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Brake system — technical characteristics (BMW X3 E83)
Checking and bleeding the brake system
| Indicator | Dimension | Meaning |
| Check for leaks with the engine stopped; if necessary, first remove air from the vacuum cavity = approx. 10 full presses of the brake pedal | ||
| Pedal force | N | 500 |
| Pressure in pipelines | bar | 32 |
| Maximum allowable pressure drop within 2 minutes | % | 8 |
| Checking the operation of the brake booster (with the engine running) | ||
| Pedal force | N | 200 |
| Pressure in pipelines | bar | 95-115 |
Front brakes
| Indicator | Dimension | Meaning |
| Permissible difference in thickness of brake discs | MM | 0,01 |
| Brake disc outer diameter Models: 2.0 d, 2.0 i, 2.5 Si, 3.0 d, 3.0 i, 3.0 Sd | MM | 325 |
| Brake Disc Outer Diameter Models: 3.0 Si | MM | 332 |
| The brake lining wear alarm is activated when the remaining lining thickness is reached | MM | 3,0 |
| The minimum thickness of the brake disc (MIN TH) is stamped on the end of the disc. Models: 0 d, 2.0 i, 2.5 Si, 3.0 d, 3.0 i, 3.0 Sd | mm | 23,4 |
| Minimum brake disc thickness (MIN TH) is stamped on the end of the disc Models: 3.0 Si | mm | 28,4 |
| Max thickness of metal that can be removed during grinding from one working surface of the disc (are not processed on M models!) | mm | 0,8 |
Rear brakes
| Indicator | Dimension | Meaning |
| Permissible difference in thickness of brake discs | mm | 0,01 |
| Brake disc outer diameter | mm | 320 |
| The brake lining wear alarm is activated when the remaining lining thickness is reached | mm | 3,0 |
| The minimum thickness of the brake disc (MIN TH) is stamped on the end of the disc | mm | 20,4 |
| Max thickness of metal that can be removed during grinding from one working surface of the disc (are not processed on M models!) | mm | 0,8 |
Parking brake
| Indicator | Dimension | Meaning |
| Handbrake drum diameter | mm | 185 |
| Minimum friction lining thickness | mm | 1,5 |
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Article verified: Polikarpov Saveliy
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