Thread: FAQ Thread
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      04-20-2010, 03:00 PM   #1
MIKe86
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Drives: 90 332is
Join Date: Apr 2010
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Question FAQ Thread

I've been a lurker here for a little bit, and have posted here in there. This forum, although full of knowledge and what seems like nice respectful people, lacks a FAQ thread for simple questions.


I've been searching and can not seem to find a definitive answer for "What are the differences between 06, 07, and 08 M coupes and M roadsters?". I did come across a brief thread regarding all z's, but I'm interested in the M's in particular. I'm sure other newbies that came here before purchasing an M are too.


Hopefully we can get a nice compilation of FAQ and links to threads answering the questions here.


-What are the differences between 06, 07, and 08 M Coupes and Roadsters?
  • AUX-in for the stereo was added in 2007 but was not in 2006 cars.
  • All years power output/engine is the same.

    3.2L/198

    HP @ RPM
    330 @ 7900
    Torque @ RPM
    262 @ 4900

    Fuel Tank
    14.5 Gallons

How about TPMS? Anything else? Particular year certain options or colors came out? Power output, emissions regs, etc?


-Why does my tranny grind when I shift 1 ->2?
-What is this CDV that I keep reading about?
It is a clutch delay valve. Read here: *again, will update with relevant thread links for more reading*

-How rare is my z4m?.

-What are common issues with my z4m?
  • Motor Mount Bolts Issue
    Bolts needed are:
    M8X26mm with 1.25 pitch 10.9 Grade
    M8X35mm with 1.25 pitch 10.9 Grade
    M8 Hardened Washers

    Oem replacement bolts Part # which are 8.8 grade are:
    07119905724 M8X26mm
    07119905533 M8X35mm
    *these come with washers*

    McMaster-Carr Part numbers for comparable bolts are:
    90854A167 M8x25mm (1mm shorter than oem)
    90854A172 M8x35mm
    *note* they are only sold in packs of 25*

    91812A230 Wedge Lock Washer (Nord-Lock SS washers that prevent loosening)
    *note* Sold in packs of 5

    Torque to 21 N*m

    Realoem shows 6 of the M8X26mm & 2 M8X35mm
    http://www.realoem.com/bmw/showparts...64&hg=22&fg=05

    Link to more info:
    http://www.bimmerfest.com/forums/sho...9&postcount=42
    http://www.zpost.com/forums/showthre...=328626&page=2
    Thanks to Ron Stygar & others for providing all this info.
  • Rear sway bar mounts loosen up over time.
    • Indicated by squeaking/groaning/popping from the rear (in that order of progression over time). If left unaddressed, the bolts can back themselves all the way out and the mounts can fall off. Usually affects the driver's side.
    • Solution: Re-Torque the mounting bolts. Many have replaced the OEM fastners with Nordlocks to keep the problem from coming back every 5k miles or so.

  • Front strut-to-firewall braces loosen up over time.
    • Indicated by squeaking/groaning/popping from the front (in that order of progression over time).
    • Solution: Re-Torque the strut brace nuts/bolts (Depending on the build date of your vehicle, you'll have nuts or bolts up top). This will most likely need to be repeated every 5k miles or so.

  • Windshield wiper motor starts acting sporadic while in intermittent mode.
  • BMW Assist/SOS constantly being dialed.
    • Solution: Take it to the dealer.

  • Ejector stuck inside of buffer stop units.
    • if it's stuck down, and you push it and there's zero resistance and goes in farther, then the innards of the assembly have been lost. If, however, there is resistance, it could be that the adjustment mechanism has been triggered and the pin is being held in.
    • More Detail and Picture: http://forums.bimmerforums.com/forum....php?t=1286047
    • Solution: http://forums.bimmerforums.com/forum...4#post16999814 . Also one should NEVER slam the Z4s hood or you risk damaging these parts -- Hood should be pushed down on either side after being closed enough to latch the center safety catch.
  • Wrinkles in driver's face due to joker-style perma-grin.
    • Solution: None.

-CPO a big deal? Worth paying the dealer to CPO my vehicle?
Links to related threads...

See where I'm going? Hopefully we can get a nice little guide here for all newbs, I found it SUPER helpful when I stepped into the world of Ducati's recently. I would even link that thread right now if I could to show an example of what I mean, but again I'm on my bb. Would love to get this stickied, with eventual mod clean up if needed.


Thanks guys. Please add to it!!!

Last edited by MIKe86; 04-23-2010 at 12:41 AM..
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