HMMWV Humvee Hummer H1 Front Left Brake Caliper Assembly – 5745454 / 12342343

Upgrade or restore your vehicle's stopping power with this premium Front Left Disc Brake Caliper Assembly. Engineered as a direct fit replacement for military-grade AM General HMMWV (Humvee) and civilian Hummer H1 models, this driver-side brake component ensures reliable hydraulic pressure and optimal performance under extreme conditions.

Crafted to meet exact heavy-duty OEM specifications, this heavy-duty single-piston brake caliper provides the structural integrity, rigidity, and reliable stopping distance required for rugged off-road setups and demanding tactical operations. Whether you are performing a routine brake system repair or doing a complete multi-corner restoration, utilizing high-quality genuine replacement parts is vital for safety, road compliance, and optimal vehicle handling.

This front left brake caliper matches the 10K / 12K GVW configurations for the following vehicle models:

M998, M1025, M1026, M1035, M1037, M1038, M1042, M1043, M1044, M1045, M1046, M1097, M1113, M1114, M1123, M1151, M1152, M1165, Hummer H1

• Vehicle Pulling to One Side: If the caliper freezes or sticks in the "open" position, the vehicle will pull to the opposite side when braking. If it seizes in the "closed" position, the vehicle will constantly pull toward the driver's side even without pressing the pedal.
• Fluid Leaks Around the Wheel: Over time, the internal rubber piston seals degrade. If brake fluid is wet or dripping around the inner wheel, the piston seal has failed, causing a dangerous drop in hydraulic pressure.
• Spongy or Low Brake Pedal: Air entering the system through a failing caliper seal causes the brake pedal to feel soft, requiring you to push it further down to stop.
• Abnormal Brake Noise or Uneven Wear: A sticking caliper slider pin or piston causes the brake pads on the front left wheel to wear down much faster than the passenger side, often causing grinding, squealing, or scraping noises.
• Constant Drag or Excessive Heat: A seized caliper won't fully release the brake pad from the rotor. This creates extreme friction, leading to a burning smell, excessive heat radiating from the front left wheel, and reduced fuel mileage.