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Starting at $26.95, AutoBuffy stocks 1 disc brake caliper guide bushing kits from URO. These small rubber-sleeved metal sleeves let the caliper slide freely so brake pads wear evenly and release cleanly. When they seize or crack, the caliper binds, causing uneven pad wear, pulling, and premature rotor damage.
The main decision is material quality and kit completeness. A full kit should include the bushings, sleeves, boots, and grease needed for one axle. Skimping on rubber quality leads to early cracking, especially in climates with extreme heat or road salt exposure.
| Option | Best for | What you get |
|---|---|---|
| OE-Equivalent Kit | Drivers who want factory-matched fitment and lifespan | EPDM rubber boots, steel sleeves, and pre-measured brake caliper grease packet sized for the application |
| Heavy-Duty / Extended-Life Kit | High-mileage vehicles, tow/hauling use, or frequent city stop-and-go driving | Upgraded silicone boots rated for higher heat, thicker-walled steel bushings, and larger grease supply |
| Front Axle Kit | Replacing only the front calipers' hardware after front pad and rotor service | Complete hardware for both front caliper brackets — bushings, boots, and grease for one axle |
| Rear Axle Kit | Vehicles with rear disc brakes showing binding or uneven rear pad wear | Complete hardware for both rear caliper brackets, often including parking-brake pin hardware where applicable |
Remove the wheel, slide off the caliper, and withdraw the guide pins to expose the old bushings and boots in the bracket bores. Clean the bores thoroughly with a wire brush, press or slide in the new sleeves and boots, and apply the kit-supplied grease before reinstalling the pins. Reinstall the caliper and torque all fasteners to the manufacturer's specification found in the Bmw 335D service manual before lowering the vehicle and pumping the brake pedal to seat the pads.