New to forum - got my 2026 MkV M6 Final Edition Delivered - questions!

[lithdoc]

Hello to all,

First of all, wanted to introduce myself. Just got my first Supra (of first foreign brand car for that matter). Here in Dallas dealers markups and mandatory "packs" - including USB cables and diamond care packages are all bundled in addition to dealer markups - the lowest I found was $3000, but that's in addition to all the "options that are part of the VIN." Found one without any unnecessary options in the Midwest, $500 below sticker - shipping cost me a little bit but still saved several thousand.

Have been driving American Cars most of my life - Firebirds, Buick coupes, Grand Marquis (student days).

Then went onto Challengers in 2015 and have had four - three M6 Hellcats, two of which I still own.

Gladly welcomed new member to the family today! She's a beaut!

Few questions:

1. Stock tires vs. Michelin PS4 - I know it comes with Super Sport, but exchange for PS4 would not be very expensive and was a must on my Challengers (they come with stock all-season Pirellis which should be illegal). Does it need any fancy BMW style reprogramming or otherwise? I figured I could sell the current tires for about $800-1000 as they are still new.
2. BimmerCode - I read a lot about - is it something worthy of getting? What options does it unlock - just programs the menu items and enables sport mode at the start, or is there more?
3. Modding for more power - what power enhancing mods can I do without compromising warranty? I read about Femto, but are there cheaper and less invasive mods, such as flashing the ECU to unlock extra power? Does that compromise warranty?
4. Crossbar behind the seats - is it decorative or does it serve a structural purpose? I am 6'4" and would love extra recline - but not at the expense of structural integrity.

Thank you all, and looking forward to my years with Supra! It is gorgeous and timeless design.

Sponsored

 

[lucky phil]

Hello to all,

First of all, wanted to introduce myself. Just got my first Supra (of first foreign brand car for that matter). Here in Dallas dealers markups and mandatory "packs" - including USB cables and diamond care packages are all bundled in addition to dealer markups - the lowest I found was $3000, but that's in addition to all the "options that are part of the VIN." Found one without any unnecessary options in the Midwest, $500 below sticker - shipping cost me a little bit but still saved several thousand.

Have been driving American Cars most of my life - Firebirds, Buick coupes, Grand Marquis (student days).

Then went onto Challengers in 2015 and have had four - three M6 Hellcats, two of which I still own.

Gladly welcomed new member to the family today! She's a beaut!

Few questions:

1. Stock tires vs. Michelin PS4 - I know it comes with Super Sport, but exchange for PS4 would not be very expensive and was a must on my Challengers (they come with stock all-season Pirellis which should be illegal). Does it need any fancy BMW style reprogramming or otherwise? I figured I could sell the current tires for about $800-1000 as they are still new.
2. BimmerCode - I read a lot about - is it something worthy of getting? What options does it unlock - just programs the menu items and enables sport mode at the start, or is there more?
3. Modding for more power - what power enhancing mods can I do without compromising warranty? I read about Femto, but are there cheaper and less invasive mods, such as flashing the ECU to unlock extra power? Does that compromise warranty?
4. Crossbar behind the seats - is it decorative or does it serve a structural purpose? I am 6'4" and would love extra recline - but not at the expense of structural integrity.

Thank you all, and looking forward to my years with Supra! It is gorgeous and timeless design.

Try the "search" function. It's all there.
Phil

 

[oreobbq]

Congrats! You forgot to ask about oil lol.

Yeah upgrade the tires. Is the cross bar functional…who knows. I used to hear a bit of flex before I insulated the touch points so it must be providing a little bit of rigidity.

 

[D3ad_Hand]

Few questions:

1. Stock tires vs. Michelin PS4 - I know it comes with Super Sport, but exchange for PS4 would not be very expensive and was a must on my Challengers (they come with stock all-season Pirellis which should be illegal). Does it need any fancy BMW style reprogramming or otherwise? I figured I could sell the current tires for about $800-1000 as they are still new.
2. BimmerCode - I read a lot about - is it something worthy of getting? What options does it unlock - just programs the menu items and enables sport mode at the start, or is there more?
3. Modding for more power - what power enhancing mods can I do without compromising warranty? I read about Femto, but are there cheaper and less invasive mods, such as flashing the ECU to unlock extra power? Does that compromise warranty?
4. Crossbar behind the seats - is it decorative or does it serve a structural purpose? I am 6'4" and would love extra recline - but not at the expense of structural integrity.

Thank you all, and looking forward to my years with Supra! It is gorgeous and timeless design.

