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Re: E39: Different brakes in 528i, 540i and 540iA (archive)

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Posted by Jim Cash on August 12, 1998 at 11:52:08:

In Reply to: E39: Different brakes in 528i, 540i and 540iA posted by Kenneth Lee on August 11, 1998 at 00:07:05:

: I thought all 5 series have the alumimum calipers. Is the different brake setup in the 540iA and 540i a misprint?

: Kenneth


Perhaps the data you saw has a "typo".

I looked in the parts data that I have for the Euro versions of the 528I and the 540I & 540iA (I assume the NA versions are the same)
- here is a synopsis.


Callipers
Front - 528 has different front callipers than the 540 (both 540's have the same part # )
Rear - all 3 cars have the same rear calliper part #.

Disks ( size - diameter/thickness in mm's)
Front - 528 is 296/22 mm's . Both 540's are 324/30 mm's.
Rear - all 3 cars are 298/20 (all same part #).

In inches the 540's disks are - front ( 12.8 x 1.18 in. ) & rear ( 11.8 x .79 ) - with single piston callipers ( cast iron front, aluminium rear ).


The 528's have aluminium callipers front and rear. I understand the 540's are cast iron at the front - but I have also had some conflicting input on this so I am not absolutely certain.


Hope that helps.

Cheers

Jim Cash
London, Ontario, Canada
BMW CCA 102929
E39 97 540iA



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