34 21 Rear Brake Discs E89
WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
REAR BRAKE DISCS SPECIFICATION
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IMPORTANT:
New brake pads may only be fitted if the brake disc thickness is greater than the minimum brake disc thickness (MIN TH).
Minimum brake disc thickness during general inspection (GI): Nominal size thickness minus 2.4 mm (Not applicable to perforated brake discs and M vehicles) M vehicles and perforated brake discs: Nominal size thickness minus 1.6 mm Depending on: Engine type Transmission version Equipment specification (e.g. maximum load increase, chassis official-use, national version, etc.) different brake discs can be fitted The brake discs must always be assigned by way of the relevant vehicle identification number and the Electronic Parts Catalogue (ETK)! |
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| Different thicknesses on brake linings | Max. mm | 0.01 |
| Max. machining limit per friction ring side (M vehicles and perforated brake discs must not be machined). Brake disc minimum thickness (MIN TH) must not be undershot. |
mm | 0.8 |
| Nominal size (diameter x thickness) | mm | 324x20 |
| Nominal size (diameter x thickness) | mm | 300x20 |
| Brake disk minimum thickness (MIN TH) stamped on brake disk body | mm | 18.4 |
| Wear warning from residual lining thickness | mm | 3.7 |