[Dinan_Engineering]

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Part Number(s): D440-0200 & D440-0200-W

Applications:

• 2023-2025 BMW G87 M2
• 2021-2025 BMW G80 M3
• 2021-2025 BMW G82/G83 M4
• 2020-2024 BMW F97 X3M
• 2020-2025 BMW F98 X4M

Product Page(s) / Pricing:

• Dinan S58 PCU (Limited Warranty) - Click HERE
• Dinan+ S58 PCU (Factory Matching Warranty) - Click HERE

Release Date: Available Now!

Description: Developed wholly from the ground up, the Dinan Power Control Unit (PCU) is an evolutionary step in Dinan in-line tuning modules based off over a decade of lessons learned in the category. At its core the PCU is similar to its precursors and installs in between select sensors and the ECU, adjusting these signals in order to achieve increased performance the stock programming is unable to approach. However, what sets the PCU apart is its integration into more than just the fundamental boost sensors but also additional connections -- inclusive of OBDII. The result is a more capable system that can do so much more than just increase power. Live monitoring of vehicle health via logging, customizable gauges, and code reading/clearing, among others, are now possible ensuring a seamless tuning experience even a novice can be comfortable with.

The Dinan PCU is controlled by a free Bluetooth app, available for both iOS and Android, and is home to all the potent features the device offers. Equipped with 5 different pre-set performance levels, in addition to stock, you can choose to select your desired output and enjoy more power for a true install and forget experience, or you can opt to engage in the more advanced features at your fingertips. Boost by gear customization, as an example, allows you to limit power delivery as you see fit in lower gears ensuring optimum traction and a perfect launch. Where the PCU shines however is in data acquisition and monitoring that gives insight into the vehicles overall health and makes certain your tuned vehicle is always running at peak potential.

Safety and reliability have been cornerstones of the Dinan brand for generations and not only does the Dinan PCU not hinder any factory safeguards or emissions controls but incorporates its own safeties as well. Going one step beyond our own internal protections, the PCU also grants the end user the ability to monitor up to 20 different engine parameters in real time via customizable in-app gauges for verification of worry-free operation. Those same parameters can also be logged/viewed in app (or exported to CSV) for further scrutiny if desired.

All told, the Dinan PCU delivers more power and more features with improved reliability and drivability than ever offered before. Performance without sacrifice is alive and well!

Features/Benefits:

• More Power: Max gains between +61-67 HP and +57-73 lb-ft TRQ (Wheel); +70-76 HP and +61-77 lb-ft TRQ (Crank), depending on application
• Bluetooth connectivity and control via free iOS or Android PCU apps
• Multiple power levels, plus stock, to choose from
• Designed for peak performance utilizing pump gas fueling; 91 octane tuning (levels 1-3), and 93 octane tuning (Levels 4-5)
• Improves power and torque across the entire RPM range
• Customizable in-app gauges
• Real-time logging up to 20 (16 max at one time) parameters courtesy of CAN/OBDII integration and the supplied PCU app
• Logs can be viewed directly in the PCU app or exported/emailed as a CSV file for more detailed scrutiny
• Boost by gear user customization to reduce unwanted wheel spin in lower gears
• Read and clear fault codes as well as check emissions readiness
• Retains all factory safeguards and works flawlessly with onboard emissions controls
• Unaffected by factory updates
• Plug-and-play installation
• Unplug and go back to stock at any time or transfer the unit (Not VIN locked)
• Designed, developed and manufactured entirely in the USA

*SKU Variations / Warranty: The Dinan S58 PCU is available with a standard 2-YR product only warranty (Dinan S58 PCU – D440-0200) or a factory matching 4-YR/50k mile warranty (Dinan+ S58 PCU – D440-0200-W) that covers both consequential damages as well as labor reimbursement. Functionally, the units are identical but carry different warranty terms. In the case of the factory matching warranty Dinan+ PCU, the warranty ONLY applies to the first VIN the unit is installed on. Successive VIN’s will not be granted warranty coverage from Dinan.











