JB4 Map 6 For 2019-Present BMW X4M
JB4 Map 6 For 2019-Present BMW X4M
JB4 Map 6 For 2019-Present BMW X4M
JB4 Map 6 For 2019-Present BMW X4M

JB4 Map 6 For 2019-Present BMW X4M | E30 Fuel

$500.00

S58 | Single Map For E30 Fuel

A Transmission Tune Is Required To Utilize Our Customized Tuning Services

In the age of FEMTO, enthusiasts need an affordable, accessible and reliable way to add power to their BMW without sending their DME overseas for an unlock.

By simply adding a JB4 and running an off-the-shelf map, you will absolutely notice a small, likely inconsistent power bump. For a consistent, flash-like experience, a skilled professional really needs to custom dial the JB4 in based on your specific vehicle, modifications and fuel.

JB4 originally started with BMW, and today it could be used on several other makes and models. But the deepest features and most refined tuning control remain on BMW, where it’s almost like a mini standalone ECU. Especially with the latest firmware updates, there is a lot that can be done to dial in smooth, consistent power. Many people with JB4 do not report having terrific results. That is because they are an incredibly powerful tool when dialed in by someone with skill and experience, vs simply using as a plug and play solution.

Let our incredible team take your JB4 tuned BMW to the next level and achieve the results you were hoping for.

Post Purchase Information

Upon purchasing our custom tuning solutions, a team member will contact you via email with instructions within 1 business day from the time of purchase. Please make sure to provide a valid email during checkout, as this is the primary method of contact for these services. If you have not received an email from us within 1 business day or less, please check your spam folder.

Please note: custom tuning services are not covered under the NXTGEN product warranty and are used solely at your own risk. For more information, please see our terms of service.

Expected Power Gains

  • Up to 630 WHP on a E30 vehicle with full boltons

  • Up to 595 WHP on a 93 vehicle with full boltons

  • Up to 590 WHP on a E30 vehicle that is mostly stock

  • Up to 550 WHP on a 93 vehicle that is mostly stock

S58 | Single Map For E30 Fuel

A Transmission Tune Is Required To Utilize Our Customized Tuning Services

In the age of FEMTO, enthusiasts need an affordable, accessible and reliable way to add power to their BMW without sending their DME overseas for an unlock.

By simply adding a JB4 and running an off-the-shelf map, you will absolutely notice a small, likely inconsistent power bump. For a consistent, flash-like experience, a skilled professional really needs to custom dial the JB4 in based on your specific vehicle, modifications and fuel.

JB4 originally started with BMW, and today it could be used on several other makes and models. But the deepest features and most refined tuning control remain on BMW, where it’s almost like a mini standalone ECU. Especially with the latest firmware updates, there is a lot that can be done to dial in smooth, consistent power. Many people with JB4 do not report having terrific results. That is because they are an incredibly powerful tool when dialed in by someone with skill and experience, vs simply using as a plug and play solution.

Let our incredible team take your JB4 tuned BMW to the next level and achieve the results you were hoping for.

Post Purchase Information

Upon purchasing our custom tuning solutions, a team member will contact you via email with instructions within 1 business day from the time of purchase. Please make sure to provide a valid email during checkout, as this is the primary method of contact for these services. If you have not received an email from us within 1 business day or less, please check your spam folder.

Please note: custom tuning services are not covered under the NXTGEN product warranty and are used solely at your own risk. For more information, please see our terms of service.

Expected Power Gains

  • Up to 630 WHP on a E30 vehicle with full boltons

  • Up to 595 WHP on a 93 vehicle with full boltons

  • Up to 590 WHP on a E30 vehicle that is mostly stock

  • Up to 550 WHP on a 93 vehicle that is mostly stock

Benefits of JB4 Map 6 Tuning:

1. Full Custom Control by RPM

  • We can control boost, fuel bias, and duty bias at each 500 RPM interval

  • Enables precision tuning for your exact fuel, mods, IAT behavior, etc.

