i did watch the video, guess i'll see how mine looks in comparison so i can stash it. another member told me there's a perfect place for it. yeah it's brand new with the wireless connector :-) i'm about to download the app as well. thank you!!
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08-23-2019, 08:28 PM | #9 |
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08-23-2019, 09:39 PM | #11 |
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Would love to know how they compare as well
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08-23-2019, 10:23 PM | #12 |
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08-24-2019, 10:27 AM | #13 |
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I transferred mine from my previous 340i to the new M340 about a month ago, no issues so far. I need to buy the BT kit as JB4 doesn't have dash compatibility with the digital cockpit, which is what I relied on for changing maps and deactivating. Also, I couldn't figure out how to enable (if it even works at all) the can flap open feature since that was only accessible from the stalk controls (no controlability from the PC application over USB).
As far as performance, it's been great so far but I don't regularly push it to max boost levels. It is definitely making a difference being set on Map2 in my case. Last comment, install was pretty straight forward and comparable except for one aspect in my opinion. Getting through the firewall. There is a black plastic piece in the area of the drivers side hood hinge that needs to be removed. It takes some finagling but it can come out without damaging anything. Once that is removed, it's fairly easy to punch through the silver metallic sticker that covers the access into the drivers footwell. I used a fish tape and didn't even have to remove any lower plastic pieces in the footwell, as I was able to wiggle the fish tape to pop out around the OBDII connection, then feed the small end of the JB4 cable back through to the engine compartment. Everything tucked in nicely into the area under the plastic cover. Last edited by evermire; 08-24-2019 at 10:42 AM.. |
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08-24-2019, 10:48 AM | #14 |
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08-24-2019, 01:07 PM | #15 | |
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Quote:
map 2 |
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08-25-2019, 04:04 PM | #16 |
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08-25-2019, 04:13 PM | #17 | |
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Anyhoo are you open to putting your car on a dyno and hanging out for an hour or so while we do the same with a flashed car? |
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08-25-2019, 04:53 PM | #18 | ||
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Quote:
Also, grab some real life 0-60 and 60-100 stats.
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08-26-2019, 03:02 PM | #20 | |
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I would be available for that if you still looking for somebody. I can be available this coming weekend. Let me know |
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08-27-2019, 11:41 PM | #21 | |
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They call me after having it for a day (they were busy) and told me that the engine code was related to over boosting and A/F ratio variance. They say it's related to the 'flash' and that I need to actually remove it from the car and bring it back in for them to see if anything really happened. I'm calling BS on most of it, given that they wern't even able to correctly identify the JB4 in the first place, but I have no tool or way of checking G series fault codes (or clearing them) myself currently. The JB4 doesn't officially support this chasis yet. Anyways, kind of unsure what to do at this point given they noted it on my paperwork For now it is disabled. |
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08-28-2019, 08:10 AM | #22 |
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I think autozone will read your cel code for free. At least they used to
I would try another dealer. Sounds like if there’s anything actually wrong with your car they’re going to blame your tune |
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