Buy Rear Brake Caliper (Left), KJ 05-07 (5179731AA)

The Rear Brake Caliper (Left), KJ 05‑07 (5179731AA) is a factory‑style replacement

component designed specifically hfor the left (driver’s) side rear disc brake assembly

on Jeep Liberty (KJ) vehicles produced fromh 2005 to 2007. As one of the most

important parts of the braking system, this caliper is responsible for applying hydraulic

pressure to the brake pads, forcing them against the rotor to slow or stop the vehicle reliably and safely under a variety of driving conditions.

Manufactured to OEM specifications, the 5179731AA rear caliper is engineered to match

the exact shape, mounting pattern, piston size, and fluid passage design of the original

equipment. This ensures direct bolt‑in fitment without modifications, keeping the

factory brake geometry, ABS performance, and pedal feel intact. Designed to work with stock

brake pads and hoses, it integrates seamlessly with the overall rear brake system on 2005–2007 KJ models, maintaining balanced braking and stable stopping power.

The caliper housing is typically made from durable cast iron or high‑strength

aluminum alloy, materials selected for their strength, heat resistance, and ability to

withstand repeated brake pressure cycles. Inside this housing sits one or more pistons that

respond to hydraulic fluid pressure from the master cylinder. When the driver applies the

brakes, fluid is forced into the caliper bore, pushing the piston outward. This action clamps

the inner brake pad against the rotor, while the caliper slides allow the outer pad to make consistent contact as well—creating even clamping force across both pads.

The rear caliper also incorporates sealed piston

The rear caliper also incorporates sealed piston assemblies and dust boots that protect

internal components from moisture, dirt, and road contaminants. These seals prevent brake

fluid leakage and help ensure smooth piston movement over time. A well‑functioning caliper

reduces the risk of brake drag, uneven pad wear, or wheel pull during braking.

Replacement of the 5179731AA caliper is recommended if there are signs of fluid leakage,

piston corrosion, sticking or binding during brake application, unusual noise, or

uneven brake pad wear on the left side. Common symptoms include a braking pull to one

side, reduced braking performance, or a soft pedal that doesn’t firm up under normal pressure.

Installation of the rear left caliper generally involves removing the rear wheel, detaching the old caliper from the brake line and mounting bracket, and securing the new caliper in place with proper torque. Following installation, the brake system must be properly bled to remove any air in the lines and restore full hydraulic pressure.

In summary, the Rear Brake Caliper (Left), KJ 05‑07 (5179731AA) is a robust, OEM‑compatible solution that restores reliable braking performance on the driver’s side of Jeep Liberty models. Its precise fit and durable design help ensure safe and effective rear braking under everyday and demanding driving conditions.