[mx97]

Hey guys, been browsing and reading about the speed limiter of the m340i the past 2 days, and of course was gutted to realize that the car I have been eagerly waiting for the past couple months is going to come limited at 130...

I was going to get rid of my Giulia and planned on keeping the m340 for years to come, but this whole 130 thing is leaving a real sour taste in my mouth. I had no plans of flashing the car seeing how much a mess that process is now.

Should I not pick up this car, and build another with the correct tire setup? Or am I just being ridiculous? It's not even about going 131-155mph, its just the fact that something that is going to cost ~$65k would eventually be passed by my BRZ from 6 years ago...doesn't sit right with me... especially seeing as I was blindsided by this fact and even the dealer didn't know about it lol

[psuky1]

I personally would take the car with the 130 cap vs. waiting however many more months to get a new order in…But I also have mine on order with the all seasons knowing I was going to have the 130 cap. Not planning to track the car and I wouldn’t ever push it beyond the that limit on public roads.

[upstate650]

Originally Posted by mx97

Hey guys, been browsing and reading about the speed limiter of the m340i the past 2 days, and of course was gutted to realize that the car I have been eagerly waiting for the past couple months is going to come limited at 130...

I was going to get rid of my Giulia and planned on keeping the m340 for years to come, but this whole 130 thing is leaving a real sour taste in my mouth. I had no plans of flashing the car seeing how much a mess that process is now.

Should I not pick up this car, and build another with the correct tire setup? Or am I just being ridiculous? It's not even about going 131-155mph, its just the fact that something that is going to cost ~$65k would eventually be passed by my BRZ from 6 years ago...doesn't sit right with me... especially seeing as I was blindsided by this fact and even the dealer didn't know about it lol

Very simple to code out the speed limiter. No flash required.

[mondayze]

Originally Posted by upstate650

Very simple to code out the speed limiter. No flash required.

I think the service center can code it for you once you bring it to them with better tires too. I could be wrong though.

[mx97]

Originally Posted by mondayze

I think the service center can code it for you once you bring it to them with better tires too. I could be wrong though.

Salesman said he would get back to me Monday. I hope this is the case, I'll tell them to throw the proper tires on before I pick it up

[mondayze]

Originally Posted by mx97

Salesman said he would get back to me Monday. I hope this is the case, I'll tell them to throw the proper tires on before I pick it up

You can also get bimmercode and code it yourself, and then you can code everything else at the same time. Make sure you keep the old tires if they take them off and sell them. Theyre $300-350 a tire.

[upstate650]

Originally Posted by mondayze

I think the service center can code it for you once you bring it to them with better tires too. I could be wrong though.

I’d be shocked if a dealer would code it off.

[tturedraider]

Originally Posted by upstate650

I’d be shocked if a dealer would code it off.

The odds are pretty much nil. Liability concerns would prevent it.

In almost twenty years on these forums I have never heard of coding out the speed limiter, but there’s a lot that can be done with coding now that wasn’t even thought of in years past. In the past the only way to increase the limiter was with a Dinan tune. Then it appears other tunes, such as the JB, were able to do it.

It has been the case with BMW that ordering high performance, summer tires from the factory is required to get the increased speed limiter since at least the e46. If your dealer didn’t know that then they are STUPID!! Which, I’m sure they are, because most are.

I’m in the process of buying a 2020 xDrive M340i with all season tires and I’m a little bummed about the speed limiter, but the reality is I’m never going to drive the car up to 130 mph, much less over that, so I’m being pragmatic about it. I am swapping the square, all seasons on 791M wheels for a staggered set of 792Ms with performance tires. I was not shopping for xDrive. In fact, I was shopping in the south, specifically excluding xDrive, and planning to travel to get a car. And then this one local just fell into my lap and here I am buying xDrive. At least I know it will have some value here in Chicago.

[monkeyman8]

Originally Posted by psuky1

I personally would take the car with the 130 cap vs. waiting however many more months to get a new order in…But I also have mine on order with the all seasons knowing I was going to have the 130 cap. Not planning to track the car and I wouldn’t ever push it beyond the that limit on public roads.