As phil said the search bar does wonders I already made a 101 thread Ill link it.
https://www.supramkv.com/threads/gr-supra-101-routes-to-big-power.17670/

To answer your questions:

1. Ps4s better. no need for coding go up to 305's in the back if you want. or stock size do what you like. no need for coding just input the info in the settings.


2. Yes bimmer code is worth it. It codes a bunch of stuff into the supra that are not there on the infotainment screen or settings. Options that are not there for example turning off the annoying Auto off and many many more options. Example of such options (taken from a bmw forum but same thing of course some options are not there because you got the budget z4):

Head Unit MGU
Remove legal disclaimers
M start up animation in I drive
Video in Motion enable
Radio 50% at start up
Tyre pressure & temperature both displayed
Front DRL check box added in I drive
Body Domain Controller BDC
Start car in adaptive mode
Light / rain sensor insensitive
Turn off passenger mirror tilt in reverse
Rear LEDS on with front DRL's
Boot opening delay to 1 second
No horn when locking car with engine running
Window lifter interuption when opening door - removed
Advanced Crash Module ACSM
Remove seat belt chimes driver and passenger
Change rear view camera to 50km and 50m
Engine Control Unit DME
Air con memory remember last setting
Air con auto settings used in manual mode
Instrument Cluster DKOMBI
Alpina dash layout
Powertailgate Module HKFM
Close tailgate without long press on remote

I added the below in expert mode

Enable Sport + function & Comfort + functions
Expert mode
Body Domain Controller - BDC
3221 PfFesMaster > fes > Change FesSportWorldMode1 to SportExpert (Default should be Non sport expert).
“3221 PfFesMaster” > fes > comfort plus > Comfort Plus

Enable sport + & comfort + options in the I drive menu
Expert mode
Headunit - MGU
3008 > Fes_sport_Expert > Change nicht aktiv to aktiv for sport +
3008 > Fes_Comfort_Plus and change it to aktiv for comfort +

Enable Auto Steering Wheel heat option in I drive
Expert mode
Headunit - MGU
3000 HMI SPEECH > AKT_Auto_Lenkradheizung > aktiv

Enable Auto Steering Wheel heat function
Body Domain Controller - BDC
3142 PfLinLRE > LHZ_ CCM_IKF > aktiv
3450 Others 1 > IKF_ENABLE: ikf_alle_sitze

Enable Rear Camera Zoom (Towbar)
Expert mode
Headunit – MGU
300B Parken- Macro_trailer_coupling > active.

Enable Bowers & Wilkins HI FI & Equaliser
Expert mode
Headunit - MGU
3002 - Audio Broadcast – Audio System then change the parameters from alev3-Ram to alev4-Ram code


3. Nothing. There is nothing you can mod and expect warranty to be there. Maybe a jb4, but not sure since I dont live in the U.S. However here is the ECU situation taken from my thread.

• ECU situation:

As it is stands now 2020 Supras can simply be bench unlocked by anyone basically. If your Supra is 2020 you're fine please continue the thread if not please keep reading. Any ECU produced after June 2020 is a locked ecu it can not be bench unlocked and has to be shipped to Finland for it to be unlocked. As of now, only one company has unlocked the ECU which is Femto (not a full unlock will go into details later).However, some early production 2021 Supras have ECUs that can be bench unlocked, this is because they were produced with ECUs predating June 2020.

• How to check if your ECU is locked:

If you want to check which unlock you need you should attach an OBD2 adapter to your car and connect it to your phone. You can check if your car needs a bench to unlock or a Femto unlock by simply downloading's MHD or BM3 and connecting to the car and checking. It will tell you what unlock you need. there are multiple ways to connect to your car's OBD2 adapter. First is wireless adapters like MHD Univeral Wifi Adaptor or other adapters like kies motorsports and BM3's adapter as well (there are cheaper options). The second is buying an OBD2 adapter to ethernet, and then an ethernet to iPhone adapter. HOWEVER, MAKE SURE IT IS COMPATIBLE WITH YOUR PHONE AND THE MHD OR BM3 APP. SOME WIRELESS ADAPTERS AND ETHERNET ADAPTERS DO NOT WORK MAKE SURE THEY WORK.

IF YOUR ECU IS LOCKED READ THIS:

So now you have 2 routes to choose either a Femto unlock or JB4 a piggyback tune I will explain both.

