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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 05-28-2005, 11:42 AM   #1 (permalink)
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Hello 5-series fans,

I've got a 5-speed manual '94 530i and am about to embark on replacing my rear calipers, rotors, pads, fluid, etc. The procedure is quite different for bleeding the lines for an ASC+T system than for an ASC system (without the +T). So, I'm not sure how I can be positive as to which one I have.

I have a button on the dash that is marked "ASC", and when activated, illuminates the cockpit display with an /!\ surrounded by an arrow. Since I don't have the owner's manual for the car and haven't seen other 530's equipped with ASC+T, I can't be sure of what mine is equipped with.

Anybody know how I can tell for sure?
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Old 05-28-2005, 04:39 PM   #2 (permalink)
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You shouldnt have ASC+T I dont think that started until 99 or 2000 in the 5 series.
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Old 05-28-2005, 06:12 PM   #3 (permalink)
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ASC+T started with the invent of the e39 in 1996 (in the UKat least).

You seem to be confused as to when it is activated - When you start the car ASC or ASC +T is "ACTIVATED", pressing the button "DEACTIVATES IT" - THINK ABOUT IT, THERE IS A BUTTON TO TURN "OFF" THE SAFETY FEATURES NOT TURN THEM ON. If you start the car and then give it some shit through a few bends you will often see the light come on momentarily, this is to show you that the ASC or ASC + T has kicked in cos you are pushing the car - as soon as it loses traction the computer compensates for your actions AND warns you by lighting the light. However, even on an ASC+T car the button only has ASC written on it!

Personally, bleeding brakes on an ASC or ASC+T should be exactly the same - you are just dispelling air from the system and traction control is naff all to do with it - asc or asc+t is controlled by sensors (THE ABS SENSORS IN FACT) NOT how much air is or isn't in the braking sytem.
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Old 05-30-2005, 12:05 AM   #4 (permalink)
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d3ity will become famous soon enoughd3ity will become famous soon enough
I believe my 95 e34 has ASC+T. Its listed in the manual circa 1995.
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Old 05-31-2005, 04:55 PM   #5 (permalink)
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Seems like the consensus is against my car having ASC+T (though the '95 has it). I'm going to proceed with bleeding the lines per the instructions for cars without the +T system and see what happens!

-btw, thanks to BeelZibub for the great explanation of the traction control system! Guess the keyword there was AUTOMATIC stability control. d'oh! ghead

Geoff
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