BMW's Twin Turbo V8 problems

[lemetier]

S63 cars aren't effected by this with the exception of the battery and only then if the DME has stored multiple faults for discharge. The N63t is the problematic car and N63tu (which is modified based on a few attributes of the S63T0) has resolved most of these problems. All M5 have the larger main battery, the aux after-run pumps are different in operation, turbos are different, oil system different, vacuum system modified, different pistons and piston rings, etc etc.

The next which is in the F85/86 is the S63T2 and its differences are solely based on AWD and intake cooling area.

For us S63 folks, there is nothing to see here beyond inapplicable chatter.

[visualguy]

Originally Posted by miamiten

The N63t is the problematic car and N63tu (which is modified based on a few attributes of the S63T0) has resolved most of these problems. All M5 have the larger main battery, the aux after-run pumps are different in operation, turbos are different, oil system different, vacuum system modified, different pistons and piston rings, etc etc.

The next which is in the F85/86 is the S63T2 and its differences are solely based on AWD and intake cooling area.

For us S63 folks, there is nothing to see here beyond inapplicable chatter.

BMW improved quite a lot of things in the N63TU2 when compared to the N63TU. The improvements aren't there in the S63TU engine.

For example, they changed the piston ring design in the N63TU2 to reduce oil consumption. The S63TU has the old design of the N63TU.

There are numerous other improvements, and I guess these will be in the S63TU2 in the next-generation M5. For those interested, there is a 134-page document from BMW which describes the many changes in the N63TU2 engine.

[MCarsFan]

Originally Posted by greentrbo95gst

I believe 2014 cars and up are part of the new policy by BMW NA and they replace the batteries on them.

Yes