SKU: 67236079825

N54 JB4 BMW Performance Tuner

Sale price$238.77 Regular price$265.30
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

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Description

N54 JB4 BMW Performance TunerN54 JB4 BMW Performance Tuner How about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It's everything you need to take your N54 powered vehicle from mild to wild. In addition to several

 

N54 JB4 BMW Performance Tuner

How about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It's everything you need to take your N54 powered vehicle from mild to wild.

In addition to several performance maps which can be selected "on the fly" right from the driver's seat the JB4 includes a 100% stock bypass map, a valet mode, ethanol fuel (E85) support, progressive water/methanol injection support, racing fuel map, an auto-tuning map that adjusts the JB4 mapping to your current climate, octane, vehicle condition, and modifications continuously, and for those interested in an rpm by rpm user adjustable map. Other features include optional in-dash gauges for boost and other engine parameters, a programmable shift light, on the fly adjustable torque limiting to aid with launches at the track, an optional 2STEP rev limiter & no lift shifting for manual transmission cars, an optional speed delimiter, 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. As you decide to modify your car further the JB4 is set up to grow with your vehicle. Whether you're racing a 100% OEM car on pump gas or a 700whp single turbo drag queen, the JB4 has the perfect mix of performance, features, flexibility, and support to ensure your car performs to the best of its potential! 

 

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.

Note: This item is not CARB (California Air Resource Board) exempt and is not legal for sale or use in the state of California.

Click here for the latest N54 JB4 firmware, map guide, and details.

N54 JB4 Features & Benefits

• N54 Power gains of up to 100hp and 100tq to the wheels on a stock vehicle
• Improves 0-60 and quarter mile times.
• Includes multiple tuning maps for different fuel types.
• Quick plug and play installation.
• Supports E85 ethanol blends.
• Reads and deletes fault codes.
• Displays and logs up to 40 engine parameters.
• Boost by gear control for improved traction.
• Controls exhaust flap operation on supported vehicles.
• Compatible with the JB4 Mobile app.
• Offers better performance and safety than basic chip tunes.
• Full CANbus integration.
• Runs as smoothly as stock.
• Compatible with all driving modes.
• No impact on fuel economy during normal driving.
• Requires 91 octane or better for performance gains.
• Not VIN locked and fully removable.
• Includes billet aluminum enclosure.
• Designed and assembled in the USA.
• 5-year warranty.

Vehicle Fitment

BMW 1 Series

• 2008-2010 E82 BMW 135i Coupe
• 2008-2010 E88 BMW 135i Convertible
• 2011 E82 BMW 1M

BMW 3 Series

• 2006-2010 E90 BMW 335i Sedan including xDrive
• 2006-2010 E91 BMW 335i Touring including xDrive
• 2006-2010 E92 BMW 335i Coupe including xDrive
• 2007-2010 E93 BMW 335i Convertible
• 2011-2013 E92 BMW 335is

BMW 5 Series

• 2008-2010 E60 BMW 535i Sedan including xDrive
• 2008-2010 E61 BMW 535i Touring including xDrive

BMW X Series

• 2008-2010 E71 BMW X6 xDrive35i

BMW Z Series

• 2009-2016 E89 BMW Z4 sDrive35i and Z4 sDrive35is 

 

What is a JB4?
The JB4 is a plug and 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 be quickly 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.

 

Is the JB4 a real tune?
Yes the JB4 is a real tune. By tapping into specific sensors and CANbus for real time vehicle data the JB4 is able to alter your boost, timing, AFR, and/or fuel trims, to a similar degree an ECU reflash would, but without the vehicle ever knowing its been tuned. The result is safe, smooth, and significant power and torque gains while retaining your factory safety systems and without having to unlock/flag your ECU.





DYNO RESULTS

Stock, JB4 on a completely stock automatic 135i, on 91 octane


JB4 on an automatic 335i with Exhaust and BMS intake, on 93 octane


JB4, Exhaust, BMS intake, BMS Flash, on 50% E85 fuel

 

JB4, RB Hybrid Turbo Upgrade, Exhaust, BMS intake, BMS Flash, BMS Methanol Injection, Larger Intercooler, on 50% E85 fuel

JB4 Optional Phone Software





N54 JB4 Install Video


JB4 135i 335i Steering Wheel Controls Demo Video


JB4 Optional In Dash Boost Gauge/Shift Light Demo


JB4 Optional Startup Gauge Sweep

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: 67236079825

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4.8 ★★★★★
Based on 21 reviews
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Verified Purchase
Brennan White
Boise, US
★★★★★ 5
Good quality, great for the beach
This is great for ocean and beach fetch! The spikes keep the sand and saltwater from getting in my pups mouth and upsetting her stomach. It also floats well and doesnt fill with water. I have had this for about a month now and in surprisingly good shape considering how obsessed with it my dog is. Not gonna lie, I avoid squeakers since my dog is an absolute menace with them but i assumed the squeaker would break almost immediately, however it is still going strong much to my annoyance🤣
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
P
Verified Purchase
Porchdancer
Phoenix, US
★★★★★ 5
Dog loves it!
Color: Green
Love it ! My pup has played for hours Very Strong and durable so far
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
K
Verified Purchase
Kindle Customer
Dallas, US
★★★★★ 5
Sturdy aggressive chew toy.
Color: Green
Sturdy aggressive chewing dog toy. My 8 year old Rott loved it. Non-stop chewing for 1st day. Usually only buy her Kong toys, and based on reviews decided to try this one. Great product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
M
Verified Purchase
Mel-j
Los Angeles, US
★★★★★ 1
Not really indestructible if it’s plastic
Color: Green, Color: Green
We received this toy yesterday evening and in about 10 mins of giving it to my dog(Labrador) He was able to bite into the plastic parts. I had to take it away from him. So this product is not for aggressive chewers. In fact any dog small or big can bite into the plastic parts. Now when my dog plays with toys he focuses more on the ends of the toy if he deems it to be a chew toy. So he hasn’t gone to the squeaky part yet as I had to take it away from him.
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Reviewed in the United States on May 12, 2026
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Verified Purchase
AQ
Charlottesville, US
★★★★★ 4
Dearly departed
Color: Green, Color: Green
This toy lasted two sessions. Two. Sessions. I don't really fault the toy. I fault the dipstick in the donut suit. Our dog did love this toy. He did look extremely cute carrying a caterpillar around. We did worry about property damage when he would joyfully toss the toy. I find the claim of "indestructible" to be exaggerated. We had some very tense minutes when we couldn't find the caterpillar's head. We kept looking at dog ingress points and dog eggress points with more and more worry. He did NOT swallow the head, it had rolled under a piece of furniture. He is blissfully unaware of how lucky he is. If he was half his size, this would have been a marvelous toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026

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