  • Can shape your powerband to match your turbo’s efficiency curve or torque limits

2. Built-in Safety Layers Stay Active

  • Still uses factory DME knock correction, throttle intervention, fuel trims, etc.

  • You can’t blow the car up with just bad boost targets — the DME will still protect it (to a point)

  • Boost failsafe acts as an upper safety net

3. Perfect for E-Blends or Custom Fuels

  • 93, E30, E40, E50, race gas — you can fine-tune the map for different fuels

  • Adjust fuel algorithms and boost pressure to extract more timing safely

  • Lets you safely run stronger and more consistent than generic maps without flashing the ECU

4. Adapts with Hardware

  • If you add a downpipe, intake, port injection or intercooler — we can update the map 6 to fine tune

  • Unlike Maps 1–2, you're not locked into a predetermined set of assumptions or algorithms

What Driving a BMW with a Well-Dialed NXTGEN Map 6 Feels Like:

1. Stronger Low-End Without the Lag

  • Map 6 can boost 2–3 psi earlier than OTS maps with the right duty bias settings

  • You feel the car move instantly at 2000–2500 RPM with no lag or delay

  • Perfect for daily city driving, stoplight jumps, and early pulls

2. Midrange Power (3000–5000 RPM)

  • Boost hits hard, torque is immediate

  • This is where a well tuned Map 6 starts to feel way stronger than Map 2 or 3

3. Cleaner Throttle & Less DME Intervention

  • You don’t get that “blip” of closure or hesitation when the DME freaks out

  • JB4 is tuned to stay within torque limits, so throttle stays open

  • Results in cleaner pulls, even in multi-gear WOT

4. More Consistent Timing (Especially on E30–E40)

  • Custom boost taper up top helps keep ignition advance stable

  • Less knock = smoother, safer power = more usable HP

5. Better Multi-Gear Pulls

  • Off-the-shelf maps can feel jumpy or throttle-y when going 2nd–3rd–4th

  • A dialed Map 6 is linear and composed, especially with xDrive or hybrids

A NXTGEN custom map 6 is smoother, stronger, more stable and consistent versus off the shelf maps, for a more flash tune-like feeling.

Reviews

★★★★★

There it is…

The S58 is always talked about as such a powerhouse, but after my break-in service I was honestly a little underwhelmed. I wasn’t ready to FEMTO a new car, so after a bunch of reading, I went with the JB4 over other piggybacks. The car was smooth and had more pep, but I was still hoping for a little more. I started seeing that people with the best power and times had map 6 tunes. So i looked further into it, but didn’t have the knowledge to mess with it myself. I was looking for a place, but it seems like a lot of these map 6 tunes are done by individuals. I was hoping to find something a little more professional and eventually found NXTGEN. I am glad I did, as the service and the results are top notch. It’s a different car now and exactly what I was hoping for on E30.

-Marco

★★★★★

Wow

I was running both map 3 and map 5 with E30 before having NXTGEN Automotive make me a map 6. I found map 3 was the most powerful and I had my best times. Map 5 was better for daily driving on the street, as it was smoother and more torquey. The car is smooth, powerful and it takes the best of map 3 and 5 and combines them, then ups it a notch. They strongly recommended a transmission tune, which I did and the car is insane now.

-Ryan

★★★★★

Noticeable improvement

The JB4 definitely woke the car up and this really woke the JB4 up. Thank you guys for the great service!

-Geoff

★★★★★

Great Experience

I had a great experience working with the NXTGEN team. After purchasing the map 6, they promptly reached out and asked about my vehicle. They then sent a detailed and professional PDF explaining the process and what needed to be done. I heeded the advice about adjusting the spark gap and having a transmission tune before the JB4 tune. Then I adjusted the JB4 and did some logging as instructed. After I sent in the logs a few times for some adjustments, it is a different car. This was some of the best money I spent on my vehicle yet, it is wicked fun now.

-Larry

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