SKU: 70214845460

MINI B38/B46/B48 JB4 Tuner

$239.40 $266.00
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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

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Description

MINI B38/B46/B48 JB4 TunerReady to take your MINI B38 B46 B48 turbo to the next level? The JB4 is the most advanced and highly featured tuning system available for your B38 B46 B48 MINI. Power gains are up to 40hp to the wheels (55hp crank) for a B48, gains with bolt on parts, higher octane, E85 mixtures, and larger turbos are even higher. The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune.

Ready to take your MINI B38/B46/B48 turbo to the next level?

The JB4 is the most advanced and highly featured tuning system available for your B38/B46/B48 MINI. Power gains are up to 40hp to the wheels (55hp crank) for a B48, gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher. The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune. Including on the fly in dash map switching between factory and various performance maps, optional in dash gauge displays for boost, boost limiting by gear for improved traction in lower gears, E85 fuel support, progressive water/methanol support, built in data logging, built in code reading, and much more.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization but for more advanced enthusiasts the BMS DATA cable allows you to connect via a laptop for data logging and free software updates. Made in the USA. 5 Year Warranty.

Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development. Separate JB4 Mobile app purchase is also required.

The latest B38/B46/B48 map guide, feature set, firmware updates, and directions are posted here.

 

JB4 Features & Benefits

• Power gains of up to 40hp to the wheels on a stock vehicle
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 tuning software and up to 8 maps for various fuel and modification levels
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• View and record up to 40 different gauges/engine parameters in real-time with the JB4 app.
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
• Quick Plug & Play Installation
• CANbus OBDII integration offering unrivaled tuning features and performance
• Improved performance over non-integrated chip tunes
• Runs as smoothly as stock, this is how your vehicle should have come from the factory
• Compatible with all driving modes
• Fuel economy unchanged during normal driving
• 91 octane fuel or better required for performance gains
• Not VIN locked and can be removed without a trace and resold down the road
• Includes the rugged JB4 billet aluminum enclosure for protection
• Made in the USA
• Free USA Shipping
• 5 year warranty

Applications:

MINI B38/B46/B48
• 2014+ F57 Cooper S
• 2015+ F57 Cooper JCW
• 2014+ F55/F56 Cooper S
• 2015+ F55/F56 JCW
• 2018+ F55/F56 MINI One

• 2017+ F60 Countryman S 
• 2017+ F60 Countryman S ALL4
• 2018+ F60 Countryman JCW ALL4

• 2016+ F54 Clubman S
• 2017+ F54 Clubman S ALL4
• 2017+ F54 Clubman JCW ALL4

If you don't see your B38/B46/B48/B58 powered vehicle or year listed here please email us. 


What is a JB4?

The JB4 is a plug & play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. While it's not the only tuning system that operates this way the JB4 separates itself from the competition with much more advanced connection points and processing including CANbus, fuel & spark control, Bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. In addition, the JB4 system is not VIN-locked to your vehicle and can quickly be removed and swapped between cars or resold at a later time. Often imitated but never duplicated the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade.


