BMW 34216764651 Brake Disc, Ventilated

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If either disc requires replacement, it's essential to replace BOTH at the same time to ensure even and consistent braking. New brake pads should also be installed. Apply the parking brake, raise the front of the vehicle, support it on jackstands, and remove the appropriate front wheel. Inspect the disc surface for score marks and damage; light scratches are normal, but deep scoring may necessitate disc refinishing by an automotive machine shop. Ensure the disc isn't machined below its specified minimum thickness, which can be found stamped into the hub of the disc. If the disc is potentially warped, check it for runout using a dial indicator. Some professionals suggest resurfacing the discs during brake pad replacement for a smoother finish. Additionally, inspect the disc for cracks and wear. For removal, unscrew the bolts of the brake caliper mounting bracket, slide off the caliper assembly, and tie it to the front suspension coil spring. Mark the disc's relationship to the hub, remove the bolt securing the brake disc, and then remove the disc. For installation, ensure clean mating surfaces for the disc and hub, align marked points from removal, wipe any preservative coating from a new disc, position the caliper over the disc, and secure it. Finally, install the wheel, lower the vehicle, and depress the brake pedal a few times to ensure brake pads contact the disc. Check the brake operation before driving.

To install the brake disc, follow these steps:Ensure the mating surfaces of the disc and hub are clean and flat.Align the marks made during removal and tighten the disc retaining bolt to the specified torque.If a new disc was installed, wipe any anti-corrosion preservative coating from the disc with solvent before installing the caliper.Make sure the disc mounting surface on the hub is free from dirt and corrosion.Slide the caliper into position over the disc, ensuring the brake pads slide past both sides of the disc.Tighten the caliper mounting bolts to the specified torque.Install the wheel and lower the vehicle to the ground, then tighten the wheel bolts to the specified torque.

Some professionals suggest resurfacing the discs during brake pad replacement for a smoother finish.

After installing the brake disc, perform these final steps:Adjust the parking brake shoes and cable.Depress the brake pedal a few times to bring the brake pads into contact with the disc.Bleeding is not necessary unless the brake hose was disconnected from the caliper.Carefully check the operation of the brakes before driving the vehicle.Recheck the parking brake to ensure proper functionality.