PowerStop L4645 Disc Brake Caliper - Rear Right

Reliable Rear OE Stock Replacement Caliper for GM Vehicles

The PowerStop L4645 rear disc brake caliper is designed to provide dependable braking performance for select Buick, Chevrolet, Oldsmobile, and Pontiac models. Engineered as a direct OE stock replacement, this caliper ensures consistent stopping power and durability for your vehicle's rear braking system.

• Compatible with Buick Allure, LaCrosse, Chevrolet Impala, Monte Carlo, Oldsmobile Intrigue, Pontiac Grand Prix, Regal, and Century
• Floating caliper design with a single 38.10 mm steel piston
• Constructed from durable cast iron for long-lasting strength
• Includes caliper slides and mounting bracket for proper fitment
• Gray finish with M10 x 1.5 bleeder screw thread size
• Grade type: Regular for standard braking applications

PowerStop - Rear OE Stock Replacement Caliper Product Line

The PowerStop - Rear OE Stock Replacement Caliper line focuses on providing direct-fit replacements that match original equipment specifications. This product line is engineered to meet factory standards for fit, form, and function, making it suitable for routine maintenance or brake system repairs on compatible GM vehicles. The L4645 caliper maintains the integrity of the rear brake system by using quality materials and precise manufacturing processes.

Product Details and Specifications

The L4645 rear disc brake caliper features a floating caliper design with a single piston measuring 38.10 mm in diameter. The piston is made of steel, ensuring resistance to wear and heat. The caliper body is cast iron, providing structural durability under braking stress. Included caliper slides and a mounting bracket facilitate proper installation and alignment. The gray color finish helps resist corrosion and blends with the vehicle’s brake components. The bleeder screw thread size is M10 x 1.5, compatible with standard brake bleeding tools.

Common Applications and Problem Solving

• Replacement for worn or seized rear calipers on Buick Allure and LaCrosse
• Restores braking performance on Chevrolet Impala and Monte Carlo with sticking calipers
• Addresses brake drag or uneven pad wear on Oldsmobile Intrigue and Pontiac Grand Prix
• Fixes rear brake fluid leaks due to damaged piston seals
• Improves rear brake responsiveness on Pontiac Regal and Buick Century

Installation Notes and Tips

Ensure the brake system is properly depressurized before removing the old caliper. The L4645 caliper includes caliper slides and a mounting bracket but does not include mounting hardware, so retain or replace bolts as needed. Verify the bleeder screw thread size (M10 x 1.5) matches your brake bleeding tools. After installation, bleed the brake system thoroughly to remove air and restore proper hydraulic pressure. Inspect brake pads and rotors for wear and replace if necessary to maintain optimal braking performance.

Quality Assurance and Warranty

PowerStop manufactures the L4645 caliper to meet OE specifications using cast iron and steel components for durability and reliability. This caliper undergoes quality control inspections to ensure proper fit and function. While specific warranty details are not provided here, PowerStop products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.