Install Video:

[SwankPeRFection]

Weak. The power figures is everything someone needs to see to realize this way of piggyback tuning is weaker and only works within an “allowable correction window” of the stock ECU map. This is why piggybacks will NEVER be as good and as complete a solution as a flash will. I wish these community vendors would spend more of their development costs on finding a States side unlock solution rather than putting out all these useless trinket boxes and passing them on as feasible products. Sorry but 👎.

[mike@x-ph.com]

More options is always good, i do wish the warranty one cost less (50% less), it would be a best-seller

[Dinan_Engineering]

Originally Posted by SwankPeRFection

Weak. The power figures is everything someone needs to see to realize this way of piggyback tuning is weaker and only works within an “allowable correction window” of the stock ECU map. This is why piggybacks will NEVER be as good and as complete a solution as a flash will. I wish these community vendors would spend more of their development costs on finding a States side unlock solution rather than putting out all these useless trinket boxes and passing them on as feasible products. Sorry but 👎.

I don't think you will ever get an argument from anyone claiming a piggyback is superior to a flash (at least a properly done flash at least). Certainly won't from me. This offering is simply another avenue for folks that want a bit more should they be concerned with warranty or the hassle of the current flashing process. That said, our RE team has been working on a stateside unlock for years and continues to do so today. Its a completely different team then the software/embedded team that works on projects like this one. Pursuing alternative paths, whether some customer segments appreciate them or not, simply allows more complete market coverage.

Originally Posted by mike@x-ph.com

More options is always good, i do wish the warranty one cost less (50% less), it would be a best-seller

Unfortunately that price point is not practical with the factory matching warranty. Keep in mind covering labor for a dealership just to pull a car in and clear a code and nothing else is a $2-300 expenditure. Let alone actually replacing something.

[AhsanU]

I'm guessing that boost levels/power in general is less on the base model G8X vs the Competition models?

[Dinan_Engineering]

Originally Posted by AhsanU

I'm guessing that boost levels/power in general is less on the base model G8X vs the Competition models?

A bit. Non-Comp M3/M4 would be very similar to the M2 chart shared in the OP.

[G80M3Daily]

Any e85 support with this?

[Dinan_Engineering]

Originally Posted by G80M3Daily

Any e85 support with this?

Not at this time. Being investigated for future expansion but realize it would ONLY apply to the base PCU and not the Dinan+ PCU with factory matching warranty.

[SwankPeRFection]

Originally Posted by AhsanU

I'm guessing that boost levels/power in general is less on the base model G8X vs the Competition models?

One thing to keep in mind why this is the case is not because of hardware or software limitations, but one of “base calibration” on the respective car. Remember that there is only so much headroom in the stock calibrations for adjustment without tripping “out of spec” codes, so with a slower calibration starting point from the factory, your net output gains also top out lower. This is why piggybacks are lacking. With full calibration access on the ECU, the limits are the same across the board no matter your base starting point and which car you bough that has an S58 in it… just wanted to help clarify that in case anyone ever wondered why that is and thought maybe it’s due to the actual car in question. The reason is the starting base calibration/tune from BMW.

Oh and anyone with a pre 2025 M2 that wants more power (20HP gain) should just run the 2025 M2 BMW factory calibration. It’s flashable without an unlock on that car. Couple that with CSL coding and you’ll have a nice OEM+ response on your hands out of it for a couple of hundred bucks.

[mike@x-ph.com]

Originally Posted by SwankPeRFection

One thing to keep in mind why this is the case is not because of hardware or software limitations, but one of “base calibration” on the respective car. Remember that there is only so much headroom in the stock calibrations for adjustment without tripping “out of spec” codes, so with a slower calibration starting point from the factory, your net output gains also top out lower. This is why piggybacks are lacking. With full calibration access on the ECU, the limits are the same across the board no matter your base starting point and which car you bough that has an S58 in it… just wanted to help clarify that in case anyone ever wondered why that is and thought maybe it’s due to the actual car in question. The reason is the starting base calibration/tune from BMW.

Oh and anyone with a pre 2025 M2 that wants more power (20HP gain) should just run the 2025 M2 BMW factory calibration. It’s flashable without an unlock on that car. Couple that with CSL coding and you’ll have a nice OEM+ response on your hands out of it for a couple of hundred bucks.

