[dancing__narwhal]

I know they just started arriving but I’m dying to know. What’s the verdict on the TU2? Any of you have previous experience with the B58 and can comment on any differences in power, smoothness, etc.?

[smeal4128]

Don't have mine yet, but there was some commotion on YouTube about potential reliability issues. My .02 from reading through another BMW forum is that it was a select batch of bad parts.

On the other hand, I've read some positive things about the TU2, as well. All in all, it should be a slight upgrade from what I can gather - tough to improve on something that close to perfect.

[dba1t]

No one in the U.S. has taken delivery, or at least no one on the forum. Most are a few weeks out at minimum, presuming no delays.

[TankerFlight]

What was changed that people are so concerned about? Thought initial issues were exaggerated or self-induced.

[hrf]

Originally Posted by TankerFlight

What was changed that people are so concerned about? Thought initial issues were exaggerated or self-induced.

Exactly, some dude on ytube made a hype about engine issues to gain more views. This engine is simply the best and new TU2 is even better.

[dancing__narwhal]

It’s going to be a great engine. I saw a post from another forum where a tuner got pretty insane power from a 2024 740i which has the TU2.

[gnyce]

Originally Posted by dba1t

No one in the U.S. has taken delivery, or at least no one on the forum. Most are a few weeks out at minimum, presuming no delays.

it's in the 2025 m440

[Dan W]

Originally Posted by dba1t

No one in the U.S. has taken delivery, or at least no one on the forum. Most are a few weeks out at minimum, presuming no delays.

Really? I took delivery of a 2025 M440i coupe in May with the B58 TU2 engine. The engine has been terrific, very impressed (and this is my 8th BMW since 2003).

[335aw]

Originally Posted by dba1t

No one in the U.S. has taken delivery, or at least no one on the forum. Most are a few weeks out at minimum, presuming no delays.

You sure? They are on dealer lots right now. Have they not allowed factor orders until recently?

[dba1t]

Originally Posted by Dan W

Really? I took delivery of a 2025 M440i coupe in May with the B58 TU2 engine. The engine has been terrific, very impressed (and this is my 8th BMW since 2003).

You are correct. I jumped threads and mistook the question as being related to the M340i. Several of us are waiting on the first ship load of 2025 vehicles. None of those are sitting on dealer lots and online listings show only graphic illustrations of the vehicles, as dealers await shipments.

Please elaborate on your experience with the B58 TU2. What impresses you? Was your last vehicle equipped with a prior iteration of the B58? Is it your daily driver or a leisure/weekend vehicle? What fuel economy are you experiencing? Which engine cover did you receive? If not an M Sport exhaust equipped M440i, does your exhaust have OPF filters? Does your vehicle have a charcoal filter in addition to the paper filter? Have you done any modifications or running stock?

[Dan W]

Answering above - Also have a 2022 X3 M40i and the 2025 4 series coupe's B58 TU2 seems to have a bit more punch down low (M440i has a lower curb weight than the X3, so some of it could be power/weight ratio) and is even smoother than the previous B58. Daily driver, MPG of about 22 (mixed city and highway). Regular engine cover, not an "M version". Standard exhaust. Have no idea on OPF filters or charcoal filters. Only mods/changes: M perf floor mats, Michelin PS4S summer tires (replaced run flats).

[dba1t]

Originally Posted by Dan W

Answering above - Also have a 2022 X3 M40i and the 2025 4 series coupe's B58 TU2 seems to have a bit more punch down low (M440i has a lower curb weight than the X3, so some of it could be power/weight ratio) and is even smoother than the previous B58. Daily driver, MPG of about 22 (mixed city and highway). Regular engine cover, not an "M version". Standard exhaust. Have no idea on OPF filters or charcoal filters. Only mods/changes: M perf floor mats, Michelin PS4S summer tires (replaced run flats).

Thank you for the detailed response. Coming from the S63TU2, S54B32, B46/B48, N20/N26, and N52 engines, I do not have daily road experience with the B58. Again, I appreciate the detail.