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OEM E28 535is Brake Calipers Piston Bore

Discussion in 'E28 (1982-1988)' started by gusgriff, Mar 11, 2010.

    gusgriff guest

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    Does anyone know the piston bore for the front and rear calipers.

    Per RealOEM.com and Maximillian

    The front piston repair kit is #34111153208
    May be an ATE FN-57 (Caliper Assembly is FN-57/25)
    ( ??? 57/25 may mean 57mm or 25mm )

    The rear piston repair kit is #34211153194
    May be a 33mm Bore and a FTE product

    What is the difference between the E28 535is and M5 Master Cylinder? Info below from RealOEM.com

    E28 535is Master Cylinder #34311153053 is different PN from E28 M5 Master Cylinder #34311155270 but same size and type: 23,81MM ATE
    • Member


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    I'm not sure what the answer is, but I know what the answer is not. It is not 25mm. I could believe 57 ...

    gusgriff guest

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    Thanks for the reply. It is 57mm for fronts and 33mm for rears. I found info on a European manufacturers website.

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