I dont think anyone can argue that a full flash tune done right is better than a piggyback. I will pick the flash tune every time if both options are available.

Piggybacks are for customers that dont want to send their DME overseas. In this case, it makes little sense to compare this product to a flash tune (which is not an option for the target audience) and more sense to compare it to other piggybacks on the market.

[BigRedG80]

Just to confirm, will the Dinan S58 PCU work with the G80 M3 manual? What are the HP and torque increases for the manual M3?

[Dinan_Engineering]

Originally Posted by BigRedG80

Just to confirm, will the Dinan S58 PCU work with the G80 M3 manual? What are the HP and torque increases for the manual M3?

Yes it works on the manual as well. A MT G80 would effectively be the same chart as the G87 chart shown above. Delta's across the board regardless of platform are all going to be in ~60-70HP/TRQ range. Final numbers will differ simply based of of varying starting points.

[Ilma]

Curious how much additional boost this adds over stock?

3-4 psi more?

[Venetian M3]

There seems to be a data logging aspect provided with the PCU, but will Dinan review said data logs from buyers and provide guidance on which map to use or parameters to adjust like BMS does with their JB4?

[shaunee]

Interesting proposition for those that don't want to unlock, but want a bit more than a "normal" tuning box (like logging and DTC clearing in one unit) and are not interested in JB4 capability. I suspect this is probably more appealing to those in the EU, purely because the US has freer access to ethanol so JB4 is probably the "go to" option.

As said above, more options is never a bad thing. At the end of the day the choice is yours as a consumer.

From my experience I have found tuning boxes work very well on the S58 platform (one of the very few platforms I would say such a thing), and for those owners that don't want to unlock, a tuning box is certainly a viable and worthwhile option for additional performance.

[itr_jozay]

worth it, just for the warranty aspect alone. not everyone wants to make a 1000whp

[6SPDG82]

I’m curious as to how the warranty works? Does Dinan deal directly with the supporting dealer.

[Dinan_Engineering]

Originally Posted by Ilma

Curious how much additional boost this adds over stock?

3-4 psi more?

~6 PSI at peak more on level 5.

Originally Posted by Venetian M3

There seems to be a data logging aspect provided with the PCU, but will Dinan review said data logs from buyers and provide guidance on which map to use or parameters to adjust like BMS does with their JB4?

While there are obvious similarities they are different products.

The PCU is a "canned tune" and there is no real customization or parameters to adjust (outside of the boost by gear which is arguably kind of customization) so there is no need to check logs to verify proper running. You run the appropriate octane for the level chosen and the PCU should just be plug and play with the logging aspect being a tool for trouble shooting should something come up down the line or with a new hardware modification or what have you. That said, if there is an issue upon install and the car does not run right or causes a CEL, etc. the support team will likely request some logs to assist in determining what may be at play so the issue can be resolved.

Originally Posted by 6SPDG82

I’m curious as to how the warranty works? Does Dinan deal directly with the supporting dealer.

For Dinan+ we work with the supporting authorized dealer. Basically if a failure or issue occurs you take it to a partner shop and we work with them to resolve. Thats the real lightweight take at least. Full warranty blurb can be found HERE and if you have additional questions feel free to reach out to the support/warranty team at 1-800-341-5480 and they can answer any questions.

[ds316inya]

If I’m reading this right, for 1995.00 for full warranty, you are plugging in 60 more hp? Seems like a good deal to me? I’m not big into flash tunes. Too many tuners try using the “bad gas” excuse for my liking.

[mike@x-ph.com]

Originally Posted by ds316inya

If I’m reading this right, for 1995.00 for full warranty, you are plugging in 60 more hp? Seems like a good deal to me? I’m not big into flash tunes. Too many tuners try using the “bad gas” excuse for my liking.

you are getting the power either way ,its the same tune

$599 no warranty

$1999 with warranty

its a question on whether you want the extra peace of mind.

[nightfire]

Could you share what a 2025 M2 would gain on 91 octane? We only get low octane here in Arizona.

[2024M3CS]

Great to see Dinan! Would love to see this grouped into your performance packages...