PowerStop L4990J Disc Brake Caliper - Front Right

PowerStop Front OE Stock Replacement Caliper Overview

The PowerStop - Front OE Stock Replacement Caliper (Part Number L4990J) is designed specifically for Jeep Commander and Grand Cherokee models. This disc brake caliper offers reliable performance with a cast iron construction and a floating caliper design, ensuring consistent braking response and durability.

• Compatible with Jeep Commander and Grand Cherokee front brake systems
• Cast iron caliper casting for strength and heat resistance
• Floating caliper type with two phenolic pistons (48.01 mm diameter)
• Includes caliper slides and mounting bracket for proper fitment
• Gray finish with M10 x 1.0 bleeder screw thread size
• Regular grade type for standard braking applications

Detailed Product Features and Specifications

This PowerStop front disc brake caliper is engineered with a cast iron body to withstand the rigors of daily driving and maintain structural integrity under heat stress. The floating caliper design allows for smooth piston movement, reducing uneven pad wear. It features two phenolic pistons, each measuring 48.01 mm in diameter, which help reduce heat transfer to the brake fluid and improve overall braking performance. The caliper comes with included caliper slides and a mounting bracket to ensure proper installation and alignment on Jeep Commander and Grand Cherokee vehicles. The gray finish provides corrosion resistance and a clean appearance. The bleeder screw thread size is M10 x 1.0, compatible with standard brake bleeding tools.

PowerStop - Front OE Stock Replacement Caliper Product Line

The PowerStop - Front OE Stock Replacement Caliper line focuses on delivering direct replacement parts that meet original equipment specifications. This product line is designed to provide a balance of durability and performance for everyday driving conditions, making it suitable for Jeep Commander and Grand Cherokee owners seeking reliable brake system components without modification.

Common Applications and Problem Solving

• Replacement for worn or leaking front disc brake calipers on Jeep Commander and Grand Cherokee
• Addresses uneven brake pad wear caused by sticking calipers
• Resolves brake fluid leaks due to damaged or corroded caliper pistons
• Improves braking consistency when original calipers have lost efficiency
• Restores proper brake function after caliper hardware failure

Installation Notes and Tips

Ensure the brake system is fully depressurized before removing the old caliper. This caliper includes the mounting bracket and caliper slides but does not include mounting hardware, so verify you have the necessary bolts and tools. Use the correct M10 x 1.0 bleeder screw for brake fluid bleeding. Inspect brake pads and rotors for wear and replace if necessary to maintain optimal braking performance. Follow manufacturer torque specifications during installation.

Quality Assurance and Warranty

PowerStop manufactures this front OE stock replacement caliper to meet or exceed OEM standards for fit, form, and function. The cast iron construction and phenolic pistons are selected for durability and heat resistance. While specific warranty details are not provided, PowerStop products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.