Dorman D670174 Disc Brake Caliper Repair Kit - Front

Reliable Disc Brake Caliper Repair Kit for BMW and Ford Vehicles

The Dorman D670174 Disc Brake Caliper Repair Kit provides essential components to restore brake caliper function on select BMW and Ford models. Designed with durable EPDM rubber seals and boots, this kit supports effective brake maintenance and helps extend caliper service life.

• Includes 4 piston boots, 4 piston seals, and 4 crossover seals
• Boot length: 13.99 inches with 0.75 mm thickness for durability
• Piston bore diameter: 2.242 inches for precise fit
• Black EPDM rubber material for piston boots and seals
• Compatible with BMW 328i, 328xi, 335d, 335i, 335is, 335i xDrive, 335xi, X3, Z4 and Ford Expedition, Lincoln Navigator
• Standard replacement grade without installation hardware or bolts included

Durable EPDM Rubber Components for Effective Brake Repair

This Dorman disc brake caliper repair kit features piston boots and seals made from EPDM rubber, known for its resistance to heat, brake fluid, and environmental contaminants. The piston boot has an inside diameter of 46 mm and an outside diameter of 73 mm, ensuring a secure seal around the caliper piston. The piston seal’s outside diameter measures 2.504 inches, matching the 2.242-inch piston bore diameter for a precise fit. The black finish provides a professional appearance and corrosion resistance.

Compatible Vehicles and Part Number Details

The Dorman D670174 kit is compatible with a range of BMW models including the 328i, 328xi, 335d, 335i, 335is, 335i xDrive, 335xi, X3, and Z4. It also fits Ford Expedition and Lincoln Navigator vehicles. This compatibility ensures that technicians and DIY mechanics can rely on this kit for proper brake caliper servicing on these specific models.

Common Applications and Repair Solutions

• Restores sealing surfaces to prevent brake fluid leaks
• Replaces worn or damaged piston boots to protect caliper pistons
• Prevents contamination and corrosion inside the caliper bore
• Addresses brake drag caused by faulty seals
• Improves overall brake caliper performance and longevity

Installation Notes and Tips

Note that this kit does not include bolts, pins, or caliper grease, so additional hardware and lubrication may be required during installation. Ensure the caliper bore is thoroughly cleaned before installing new seals and boots. Proper alignment of piston seals and boots is critical to avoid leaks and ensure smooth piston movement. Follow vehicle-specific service manuals for torque specifications and installation procedures.

Quality Assurance and Warranty Information

Dorman provides this disc brake caliper repair kit as a standard replacement part manufactured to meet OEM specifications. The EPDM rubber components are designed for durability and resistance to brake system fluids. While installation hardware is not included, the kit is backed by Dorman’s quality standards to support reliable brake system repairs.