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Ready to take your F chassis N55 BMW to the next level? How about up to 60hp to the wheels (80hp 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, autotuning for E85 mixtures, 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.
The JB4 Tuner 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.
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. Made in the USA. 5 Year Warranty.
Note for electronic wastegate models, the EWG add-on connector remains optional and can be purchased separately from our upgrades for higher HP applications where direct EWG control is beneficial, such as those using an integrated WMI kit or larger turbo.
Note for 2018+ G chassis vehicles with the digital dash layout, we have not yet added in the JB4 commands to allow in-dash control but will provide those via a free firmware update once developed. Until then, a JB4 mobile adapter or BMS data cable is required for any map and setting changes. 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.
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. A separate JB4 Mobile app purchase is also required.
F Chassis N55 JB4 Applications
BMW 1 Series
• 2012-2013 N55 BMW F20 F21 M135 (JB4_PWG)
• 2014-2015 N55 BMW F20 F21 M135 (JB4_EWG)
BMW 2 Series
• 2014-2015 N55 BMW F22 F23 M235i (JB4_EWG)
• 2016-2017 N55 BMW F87 M2 (JB4_EWG)
BMW 3 Series
• 2012-2013 N55 BMW F30 F31 335i including xDrive, Active Hybrid, xDrive GT (JB4_PWG)
• 2014-2015 N55 BMW F30 F31 335i including xDrive, Active Hybrid, xDrive GT (JB4_EWG)
BMW 4 Series
• 2014-2016 F32 F33 F36 BMW 435i including xDrive and Gran Coupe (JB4_EWG)
BMW 5 Series
• 2011 N55 BMW F10 F11 F07 535i including xDrive, ActiveHybrid 5, xDrive GT (JB4_F10_A)
• 2012-2013 N55 BMW F10 F11 F07 535i/ix, ActiveHybrid 5, and 535i/ix GT (Either JB4_F10_A or JB4_PWG)
• 2014-2016 N55 BMW F10 F11 F07 535i/ix, ActiveHybrid 5, and 535i/ix GT (JB4_EWG)
BMW 6 Series
• 2011 N55 BMW F06 F12 F13 640i including xDrive and Gran Coupe (JB4_F10_A)
• 2012-2013 N55 BMW F06 F12 F13 640i including xDrive and Gran Coupe (Either JB4_PWG for Type B or JB4_F10_A for Type A)
• 2014-2016 N55 BMW F06 F12 F13 640i including xDrive and Gran Coupe (JB4_EWG)
BMW 7 Series
• 2013-2018 N55 BMW F01 F02 740i including xDrive (JB4_EWG)
BMW X Series
• 2011-2013 F25 N55 BMW F25 X3 including xDrive (JB4_PWG)
• 2014-2017 N55 BMW F25 X3 including xDrive (JB4_EWG)
• 2014-2018 N55 BMW F15 X5 F16 X6 including xDrive (JB4_EWG)
• 2014-2018 N55 BMW X4 M40i including xDrive (JB4_EWG)
Questions?
Small items arrive to you in under 1 week
Larger products like full suspension kits must ship freight and can take 1-3 Weeks
Instructions are included for most parts that require any sort of knowledge to install.
Here's what to do if your parts come WITHOUT instructions:
1. Some parts are genuinely common sense on how they get installed
2. If you can't figure it out on your own, YOUTUBE IS YOUR FRIEND! Our founder started this company from learning how to build headlights off a YouTube Video
3. If there are no videos on YouTube, or instructions anywhere on Google then please CALL OR EMAIL US and we will guide you through or get you instructions from the manufacturer
4. Doing installs on your own is always fun, but sometimes, it isn't. Always consider having your parts professionally installed
ALWAYS CONSIDER US. We sold you the parts, let us install them at THE LAB in Connecticut. We offer enclosed and open cross country transportation.
Of course you won't want to spend thousands on transportation to install lug nuts or emblems but if you are spending a LOT of money on parts, you may just want to send the car our way
If the part was NOT installed, we accept returns within 14 days of delivery.
If the part WAS installed (or attempted installation), we cannot accept a return.
All parts come with Manufacturer Warranty! Each manufacturer has different warranties so we suggest reading up on their warranty policy before ordering.
YES! If you come across a competitor with a lower advertised price than us, we will BEAT it by at LEAST 1%. Please contact us with proof of the lower priced product.
NO! We do not give out discounts or do sponsorships. You can get 5% OFF your first order by signing up for text & email notifications. OR just wait until our BLACK FRIDAY Sale that happens once a year.
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Active Hours: 9:00 AM To 5:00 Pm (Mon To Fri)
Phone: (475) 227-5381
Email: sales@legendsautoparts.com
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