PowerStop L1979 Disc Brake Caliper - Rear Left

PowerStop Rear OE Stock Replacement Caliper Overview

The PowerStop - Rear OE Stock Replacement Caliper (Part Number L1979) is designed specifically for Audi A4 Quattro 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 Audi A4 Quattro rear brake system
• Cast iron caliper casting for strength and heat resistance
• Floating caliper type with one steel piston (38mm diameter)
• Includes caliper slides and mounting bracket for proper fitment
• Standard M10 x 1.0 inlet and bleeder screw thread sizes
• Gray finish for corrosion resistance and OEM appearance

Detailed Product Features and Specifications

This PowerStop rear disc brake caliper is engineered with a cast iron body, providing the necessary rigidity and heat dissipation required for effective braking on the Audi A4 Quattro. The floating caliper design allows for smooth piston movement and even pad wear. It features a single steel piston with a 38mm diameter, optimized for rear brake applications. The caliper slides are included to ensure proper alignment and operation, while the mounting bracket is supplied to facilitate installation. Both the inlet and bleeder screw have M10 x 1.0 thread sizes, matching OEM specifications for straightforward brake line and bleed screw compatibility. The gray color finish helps protect against corrosion while maintaining a factory look.

PowerStop - Rear OE Stock Replacement Caliper Product Line

The PowerStop - Rear OE Stock Replacement Caliper line focuses on providing direct replacement parts that meet original equipment standards. This product line is designed to restore braking performance to factory specifications without requiring modifications. The L1979 caliper is part of this line, offering a balance of durability and fitment accuracy for the Audi A4 Quattro rear brake system.

Common Applications and Problem Solving

• Replacement for worn or leaking rear brake calipers on Audi A4 Quattro
• Addresses uneven brake pad wear caused by sticking caliper pistons
• Resolves brake fluid leaks from damaged or corroded caliper pistons
• Improves rear brake responsiveness and pedal feel
• Restores proper brake alignment and reduces noise from caliper slides

Installation Notes and Tips

When installing the PowerStop L1979 rear caliper, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Verify that the mounting bracket is securely fastened and that caliper slides move freely to prevent uneven pad wear. Use compatible brake pads and hardware for optimal performance. Note that mounting hardware is not included and should be sourced separately if needed.

Quality Assurance and Warranty

PowerStop manufactures this rear OE stock replacement caliper to meet or exceed OEM standards for fit, form, and function. The cast iron construction and steel piston materials are selected for durability and corrosion 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 manufacturer resources for exact warranty terms.