How To Install JB4 on a BMW G20 - B46/B48/B58

Here’s how you install JB4 on a 2019 and up 330i, M340i , 430i and M440i
Use my links below to buy anything and it really helps me out!
Thank you.
burgertuning.c...
JB+ Link:
bit.ly/3prnb7W
JB4 Link:
bit.ly/3fZRL5v
MHD OBD2 Wifi Adapter:
bit.ly/2T5Yim8
Downpipe
www.vr-speed.c...

[@rubioalejo]

It will be very interesting to hear your driving impressions on the differences in power and torque in these 3 levels > Thanks for this excellent detailed video!

[@mrduke2471]

Nice bro..definitely will look into the jb4..

[@EazyyMizyy]

How risky is it to tune your car? I have a 2020 g20 330i M Sport with a downpipe. I’m considering adding a tune.

[@Lonestreets]

Best video i have seen thank you 🫡

[@JerryPowerHouse]

Your videos are great. Will you start posting again?

[@josephg7875]

Mine didn’t come with a wastegate connector. Did you order this part separately or can you link the part for this?

[@CarlosAlberto-yu8cs]

Excellent vídeo bro, u help me a lot. I have a 2021 BMW 320 G20 B48B20B M package in Brazil . We cannot break CPU code. Then Just JB4 solve our power issue. Thanks!!

[@rearwheeled8147]

Appreciate the support!

[@MrTheGabriel321]

Meu conterrâneo Carlos, tudo bem? Gostaria muitíssimo de entrar em contato com você. Também aprecio uma 320i com motor flex e gostaria de algumas informações a respeito do jb4, será que poderíamos conversar? Abraços

[@CarlosAlberto-yu8cs]

​@@MrTheGabriel321oi Gabriel, tirei o jb4 pois não dava toda a potência que queira, acabei fazendo remap. Descobri por sorte que a minha CPU é desbloqueada. Estou com 255whp de roda e 45kgf.m

[@FastRedPonyCar]

It's been a while since this video. Still running the JB4?

[@glenbex]

Seems like i cannot plug the rainbow plug into the tmap. It only has 3 pins instead of 4 on my 2021 g21 320i.The map sensor has 4 pins where you connect the brown wires instead of 3 on your video. So i need to connect them orherwise then you have. Is this possible?

[@luis9555100]

Did you consider the Dinan V2 tuner? I'm on the fence between the JB4 and the Dinan tune. As Dinan offers a 5yr/50k new car warranty. Not sure what it's all about in terms of that. But sounds solid lol. I will be looking forward to your next video of your impressions bro!

[@rearwheeled8147]

I decided to go with JB4 because they are a slightly better priced. With Dinan it may be worth it if you live near an authorized Dinan Shop because they will have to be the ones to repair your car if the Piggyback causes any damage. I think people get worried that a piggyback like jb4 completely ends all warranty coverage under BMW. You still have your warranty even if they discover the piggyback and really they will only deny coverage if the issue can be linked to the modification you made.

[@Gunbro888]

Nice work bro 🔥☝️💪

[@ArshdeepSingh-pq2ze]

Bro i got my engine light turned on in my 2020 330i xdrive. It’s probably because of front grill. I saw the grill was simultaneously geting open and closed. But the main thing is I don’t know about the device which shows the code for the engine light. Can you make a video on that and suggest me a cheap and best device too

[@mariothomas1530]

What year is your 330i and did you get your dme unlocked to run this tune

[@chrismendez1547]

Thinking about getting this tune on my G22 would you do it all over again knowing the outcome

[@rearwheeled8147]

Yes i would!

[@will39490]

I have the same car. Do you think JB4 is safer than bm3?

[@rearwheeled8147]

I went with JB4 because I’m in a 2021 and currently the ECU is not unlockable by anyone. But to answer I wouldn’t say it’s safer, they are both really reputable options so I would consider them both to be fairly safe if you use them as intended and follow proper guidance. They are just different. JB4 is a piggyback and can be removed manually before taking to a dealer so many feel that it’s a safer to not be flagged by the dealership. Can the dealer still find out you’re using one? I’m sure they can if they look hard enough and see your logs and the amount of boost you’re producing, ect. but I don’t think many will look that hard without you already having a serious and expensive problem that needs to be fixed under warranty. Its the same with BM3, yes they can detect if they are looking but who’s to say how often they look? Could be often at one dealership and almost never at another.

[@Hardwaretuned]

@@rearwheeled8147 if you don't mind I'm gonna educate you on jb4. Jb4 is absolutely 100% untraceable by a dealership. It's post ecu so it does not show any increased boost on the ecu. Your ecu will not at any moment display higher readings than normal.

[@viswaasverma715]

Do you think this will work on my 2022 g20 cause my dme is locked so if I install this will i be able to tune my car even if that locked?

[@shkhehsaan]

How to do if you go for regular maintenance or oil change to dealership?

