N20/N26 BMW JB4
- Description
- CARB RESTRICTED ITEMS
- Shipping and Returns
Instant power with easy plug & play installation
Ready to take your BMW N20 turbo to the next level? How about up to 50hp to the wheels (65hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune. Including the ability to enable/disable the tuning from the driver's seat, gear-dependent boost control to help with traction, E85 compatibility, built-in diagnostic code reading/deleting, expanded engine safety systems, free firmware updates, in dash boost gauge, the ability to control the exhaust flapper using your BC button, and much more.
No ECU flash needed and compatible with locked 🔒 ECUs
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. For more advanced enthusiasts, the BMS DATA or JB4 Mobile cable allows you to connect a laptop or smartphone for additional gauges, data logging, and free firmware updates as we add new features and maps. Also, note some F10 and X chassis models require a JB4 mobile adapter or BMS data cable to select options bit#1 to enable the in-dash controls for those models.
The JB4 is a full plug and play device that installs and removes in minutes at home without special tools and unlike flash maps that permanently write over your DME with the JB4 your DME is never aware it's running more than the factory power levels. And when you're ready to change things up the JB4 is not VIN locked and can be moved to your next vehicle or resold.
NOTES: The X1 & Z4 N20 JB4 is very different than the F series N20 JB4. They use special firmware (with full dash control) and have a different CAN mounting location. The firmware is below and labeled for the X1/Z4 series N20. X1 N20 JB4 Install video & details here.
Wirelessly Connect to your JB4: Grab one of our smartphone connection options to wirelessly connect the JB4 BMW tuner to your Bluetooth 4.0 compatible iOS or Android device. 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.
JB4 Mobile by DMAC was released in 2014 and has become the gold standard for phone-to-tuner integration with its unique gauge display options/themes and advanced security systems. The JB4 Mobile app is purchased separately for $29 and requires the JB4 Mobile adapter.
JB4PRO by Burger Motorsports is our brand-new in-house adapter designed from the ground up for ease of use and reliability. Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look. The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns. More information on the differences between the app options is available here.
JB4 Features & Benefits
• Power gains of up to 50whp and 60wtq to the wheels on a stock vehicle
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 BMW 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 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
• Designed and assembled in the USA
• 5-year extended warranty
Vehicle Fitment
2 Series
• 2014-2016 BMW 2 Series F22 F23 220i 228i N20 & N26 2.0L TURBO 4 CYL - all vehicles select (EWG) Electronic Wastegate version
3 Series
• 2012-2016 BMW 3 Series F30 F31 320i 328i N20 & N26 2.0L TURBO 4 CYL
4 Series
• 2014-2016 BMW 4 Series F32 F33 420i 428i N20 & N26 2.0L TURBO 4 CYL - all vehicles select (EWG) Electronic Wastegate version
5 Series
• 2011-2016 BMW 5 Series F10 520i 528i N20 & N26 2.0L TURBO 4 CYL
X Series
• 2011–2017 F25 BMW X3 xDrive20i, xDrive28i 2.0L TURBO 4 CYL
E chassis X1 and Z4
• 2013-2016 E89 BMW Z4 28i 2.0L TURBO 4 CYL - select E Series X1 & Z4 in dropdown
• 2013-2015 E83 BMW X1 28i including xDrive 2.0L TURBO 4 CYL - select E Series X1 & Z4 in dropdown
Wastegate Identification Chart. Pneumatic (PWG) or Electronic (EWG)?
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.
DYNO RESULTS
BMW 328i on pump gas dyno
BMW 320 JB4 dyno
BMW 328 E85 dyno
Please Note: Competition off-road course only products are not CARB compliant and are for off-road and racing use only. By purchasing from CMBuildz, you understand that these may only be used for off-road and racing use only for unregistered vehicles. Please check with your local, state, and federal laws to see if these products are legal for use in your area. By purchasing any products from CMBuildz, you understand and agree to these terms and accept all liability.
CARB restricted products do NOT ship to addresses that are restricted.
If you are receiving a "Some items in your cart can't be shipped to the provided address" error upon Checkout, then you must remove any CARB restricted items from your cart to complete check out.
All Parts sold are considered Racing Products that are for Competition Off-Road use only.
By purchasing any and all products and completing your cart check out, you are agreeing with CMBUILDZ terms and conditions and understand that some items in your cart might not be able to ship to certain addresses / states due to CARB restrictions and that these products will only be used on Competition Closed Course applications.
CMBUILDZ is not responsible for mis-use of any products nor is responsible for any return/refund costs.
Where do you ship to?
Currently we only ship Domestically in the U.S.A to all U.S. Addresses which include all 50 states and regions. We do not currently ship internationally.
How long do orders take to ship?
We are typically very quick and have a 24-48 hour turnaround time (this applies to products we have readily available at the warehouse and not a product that requires special order). Transit time depends on your order and which warehouse we are shipping from, but typical transit times are between 5-7 business days from one side of the US to the other. Larger items like bumpers and exterior conversions can take up to 10 business days to get you from time of shipment.
What's your domestic shipping policy?
All domestic orders will be shipped to the verified billing address associated with the customer’s credit card. In the event that the products need to be shipped to another address, CMBUILDZ will verify the transaction with the customer by requesting a screenshot of our transaction on the customers online banking portal. Similar to how PayPal verifies orders, CMBUILDZ has implemented an authorization program that will display a unique code on the credit card transaction next to where the “CMBUILDZ” name appears. Other means of verification may also be required depending on the situation. We thank you in advanced for your cooperation.
What's your policy on advertised pricing?
All prices are subject to change without notice. In the event that an incorrect price is listed or advertised, CMBUILDZ reserves the right to refuse or cancel any orders at the incorrect price.
Returns might be subject to a restocking fee
A 20% restocking fee may be applicable on all authorized returns, canceled orders (special or otherwise, shipped or unshipped) in addition to any original shipping fees.
