PowerStop L5545 Disc Brake Caliper - Rear Left or Rear Right

Rear OE Replacement Caliper for Select GM Vehicles

PowerStop L5545 is a rear disc brake caliper built as a direct OE stock replacement for select Chevrolet, GMC, Buick, and Cadillac applications. It is remanufactured in Chicago, pressure tested for piston operation and leak prevention, and assembled with new internal and service components for consistent brake performance.

Key Features

• Rear floating disc brake caliper with 38.00 mm piston diameter
• Cast iron caliper body with gray finish
• Steel piston construction
• Caliper slides included for proper movement
• Mounting bracket included for OE-style replacement
• New seals, dust boots, bleeder screw, and stainless steel brake pad abutment clips installed during assembly
• High-temperature EPDM rubber dust boots and silicone lubricant used for smoother operation in demanding conditions
• Inlet thread size: M10 x 1.0; bleeder screw thread size: M10 x 1.0

Product Details

PowerStop’s Autospecialty OE Replacement Brake Calipers are built for drivers who want a stock-style rear caliper replacement without changing the original brake layout. The L5545 is a rear OE stock replacement caliper for applications such as the Chevrolet Equinox, GMC Terrain, Chevrolet Malibu, Buick Regal Sportback, Buick Regal TourX, Cadillac XT4, Buick LaCrosse, and related rear-position listings shown in the fitment data. This part number, L5545, is engineered to bolt directly in place of the original caliper and restore normal hydraulic braking function at the rear axle.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear brake drag caused by sticking caliper slides or piston movement issues
• Brake fluid leakage from worn seals or damaged caliper components
• Uneven rear braking from a worn or corroded caliper assembly
• Soft or inconsistent pedal response related to caliper wear
• Noise or pad contact problems tied to worn abutment hardware

Installation Notes and Tips

Verify rear left or rear right position before ordering, since fitment varies by vehicle and side. Confirm inlet and bleeder thread sizes match the original brake line and service hardware. After installation, bleed the brake system thoroughly and inspect pad contact, slide movement, and fluid sealing before returning the vehicle to service. For vehicles such as the Chevrolet Malibu and other rear parking brake applications listed, confirm the parking brake configuration matches the fitment notes.

Quality Assurance

PowerStop remanufactures the caliper and bracket in its Chicago, IL facility and pressure tests each unit to verify piston operation and help prevent leaks. The assembly process uses new seals, slide pins where applicable, dust boots, bleeder screws, and stainless steel brake pad abutment clips to support consistent OE-style service life.