Same. I went back and forth with this decision but opted for the all-seasons as this will be more of a daily drive/commuter than anything else. I also ordered the spare tire which would not have fit with the higher performance package due to the caliper size. I'll never see 130.

[Bc2005]

Unless it has changed recently, what you want/need is the high performance tire and cooling option if you want to drive faster than 130 mph.

That option includes more than just the high speed rating tires (it also has an oil cooler, larger brake rotors, 19” wheels, speed rated tires, etc.) which is why BMW makes it very hard to bypass the speed limiter. They don’t want to have a warranty claim from you after you fry the engine or can’t stop the car while driving too fast on the track.

[tturedraider]

Originally Posted by Bc2005

Unless it has changed recently, what you want/need is the high performance tire and cooling option if you want to drive faster than 130 mph.

That option includes more than just the high speed rating tires (it also has an oil cooler, larger brake rotors, 19” wheels, speed rated tires, etc.) which is why BMW makes it very hard to bypass the speed limiter. They don’t want to have a warranty claim from you after you fry the engine or can’t stop the car while driving too fast on the track.

The only requirement for the increased speed limiter is performance tires from the factory. The tire and cooling pkg is not required. It never has been. In fact, it’s only even been an option available in recent years.

[upstate650]

Originally Posted by tturedraider

The only requirement for the increased speed limiter is performance tires from the factory. The tire and cooling pkg is not required. It never has been. In fact, it’s only even been an option available in recent years.

Originally Posted by Bc2005

Unless it has changed recently, what you want/need is the high performance tire and cooling option if you want to drive faster than 130 mph.

That option includes more than just the high speed rating tires (it also has an oil cooler, larger brake rotors, 19” wheels, speed rated tires, etc.) which is why BMW makes it very hard to bypass the speed limiter. They don’t want to have a warranty claim from you after you fry the engine or can’t stop the car while driving too fast on the track.

Every tire BMW equips 340’s with are rated for much more than 130.

Bigger brakes and oils coolers have nothing to do with it either. It’s all about marketing, sales, and profit margin.

[mx97]

Originally Posted by upstate650

Every tire BMW equips 340’s with are rated for much more than 130.

Bigger brakes and oils coolers have nothing to do with it either. It’s all about marketing, sales, and profit margin.

This is what was so strange about it all! I'm sure the AS RF tires are at least rated for 149mph. The Pirelli Cinturato AS RF my Giulia came with are rated for 149, and the car isn't limited to 130.


After thinking about it literally all day, I'm still going to go for the build. I'll definitely be remembering this lesson for next time though lol

[TheMaxXHD]

It has to do with the size of the tires. All seasons from the factory for the m340i come with a square 225 setup. Performance tires from the factory are staggered 225 front 255 rear. Likely the speed limiter comes down to the fact that 225 is not enough tire to really push it, especially in the rear.

Should they equip the car with larger tires, yes. Do they, no.

[malibuboats91]

I had to get the all season setup as well back in late 2021 when it was incredibly hard getting well optioned cars. I ordered the wider rear wheels and swapped over to PS4S after driving it home from the dealer and it changed the whole driving experience. Personally I never drive over 130, let alone 100 so the speed limiter isn’t an issue. I wouldn’t worry about it too much if I was you.

[Bc2005]

Upstate650, unless you have some additional tech documents from BMW, you may be confusing actual performance with marketing and corporate engineering decisions.
- the car has enough power, and you may have purchased the Z rated tires needed to drive more than 155 mph, but that is not the issue.
- if you did not order the high performance cooling and tire option, BMW uses H rated tires and sets the ECM to limit the speed to 130 mph. That is a corporate engineering decision.
- I am not aware of any simple coding change (BimmerCode, etc.) that allows you to set the speed limiter to a higher value if you did not order the factory option package. However, I have not fully researched Bimmercode expert mode.

