Trying to open ECU case

[mjc85]

I am trying to follow instructions on how to install an aftermarket ECU

These ones here

http://www.pelicanparts.com/bmw/techarticles/JF-Tech/BMW_E30_3_Series_performance_chip_install.htm

I have got to the stage where i have pried back the small metal tabs but there is also 4 of these weird lookings screw/bolts on either side which are stopping me from opening the ECU casing

Here are some pics, how can i get these bolts out ? Do i need a special screwdriver or something

They are like star shaped with 6 apexs, not very clear in the pic

http://img55.exs.cx/img55/2250/dscn01035dq.jpg

http://img55.exs.cx/img55/3387/dscn0104change5nq.jpg

http://img55.exs.cx/img55/1394/dscn01050hs.jpg

I'm not actually trying to change my chip just yet, just want to make sure i dont already have an aftermarket one before i buy one, but the tabs look like they havn't been pried back before

Thanks
Mitch

[Rob]

called a torx bit in the usa, best bet is to find something that looks like this:

[kowalski]

you can also get a screw driver that'l fit a big star should also be able to get them loose they arn't that tight but if its starting to slip go get the right one

[mjc85]

Will this do the trick ?

http://www1.jaycar.com.au/productView.asp?ID=TD2035

[kowalski]

yeah that should do the trick or you could go to your local tool store with the unit and buy the 2 dollar screw driver that fits right in... its up to you tho