SKU: 88647811504

S58 JB4 Tuner for 2020+ BMW X3M/X4M

Sale price$361.35 Regular price$401.50
Save 10%

Pay in installments of $100.38 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

S58 JB4 Tuner for 2020+ BMW X3M/X4MGains are 80whp 100wtq on pump gas and up to 150whp 175tq on higher octane or E85 mixtures. The ultimate tune for your S58 powered vehicle, the JB4 allows you to go from factory stock to full race, and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune including user adjustable 1st and 2nd gear boost limiting, electronic wastegate control, smartphone integration, ethanol fuel

Gains are 80whp/100wtq on pump gas and up to 150whp/175tq on higher octane or E85 mixtures.

The ultimate tune for your S58 powered vehicle, the JB4 allows you to go from factory stock to full race, and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune including user adjustable 1st and 2nd gear boost limiting, electronic wastegate control, smartphone integration, ethanol fuel support, and built in advanced CANbus based diagnostic tools. Installation is completely removable with no splicing or cutting of factory wires.

For the latest performance results, updates, firmware, and map guide be sure to visit N54tech.com.

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 also required.

 



JB4 Features & Benefits

• Gains are 80whp/100wtq on pump gas and up to 150whp/175wtq on higher octane or E85 mixtures.
• 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


S58 JB4 Applications

BMW X3M
• 2020+ S58 X3M
• 
2020+ S58 X3M Competition

BMW X4M
• 2020+ S58 X4M
• 
2020+ S58 X4M Competition

Click here for S58 G8x M3/M4 JB4

 

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

DRAGY TIMES


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: 88647811504

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 13 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
T
Verified Purchase
Tw
Dallas, US
★★★★★ 5
"WORK GREAT"!
Size: 24.01+18.01, Style: 2 piece
They Fit perfectly, easy to put on my Hyundai Elantra. Their Alot nicer than the old ones my last mechanic put on & work Alot better. Good value for the price i Highly recommend them. I'm a CHRISTAIN & Not paid for my review.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
P
Verified Purchase
PapaRatzy
Los Angeles, US
★★★★★ 5
Easy to install no streaks
Size: 24+17.01, Style: 2 piece
No problems installing these wiper blades. They do a very good job of clearing the windshield of water when it’s raining. I have not noticed any squeaks or streaks. Well worth the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
A
Verified Purchase
Alex
Port Orchard, US
★★★★★ 5
Good Price. Solid Product
Size: 26+19+21, Style: 3 piece
I ordered these wipers for a 2011 Honda Crosstour. It’s a pretty rare car and I barely see these on the road, so finding these wipers was great since most brands do offer parts for these cars but they are crazy expensive, what I liked about these wipers was the durability and the efficiency you can notice the material was sturdy and wasn’t going to snap off and the efficiency was great. It cleared the windshield without leaving and strikes or making a sound. I would highly recommend these wipers or buying from this brand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
K
Verified Purchase
Keith
Carnegie, US
★★★★★ 4
Quick delivery, and fits perfect
Size: 22+22, Style: 2 piece
Quick delivery, Fit perfect. Don't get much rain in SO CAL so I can't report on the quality just yet. Seems good for this environment.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
M
Verified Purchase
Mike
Chelsea, US
★★★★★ 5
Good product at a great price
Size: 26+17+12.01, Style: 3 piece
I was looking for some wipers that were just like the ones that come on my 2024 Honda HRV and these came up on the Amazon website so I ordered them and the very next day they were delivered to my house!!!!! WOW and they are just like the ones that came on my HRV. Very easy to install with NO adapters to use or parts to take off. All I had to do was take my old wipers off and put on the NEW ones and the price is great too. Also they come well packaged and a plastic guard is over the rubber for more protection in the shipping so be sure to take that off before install, you’d be surprised how many people would leave it on and think that they don’t work properly. Note: Be sure to clean your windshield before you use your wipers cause road scum or wax from car washes will make you think that they don’t work. I had some problems but once I cleaned my windshield really good there was no streaks at all. Now I don’t know how long they will last cause I just got them, may do another review in the future.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 17, 2025

recommand products