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06-20-2006, 01:32 PM
Forgive my ignorance, but it's been a while since I've been following BMW. Is the engine in the Z4 M Coupe the same as the one in the E46 M3? If so, whatever happened to the controversy about the problem people were having with that engine, which BMW originally denied was a real problem? Did BMW come up with a significant modification that corrected the problem? Is there anything relating to that issue that could affect the engine in the Z4 M Coupe? Thanks.

06-20-2006, 03:49 PM
BMW salesman told me the block in the MZ4 is not the same as the E46 m3.

As for the bearing issue, BMW has worked this out with late model m3'
s and I would expect the MZ4 to not have this issue at all.

03' ZHP , Sapphire Black, Black Leather, Xenons , Moonroof

06-20-2006, 08:54 PM
I'm sure they must be the same block, it makes no sense that they'd be any different.

The issues with that engine were pretty much fixed through a couple of service actions that replaced some parts (rod bearings and oil pumps), and very few failures have occured since. I would not be concerned any longer.

06-21-2006, 08:55 AM

06-21-2006, 09:58 AM
03' ZHP , Sapphire Black, Black Leather, Xenons , Moonroof

06-27-2006, 09:10 PM
Correct. Salesman lied. Is that possible? Noooooo!

06-28-2006, 11:42 AM
It is the S54 engine - different exhaust probably accounts for 330 hP rating instead of M3's 333.

The bearing issue appears to have been resolved with 2004 model year M3, starting around 6/03 production. I've seen no reports of bearing issues since then.

Previous production M3s were all recalled, er uh, called in for a "service campaign" but that did not include the 01-02 M Coupes as discussed many many times here. Z4M engines should probably be ok.

06-29-2006, 09:47 AM
Didn't they have a different redline on the Z3M and M Coupe? I thought it was down around 7500. Probably just enough to keep the crank from whipping around.

07-02-2006, 03:59 PM

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