2007 3.0si Differences (vs 06, 05 etc.)

B

bdelaney

New member
 Greenville, SC
Hello Everyone,
I just purchased a 07 Z4 3.0si coupe (auto, sport pkg, prem pkg).
Being an old gear head (5.0l Mustangs), I have started to research to see what performance tweaks are to be had. Unfortunately, it looks I will have to wait a while. I have found that the 06-07 engines are significantly different, and there are many differences between 06 and 07. For example if you look at the detailed instructions for a cold air intake on an 06, you will find that the Mass Air Sensor mounts to the air box on an 07, while it is a separated from the air box on an 06. Does anybody have a detailed list of differences? Also, how much oil does a 06 / 07 hold? I plan on changing my oil sooner than the 15K mark.
 
bdelaney, first welcome to the forum... :thumbsup:
The 2005 Z4 3.0i was supplied with the M54 engine. Both the 2006 and 2007 3.0si are supplied with the N52 engine and I would think that any differences between them are minor. I am sure someone will come along that can provide a more detailed answer than I can... :)
 
I know about the horserpower difference... but does the 3.0si have a completely different engine or this is a an exhaust/intake/chip thing? If it's not a completely different engine, I was wondering if there's anything I can do to my 3.0i to make it a 3.0si.
 
plantkiller said:
I know about the horserpower difference... but does the 3.0si have a completely different engine or this is a an exhaust/intake/chip thing? If it's not a completely different engine, I was wondering if there's anything I can do to my 3.0i to make it a 3.0si.
Click to expand...
Same displacement and engine control system. Magnesium-aluminum composite alloy crankcase saves 30lbs over 3.0 and the valvetronic (vanos) is more advanced. I believe intake and exhaust components differ too.
 
Copied From Wikipedia:

The BMW N52 is the BMW's latest straight-6 engine, which debuted in 2004 on the BMW E63 630Ci. Its crankcase is made entirely of magnesium and aluminum, a first in the world of engine construction. BMW used Alusil aluminum cylinder sleeves, which offer high heat conductivity, and cast them into a lightweight magnesium block [1], creating one of the lightest production engines of its size class in the world at 161 kg (354 lb).

It includes BMW's second generation Valvetronic system and Double-VANOS for fuel-efficiency (12% fuel savings over the previous generation BMW M54 engine - and increases performance. Producing 63 kW (85.5 hp) per liter of displacement, it has the lowest weight per horsepower of any six cylinder engine (1.24 hp per kilogram with the latest version). It is the world’s lightest six-cylinder engine.

It was awarded as one of Ward's 10 Best Engines of the Year in 2006 and 2007. Technologically it is even more advanced than the new N54B30 bi-turbo, which is based on an older M54B30 design and lacks several improvements that BMW has made for this engine.

All BMWs are available with this engine in at least one version - the only exception being the X5 which still uses the predecessor, M54B30 as its 3.0 Liter gasoline engine option.

The N52 is BMW's 12th generation production straight-6 engine.
 
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