Technical Data
| Brake System Leak Test (Engine Stopped) If applicable, discharge vacuum reservoir by operating brake pedal firmly about 10 times. | Force on Pedal (Approx) | 500 N |
| Equals Line Pressure (Approx.) | 28 - 33 Bar (bar) | |
| Maximum Pressure Drop (Within 2 min.) | 8% | |
| Brake Booster Function Test (Engine Running) | Force On Pedal (Approx) | 200 N |
| Line Pressure | 75 - 90 Bar (bar) | |
| Wear Warning | From Residual Lineing Thickness | 3.0 mm |
| Front Brake Disc Minimum Thickness | 728i and 730i | 26.4 mm |
| 740i | 28.4 mm | |
| 750i | 30.4 mm | |
| Rear Brake Disc Minimum Thickness | 728i, 730i and 740i | 10.4 mm |
| 750i | 18.4 mm | |
| Maximum Machining Limit M models may not be machined. | Per Friction Side | 0.8 mm |
| Difference in Thickness of Brake Linings | Maximum | 0.01 mm |
| Top Runout Of Brake Surface Measured at largest diameter of brake surface. | Disc Installed (Maximum) | 0.2 mm |
| Disc Removed (Maximum) | 0.04 mm | |
| Surface Finish Of Braking Surface | Fine Ground | 0.5 - 3.5 Ra u |
| Front Brake Disc Diameter | 730i | 316 mm |
| 740i | 324 mm | |
| 750i | 334 mm | |
| Rear Brake Disc Diameter | 730i and 740i | 324 mm |
| 750i | 328 mm | |
| Parking Brake | Drum Diameter | 180 mm |
| Radial Runout Of Braking Surfaces (Max.) | 0.1 mm | |
| Surface Finish Of Braking Surface (Fine Ground) | 0.5 - 3.5 Ra u | |
| Minimum Liner Thickness | 1.5 mm |