PowerStop L4991 Disc Brake Caliper - Front Left

PowerStop Front OE Stock Replacement Caliper Overview

The PowerStop - Front OE Stock Replacement Caliper (Part Number L4991) 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
• Grade type: Regular for standard braking applications

Detailed Product Description

The PowerStop - Front OE Stock Replacement Caliper L4991 is engineered to match original equipment specifications for Jeep Commander and Grand Cherokee vehicles. Featuring a durable cast iron caliper casting, this floating caliper design uses two phenolic pistons with a diameter of 48.01 mm to provide smooth and consistent brake pad engagement. The inclusion of caliper slides and a mounting bracket ensures proper alignment and secure installation. The gray color finish offers corrosion resistance while maintaining a factory appearance. This caliper is designed for regular grade braking performance, making it suitable for everyday driving conditions.

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 faulty caliper slides
• Resolves brake drag or sticking issues due to piston malfunction
• Improves braking consistency when original calipers have deteriorated
• Restores proper brake fluid pressure with correct bleeder screw thread size

Installation Notes and Tips

When installing the PowerStop L4991 caliper, ensure the mounting bracket is securely fastened to maintain proper caliper alignment. Since mounting hardware is not included, reuse original bolts or acquire new hardware as needed. Bleed the brake system thoroughly using the M10 x 1.0 bleeder screw thread size to remove air and ensure optimal brake performance. Verify piston movement and caliper slide operation before completing 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 contribute to long service life and reliable braking performance. While specific warranty details are not provided, PowerStop products typically come with a limited warranty against defects in materials and workmanship.

About the PowerStop - Front OE Stock Replacement Caliper Line

The PowerStop - Front OE Stock Replacement Caliper product line focuses on delivering direct-fit replacement calipers that replicate original equipment specifications. This line is designed to provide Jeep owners with dependable braking components that maintain factory performance and safety standards. The L4991 caliper is part of this line, offering a balance of durability and compatibility for front brake systems on Jeep Commander and Grand Cherokee models.