• JB4:

According to BurgerMotorsports "The JB4 is a programmable computer that attaches between the ECU and vehicle sensors allowing it to adjust your vehicle’s tuning by tapping into areas of the factory flash mapping that are not normally available." Basically a piggyback tune. Of course, it can never mount to a full-on custom tune. However, it is possible to have a custom JB4 map. It will squeeze out more power than the preexisting tunes and run smoother. One of the best people in the business for JB4s is @Jesse DaBears. You can run methanol and upgrade your turbo even with a JB4. However, it will not be the same power figures as the full-on custom tunes of BM3 or MHD. However, it's way cheaper and inexpensive to go this route. You can definitely reach 500whp on a JB4 easily. I will get on to those methods later on.

• Femto Unlock:

As for the Femto unlock do keep in mind that it is a partial unlock, by a partial unlock I mean calibration tuning. "In the context of tuning a car's Electronic Control Unit (DME/ECU), the term "calibration tunes only" refers to the process of modifying or adjusting specific calibration parameters within the ECU to improve the vehicle's performance, fuel efficiency, or drivability. This means that the tuning service being offered focuses on making changes to the ECU's settings, rather than offering a complete custom tune or modifying the car's hardware.

"Calibration tunes generally involve adjusting parameters such as air-fuel ratio, ignition timing, and boost levels to optimize the engine's performance. This may be done by a professional tuner or through the use of an aftermarket software that can access and modify the DME/ECU's settings. " - @a90fresh - https://www.supramkv.com/threads/how-to-do-femto-supra-partial-unlock.16194/page-3

However, you do need to ship your ECU to Finland for a about a week give or take. As of right now, the only company which does a partial unlock on ECUs is Femto there are no other companies that provide this service. However, there are some garages/companies which will ship the ECU for you as a package. For example, buying BM3 or MHD license + shipping off your ECU. I would advise anyone who is shipping their ECU to go through these companies. So that your ECU makes it back in a week or so, and to so that your ECU does not get lost in shipping etc etc. Also they will provide periodic updates. I will tag some of them.

• Full Unlock / EcuTek / Femto:

As of right now EcuTek is not provided on ECUs past June 2020. This is not a problem on Femto's side, but rather EcuTek's side. They need to update their kit to be compatible with ECUs past June 2020. There is a fix to this, but it is expensive, but the best and only option currently. The workaround for the partial unlock is buying another ECU predating June 2020, and cloning it. This means copying everything over from the ECU past June 2020 to the ECU predating June 2020(this is just a simple explanation). That way it is a full unlock and you can have all the fueling mods you want and EcuTek if you prefer it over MHD, BM3, etc. However, even if your ECU is post June 2020 you can still run fueling mods which I will go into details later on. I will link a thread that has the BMW ECU's compatible with the Supra which are pre June 2020.

Threads and useful links on JB4 / Femto / ECU status:
JB4 vs Unlocked Tune: https://www.supramkv.com/threads/jb4-vs-unlocked-tune.15375/#post-237975
How to do Femto Supra partial unlock?: https://www.supramkv.com/threads/how-to-do-femto-supra-partial-unlock.16194/page-3#post-273185
Femto current unlocking status: https://willmy062020plusecugotorussia.com/


4. Take it out install HKS one or another brand but it's not there as a decoration. I'm 5'08 / 5'09 so idk I would let other tall people answer that.

 

[BMWAF]

2. Yes bimmer code is worth it. It codes a bunch of stuff into the supra that are not there on the infotainment screen or settings. Options that are not there for example turning off the annoying Auto off and many many more options. Example of such options (taken from a bmw forum but same thing of course some options are not there because you got the budget z4):

Head Unit MGU
Remove legal disclaimers
M start up animation in I drive
Video in Motion enable
Radio 50% at start up
Tyre pressure & temperature both displayed
Front DRL check box added in I drive
Body Domain Controller BDC
Start car in adaptive mode
Light / rain sensor insensitive
Turn off passenger mirror tilt in reverse
Rear LEDS on with front DRL's
Boot opening delay to 1 second
No horn when locking car with engine running
Window lifter interuption when opening door - removed
Advanced Crash Module ACSM
Remove seat belt chimes driver and passenger
Change rear view camera to 50km and 50m
Engine Control Unit DME
Air con memory remember last setting
Air con auto settings used in manual mode
Instrument Cluster DKOMBI
Alpina dash layout
Powertailgate Module HKFM
Close tailgate without long press on remote

I added the below in expert mode

Enable Sport + function & Comfort + functions
Expert mode
Body Domain Controller - BDC
3221 PfFesMaster > fes > Change FesSportWorldMode1 to SportExpert (Default should be Non sport expert).
“3221 PfFesMaster” > fes > comfort plus > Comfort Plus

Enable sport + & comfort + options in the I drive menu
Expert mode
Headunit - MGU
3008 > Fes_sport_Expert > Change nicht aktiv to aktiv for sport +
3008 > Fes_Comfort_Plus and change it to aktiv for comfort +

Enable Auto Steering Wheel heat option in I drive
Expert mode
Headunit - MGU
3000 HMI SPEECH > AKT_Auto_Lenkradheizung > aktiv

Enable Auto Steering Wheel heat function
Body Domain Controller - BDC
3142 PfLinLRE > LHZ_ CCM_IKF > aktiv
3450 Others 1 > IKF_ENABLE: ikf_alle_sitze

Enable Rear Camera Zoom (Towbar)
Expert mode
Headunit – MGU
300B Parken- Macro_trailer_coupling > active.