[@hoverauto2]

Will this work on the 2019 320i? I think it’s the Same B48 engine as the 330i, just detuned

[@rikesh23]

hi just a quick question the extra connection near the air filter, what is that for exactly?

[@shubdeepsingh8376]

Hi I just installed my jb4 but after installing I was trying to connect it via Bluetooth on the app but it would give me a error saying “ kit not owned “ I did buy it used but was told everything should transfer over to the car u put it on . Any advice ?

[@rearwheeled8147]

The previous owner must’ve forgotten to disconnect their jb4 account from the jb4 bluetooth. Ask them to give you the account and password or you can contact jb4 themselves and probably get unlocked somehow

[@shubdeepsingh8376]

Would I be able to fit a 2018 340 jb plus on my 21 330i (g20)

[@adhayansharma8853]

What numbers did u get with map 2?

[@marcs8991]

Hey I got my 330 I love it but I should have gone for the m340

[@rearwheeled8147]

Understandable, everyone has their own feelings

[@marcs8991]

@@rearwheeled8147 I still love the car I am coming from a Nissan rouge so it's a huge upgrade. I also got the adaptive cruise. I noticed you can't add it on the 330 anymore.

[@joestha1]

Yeah but you would need an extra 10k to 15k hanging around… i got a used 2021 g20 with a sports package with 5k on the dash. I traded in my 2014 f30 worth 10k it brought it down my total price to about 32k. Unless your cool with paying nearly $1000+ a month I think you made out good.

[@nicholasmartino7346]

Hi I have 21 m440 and I just got the jb4 as well running on map 4 on 93 octane is that safe?

[@rearwheeled8147]

Yes its usually safe with 93 alone but check your trims and afr when logging. Each car may handle a map a bit differently. Feel how the car is handling the extra boost, if it’s not feeling smooth you may decide to add a little e85 or go to a lower map. But you should be fine

[@madaxism]

which one do you think is better jb4 or jb plus?

[@rearwheeled8147]

Jb4 is honestly the better option on the end. More control, more power if desired and a code reader built in. Jb+ is nice for the budget but jb4 all the way

[@madaxism]

@@rearwheeled8147 which map do you run on the jb4? ABC’s it’s it a noticeable defiance in power compared to the jb+? Also. Did you sell your jb+?

[@rearwheeled8147]

I sold my jb+ after i purchased jb4, no need for both. Jb4 is nice because if you can customize quite a bit adjust settings to match your car. But there is default maps to play with. I usually went around in Map 2 when i first purchased. If you do buy i feel like the bluetooth connection is a must to keep track of your logs

[@kavgun0291]

Good video! Exhaust next? There’s an eisenmann exhaust I’ve been thinking of getting for mine too :)

[@rearwheeled8147]

Theres a few out there. We’ll see!

[@frankyakou6045]

How do you change the maps if you don’t have app? Can someone direct me

[@titog1948]

just get the app

[@MrMeep1999]

Will this void a lease? Also will bimmercode or any coding void a lease or warranty?

[@rearwheeled8147]

The warranty does not just get completely voided based on coding or a piggyback but they may deny a warranty claim if they link an issue or damage to the mod you made. Say you get a piggyback and you push it to hard and end up with a blown chargepipe, ect. BMW may look at your car, run some tests and notice you had increased boost levels with jb4, they may then deny to cover your chargepipe. But if the issue had nothing to do with jb4, coding, ect. then your warranty will cover it.

[@MrMeep1999]

@@rearwheeled8147 ok, I was planning on coming sport plus, better exhaust pops, and some minor aesthetic things on mine. Does bimmer code have a setting that is just the default so if I do have an issue I can quickly reset it?

[@rearwheeled8147]

Yes, you can restore to a backup date

[@MrMeep1999]

@@rearwheeled8147 Thanks! I love your vids, I was planning on getting a BMS b48 intake, do you have any plans for an intake? Love the vids btw, seriously super helpful for me!

[@luisangel7661]

Does this remove the speed limiter ?

[@rearwheeled8147]

No it does not unfortunately

[@groenesmurf6193]

Have you done any exhaust mods ?

[@rearwheeled8147]

Nothing at the moment besides coding in Sport Plus which makes the exhaust a bit more aggressive and coding in an option to keep the exhaust valve open.

[@groenesmurf6193]

Asking from Europe does you’re 330i make fart sound when upshifting ?

[@marcs8991]

I'll be afraid I'll fuck Something up

[@rearwheeled8147]

Follow the instructions and you’ll be fine.

[@user-bb6nw2fr8p]

Where is the beef? no acceleration?....weak bro.....

[@nicolasb5403]

Want power- get m340i

[@joestha1]

You need to be able to afford it. Jb4 and down pipe will get you pretty close to a stock 340 sans the 15k difference.

[@titog1948]

@@joestha1ehh not rlly i feel you would need to unlock your ecu to be closer to a 340