[sdamike]

Hey everyone, Im looking at some used X3 M40i's and I am new to these.

What are the differences between say a 2019 X3 M40i and a 2020 X3 M40i?

I thought they were all the same HP/TQ but on finding a post on here someone had said a 2018 X3 M40i with a stage 1 tune is basically at where a stock 2020 M40i is at stock. Is that true?

Also it looks like the cluster changed between the years too, not sure if its technically any better? Anything else change for the better or worse?

These seem to be pretty reliable even well above stock power levels no matter what the year from what I can tell. That is awesome to hear and one of the main reasons I am seriously looking at these. If I'm wrong on that please let me know lol

I'm shopping around for one of these (or a X3 M if the price is right) and want to make the best decision possible without breaking the bank. I do care about performance and would probably throw some goodies at it either way (I generally cant help myself there), and just want to make the best decision possible in my budget.

[kini62]

AFAIK the main, biggest difference is the 2020 and up B58 uses a 6 exhaust port head and has a higher rated HP/TQ.

Not sure about anything else.

[Gr8ZongB58]

Originally Posted by kini62

AFAIK the main, biggest difference is the 2020 and up B58 uses a 6 exhaust port head and has a higher rated HP/TQ.

Not sure about anything else.

Not sure about anything else.[/QUOTE]

Incorrect.

B58B30C has the 2 port exhaust manifolds.

The x3 m40i uses the B58B0M0 for gen 1(2018-2019) and B58B30O1 for gen 2(2020+). All 6 port exhaust manifolds.

2020+ uses higher flowing hpfp and has a few intake manifold and valve cover differences as far as the outside of the engine goes.

[Jolbex]

True, but the date is important. Oct. 2019 is 2020....

[Gr8ZongB58]

Originally Posted by Jolbex

True, but the date is important. Oct. 2019 is 2020....

Yes.

One quick look at the intake manifold and/or hpfp and you'll know.

[sdamike]

Originally Posted by Gr8ZongB58

Yes.

One quick look at the intake manifold and/or hpfp and you'll know.

Hmm, I'm interested to see which intake manifold I should be looking for, The M40i I'm debating is a 2019, so it's possible it could have the higher HP rating?
Thats the main difference Im concerned about TBH. Also what is HPFP?

[sbt007]

Either M-sport steering wheel or iDrive 7 was new in MY2020 I think - trying to recall.
Most likely the mSport steering wheel came in midway in '19 (https://x3.xbimmers.com/forums/showthread.php?t=1570485)
Live cockpit pro in '20

[sbt007]

Honestly MY20 is the safest bet.

[Alias1431]

2019 will still have the burbles and pops if you're into that kind of thing. Only in select, higher modes.

This might help. Almost reads like marketing material, but good info. Realistically, they're about the same stock, but the TU will have more headroom to tune thanks to the higher pressure fuel pump.

[Gr8ZongB58]

Originally Posted by sdamike

Hmm, I'm interested to see which intake manifold I should be looking for, The M40i I'm debating is a 2019, so it's possible it could have the higher HP rating?
Thats the main difference Im concerned about TBH. Also what is HPFP?

Intake manifold: gen1 has the square pattern. gen2 has the circle pattern.

High pressure fuel pump (hpfp): gen1 has the indent on top. gen2 is round.

gen1 rated at 355hp. gen2 rated at 382hp.

[Jolbex]

I think it is not that easy. I think there are 3 different engines produced in period 2018-2020. Mine (oct.2019, US made, DE market) is clearly an TU engine, with stronger hpfp, but with GPF and without MH. And it has 360 hp.
So there should be B58, B58TU and B58TU2

[mcdanielvzw]

Originally Posted by Jolbex

I think it is not that easy. I think there are 3 different engines produced in period 2018-2020. Mine (oct.2019, US made, DE market) is clearly an TU engine, with stronger hpfp, but with GPF and without MH. And it has 360 hp.
So there should be B58, B58TU and B58TU2

TU2 is not used in the X3 G01/X4 G02, period.

[Jolbex]

Aha, so which one is 384 hp then?

[sdamike]

Originally Posted by Gr8ZongB58

Intake manifold: gen1 has the square pattern. gen2 has the circle pattern.

High pressure fuel pump (hpfp): gen1 has the indent on top. gen2 is round.

gen1 rated at 355hp. gen2 rated at 382hp.

Thank you!

I'm assuming to check either one of those the engine cover needs to come off?

[sdamike]

Originally Posted by Alias1431

2019 will still have the burbles and pops if you're into that kind of thing. Only in select, higher modes.

This might help. Almost reads like marketing material, but good info. Realistically, they're about the same stock, but the TU will have more headroom to tune thanks to the higher pressure fuel pump.

Thanks, very informative!

[Gr8ZongB58]

Originally Posted by sdamike

Thank you!

I'm assuming to check either one of those the engine cover needs to come off?

Yes. Plastic cover pops right off.

[Jolbex]

Originally Posted by mcdanielvzw

TU2 is not used in the X3 G01/X4 G02, period.

So youre saying TU(1) is the above mentioned "2.gen"? My TU(1) has the pump without indent and only has 360hp, so semething doesnt add up.

[mcdanielvzw]

Originally Posted by Jolbex

So youre saying TU(1) is the above mentioned "2.gen"? My TU(1) has the pump without indent and only has 360hp, so semething doesnt add up.

It's not a TU then. The pump can be upgraded after the fact by an individual or dealer. TU all have increased HP - You can tell the difference based on the engine cover also, it's on the b58 wiki and I think marketing material describing the difference.

[Jolbex]

It is a TU! TU2 was introduced in 2022.

[mcdanielvzw]

Originally Posted by Jolbex

It is a TU! TU2 was introduced in 2022.

But not on the X3/X4.....

B58B30O1 (TU): 285 kW (382 HP)
edit
Applications:

2018–present G29 Z4 M40i (in countries not subject to EU emissions standards)
2019–present G20/G21 M340i
2020–present G01 X3 M40i
2019–present G02 X4 M40i

B58B30M2 (TU2): 280 kW (375 HP)
edit
2022–present G07 X7 xDrive40i
2023–present G70 740i
2024–present G05 X5 xDrive40i
2024–present G06 X6 xDrive40i
2024–present G60 540i xDrive

[Jolbex]

Not true. TU was presented in 2018 and there were various outputs between 32x hp and 37x hp. TU2 is something else. So the fact is that there is at least 1 (mine) TU which is 360hp, no hybrid, with particle filter. Produced 10/2019 for german market. TU 382hp was mild hybrid

[EV2DEMON]

B58B30O1 (TU) has a standard rating of 382 HP in the M40i. However, in European countries requiring particulate filter, it was rated at 360 HP. Same engine, different rating.

I'm not sure what you mean when you say the TU was mild hybrid. There are various systems implemented depending on production year and model, some hybrid some not.