I thinks it’s also important to remember that cars with the 130 mph vs. 155 mph speed limiter have identical acceleration right up to the limit. Unless you plan to track the car and drive over 130 mph, it’s not much of an issue for most drivers.

[tturedraider]

Originally Posted by upstate650

Every tire BMW equips 340’s with are rated for much more than 130.

Bigger brakes and oils coolers have nothing to do with it either. It’s all about marketing, sales, and profit margin.

Originally Posted by mx97

This is what was so strange about it all! I'm sure the AS RF tires are at least rated for 149mph. The Pirelli Cinturato AS RF my Giulia came with are rated for 149, and the car isn't limited to 130.


After thinking about it literally all day, I'm still going to go for the build. I'll definitely be remembering this lesson for next time though lol

Originally Posted by Bc2005

Upstate650, unless you have some additional tech documents from BMW, you may be confusing actual performance with marketing and corporate engineering decisions.
- the car has enough power, and you may have purchased the Z rated tires needed to drive more than 155 mph, but that is not the issue.
- if you did not order the high performance cooling and tire option, BMW uses H rated tires and sets the ECM to limit the speed to 130 mph. That is a corporate engineering decision.
- I am not aware of any simple coding change (BimmerCode, etc.) that allows you to set the speed limiter to a higher value if you did not order the factory option package. However, I have not fully researched Bimmercode expert mode.

I thinks it’s also important to remember that cars with the 130 mph vs. 155 mph speed limiter have identical acceleration right up to the limit. Unless you plan to track the car and drive over 130 mph, it’s not much of an issue for most drivers.

Do you have current technical documentation that shows BMW is using H rated tires on cars with all seasons?

I have documentation that confirms they used H rated tires on E90s. I’m not sure about F30s and I haven’t been able to find any documentation regarding the G20. But, I checked Tire Rack and their OEM all season tires are V rated to 149 mph.

[TheMaxXHD]

You don’t need the performance cooling package to have the speed limiter set at 155mph. Ordering performance tires only will achieve the same effect.

As I said, it is a matter of staggered vs square. BMW sets all seasons to square setups 225 on the M340i at 130mph limiter, performance tires meanwhile are staggered 225 255 with a speed limiter at 155mph.

[tturedraider]

Originally Posted by TheMaxXHD

You don’t need the performance cooling package to have the speed limiter set at 155mph. Ordering performance tires only will achieve the same effect.

As I said, it is a matter of staggered vs square. BMW sets all seasons to square setups 225 on the M340i at 130mph limiter, performance tires meanwhile are staggered 225 255 with a speed limiter at 155mph.

It’s a matter of speed rating. The all season tires are not speed rated for 155. In the past they were H rated to 130. It appears they are now using V rated tires (at least in the U.S. market) rated to 149. The performance tires are (and were) Y rated to 168.

[rmedina]

There's nothing wrong with the limiter. It's for safety reasons. This car is stupid fast.

[Dairdevyld]

I'm curious why people opt out of the Cooling & High Performance Tire Package? I think I see more M340's ordered without it than with it. Is it just one of those add-ons people feel is more of a gimmick than substantive? Is it too much money? Does BMW not explain it well enough? I went for that almost immediately; it was probably the last option I would've removed if I had to. So just curious...

[monkeyman8]

Originally Posted by Dairdevyld

I'm curious why people opt out of the Cooling & High Performance Tire Package? I think I see more M340's ordered without it than with it. Is it just one of those add-ons people feel is more of a gimmick than substantive? Is it too much money? Does BMW not explain it well enough? I went for that almost immediately; it was probably the last option I would've removed if I had to. So just curious...

Most people will never push the car to the limits that would actually require the additional cooling. As for the tires, some of us I gather just aren't into the "high performance" aspect of this vehicle while others are. Very, very few will ever push this car that far. For me this will simply be a daily driver with some kick, also I really wanted the spare (this was important) as we drive long stretches at a time in somewhat remote areas. Not a money issue here, just not practical enough.