Enable Bowers & Wilkins HI FI & Equaliser
Expert mode
Headunit - MGU
3002 - Audio Broadcast – Audio System then change the parameters from alev3-Ram to alev4-Ram code

Umm.. Some of these do absolutely nothing on our cars. Did you just copy and paste this from a BMW forum?

 

[Rensuhlo]

Did you just copy and paste this from a BMW forum?

I know there are some really smart Aussies on this forum, and I'm sorry you're not one of them.

 

[BMWAF]

I know there are some really smart Aussies on this forum, and I'm sorry you're not one of them.

He literally gave the guy a bum steer. If he codes some of this shit he might actually fuck up his car.

 

[noogie]

You’re not getting 800 for used tires. Doesn’t matter how many miles are on it. Maybe 600 at best.

The stock SupetSports aren’t the same off the shelf ones. They’re made to BMW/Toyota specification as indicated by the star on the sidewall.

I don’t believe it’s a noticeable improvement with the 4s. They’re the same class of summer tires. You need to look at extreme summer performance if you want a noticeable difference eg. RE71RS.

 

[_Sp1ral0ut]

Welcome to the party, new jack.

Here is a few friendly things to remember:

1) In two weeks
2) Narwhal Oil 2w14
3) But it's crooked...
4) Just do a chargeback

 

[MisterSkiz]

OEM Tires suck - are you planning on driving this in the rain? If so the PS4S are great. No rain? You might want to go to Sport Cups or Bridgestone RE71RS

You can probably do an intake/exhaust only with keeping your warranty. Any power this car makes comes from freeing up the catalytic converter and increasing boost. The Boost is logged so anything outside of spec will be noticed. Don't mess with any JB4 piggyback or tuning if you want to play by the rules.

Axles are a weak point on this car, some people have broken them under stock power while having fun with digs.

As a car guy you will have fun when the warranty runs out - these things have tons of aftermarket potential - the limit is your wallet.

 

[swrdply400mrelay]

For me the most helpful Bimmer Code adjustments were keeping the dash brighter, and in reverse the passenger mirror not tilting so low.

IIRC, people who changed the rear strut bar to a thinner one like HKS, were able to move the seat further a couple more inches.

 

[Eastwood]

I have an HKS rear trunk bar. The seat doesn't move further back but it does recline further back but not by a whole lot.

 

[itzTang]

I have an HKS rear trunk bar. The seat doesn't move further back but it does recline further back but not by a whole lot.

yea reclines back couple inches. size matters!

 

[SavagePassenger]

You’re not getting 800 for used tires. Doesn’t matter how many miles are on it. Maybe 600 at best.

The stock SupetSports aren’t the same off the shelf ones. They’re made to BMW/Toyota specification as indicated by the star on the sidewall.

I don’t believe it’s a noticeable improvement with the 4s. They’re the same class of summer tires. You need to look at extreme summer performance if you want a noticeable difference eg. RE71RS.

Agreed, there's no reason to waste money swapping brand new PSS out for PS4s. Getting a different class of tire makes more sense if you want to have better dry performance.

 

[nanaisu]

Get a new set of tires whenever you feel like it - just make sure when you do, you get a wider set of PS4S, ECS2, or some other high performance sports tire. If you don't drive in the rain, cup2s are a good choice as others have said.

Favorite Bimmercode functionality by far has been disabling the lock chirp and having the headlights flash when locked (great for dogs). Second to that was proximity locking/unlocking. Last was automatic seat warmers at $userDefined temperature.

I don't recall how many of these codings actually come in the car... it's been so long, lol. However, if you do look into coding, get BimmerUtility or Protool. Can do lots more wkth those guys than Bimmercode.

Also, get the MHD Universal WiFi adapter - it offers the most flexibility in terms of wireless programming. If you're a wireless hater, look into an eNet cable & adapters. eNet is pretty much ODB2 to Ethernet. Sometimes to USB-C.

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