 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 70214845460

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Deanna Thurmond
Belleville, US
★★★★★ 5
Great security features.
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Works great I just wish the battery last longer.Nightvision is great as well weather proof.Sticks up and is sturdy as well.
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Reviewed in the United States on May 20, 2026
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nmd
Alexandria, US
★★★★★ 5
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Great camera for outdoor security. The features on the app have been updated and work better than the Ring Doorbell. The camera has a great live picture, and the sound is very clear.
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Reviewed in the United States on April 23, 2026
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Dexter
Cuba, US
★★★★★ 5
Quality Cameras
Size: 2 Cameras
Love these Cameras. Great clear quality and super easy to set up! If you are looking to add a camera or camera system, you can't beat the price and quality of these
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Reviewed in the United States on May 18, 2026
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GuitarRebel
Fort Morgan, US
★★★★★ 5
Read this if you're having connection or audio/video/notification difficulties ***UPDATED at end***
Before I start my revised review, let me state that there's been a lot of news lately about people hacking into Ring cameras, but this only happens when someone installs a new camera and doesn't update the default username and password (or has an extremely weak password which is easy for a hacker to guess). This is like leaving your front door open while on vacation. Your camera is sending and receiving signals over a wireless network. Anyone within range of the signal can potentially be a threat if you don't have good encryption (username and good password) set up on your camera. There's no logical reason for a Ring owner to not do this. Ring even stresses changing the default settings during the initial setup process. Bottom line, don't blame the car manufacturer if you leave the keys in your car and it gets stolen. ---------------------------------------------------------------------------------------------------------------------------------------- Recently, I wrote a rather scathing 1 star review about the problems I was having with my new Ring Stick Up Wireless Battery Cam. I'm no stranger to wireless cams, having 10 hooked up and running seamlessly on another network as I write this, but I was totally frustrated with the connection reliability, not only with my two upper end cellphones, but also on my Galaxy Tab and Amazon Show. More times than not, the software wouldn't connect with the camera but when it did, the video was choppy. Notifications were also hit and miss. I have a great wireless mesh router system throughout the house, so after doing all the troubleshooting I could think of, I assumed it was due to faulty hardware or software. I gave up and started the return process through Amazon. It was a new product after all and new products sometimes are really buggy. Plus, I read other negative reviews which seemed to justify my thoughts and actions. Then I got an email from a gentleman from Ring saying he read my review and asked if I'd be willing to let him help troubleshoot my issues with me. Although I had already started the return process, I was willing. It was refreshing to know Ring Customer Service was genuinely interested in troubleshooting possible defects in their newest product. Together, we isolated the issue within about 20 minutes. It turned out it wasn't the camera or software after all. Anyone having connection issues should do what he advised me to do. Open up the Ring app and click on the 3 little dots to the upper right of the camera screenshot, then select settings. From there go to Device Health and check the signal strength. Although I had a good mesh hub (inside) within 10 feet of my camera (mounted outside), my signal strength was RSSI -64. He stated that the signal was so weak it was on the cusp of what is needed for the camera to even minimally operate. This prompted me to reboot my wireless mesh system and reset/reconnect the camera. When it came back online, my signal strength went to -39, a vast improvement. A quick check of all of my devices showed the camera and software working flawlessly. Hat's off to Ring. Anyone who may be having connection or audio/video/notification difficulties, check your signal strength to the camera via the Ring software, even if your router is close by. You just might be surprised. ***UPDATE*** Camera (and software) is still working flawlessly on all devices. Ring has now updated their Windows 10 desktop app (which previously didn't work with the new wireless battery cams) and it works flawlessly as well. Observations. Notifications on my phone, Tab and Amazon devices (Show, Echo, Dot) are almost instantaneous. Alexa says "Someone is at your front door." Very cool. I bought an extra battery, but it looks like it'll be at least a few months before I need to swap it out, even with the intensive testing I've done on the Stick Up Cam. Battery life seems excellent. I have one zone blocked out and that seems to work fine as well. I also have it mounted a couple of feet above and to the left of my front door, tilting downward at an angle. Even though residential traffic is visible in the field of view, I've not gotten one trigger due to street activity. The motion sensor is triggered by anything coming into the bottom half of it's field of view. From the time someone triggers the motion sensor until the time I'm aware of it is 1-2 seconds. That's about as close to real time as you can get. It's not given me a false alarm even once. Telling my Amazon Show to "(Alexa), show front door cam" takes about 5 seconds to complete. I can also watch triggered video clips and get a live feed while away from home without any extra setup to my network. It's totally automatic. Because of the customer service I received from Ring and the fact the product is much better than I originally thought, I will be expanding my Ring family soon.
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Reviewed in the United States on October 29, 2019
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Verified Purchase
Amanda Breazeale
Los Angeles, US
★★★★★ 5
Reliable camera with solar keeps it running
Size: 1 Camera
I’ve been running this camera with the solar panel and it’s been solid. The video quality is clear day and night, and the motion alerts come through quick without a lot of false alarms. Setup was straightforward and didn’t take long. The solar panel has been a big plus. It keeps the battery charged so I don’t have to mess with taking it down to recharge. As long as it gets decent sunlight, it stays topped off. The app is easy to use and lets me check things anytime without issues. It’s held up well in the weather so far. Overall, it does what it’s supposed to do and gives me peace of mind. I’d recommend it if you want something low maintenance.
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Reviewed in the United States on April 14, 2026

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