Centric 146.40034 Disc Brake Caliper Piston - Rear

Overview of Centric Premium Steel & Aluminum Caliper Pistons

The Centric Premium Steel & Aluminum Caliper Pistons, part number 146.40034, are engineered for reliable brake performance in select Ford, Mazda, Mercedes-Benz, and Mercury vehicles. Designed with precision, these steel pistons ensure consistent braking response and durability.

• Constructed from high-quality steel for strength and corrosion resistance
• Length: 55.64 mm for precise fitment
• Inside diameter: 31.41 mm to match OEM specifications
• Outer diameter: 39.95 mm (1.55805 inches) for accurate caliper housing fit
• Thickness: 5.14 mm (0.20046 inches) for optimal sealing and piston movement

Detailed Product Description

The Centric Premium Steel & Aluminum Caliper Pistons line focuses on delivering durable and reliable brake components. This particular disc brake caliper piston, part number 146.40034, is made from steel, providing enhanced resistance to wear and corrosion compared to standard pistons. Its dimensions—55.64 mm length, 31.41 mm inside diameter, and 39.95 mm outer diameter—are designed to meet the exacting standards required for proper brake caliper operation. The 5.14 mm thickness ensures a secure seal within the caliper bore, maintaining hydraulic pressure and preventing fluid leaks.

Compatible Vehicles and Applications

This caliper piston is compatible with a range of vehicles including Ford Escape and Mercury Mariner models, as well as several Mercedes-Benz models such as GL320, GL450, ML320, ML350, ML450, ML500, ML550, R320, R350, R500, and the Mazda Tribute. Using the correct piston ensures proper brake function and safety.

Common Issues Addressed by This Caliper Piston

• Brake fluid leaks caused by worn or damaged pistons
• Uneven brake pad wear due to piston sticking or corrosion
• Reduced braking efficiency from piston deformation
• Brake noise and vibration linked to piston malfunction
• Hydraulic pressure loss in the brake system

Installation Notes and Tips

When installing the Centric Premium Steel & Aluminum Caliper Piston 146.40034, ensure the caliper bore is clean and free of debris. Lubricate the piston with appropriate brake fluid or assembly grease to facilitate smooth movement. Verify all seals and dust boots are in good condition or replaced as needed to prevent contamination. Proper alignment during installation is critical to avoid piston binding.

Quality Assurance and Warranty

Centric Premium Steel & Aluminum Caliper Pistons are manufactured to meet or exceed OEM standards for material quality and dimensional accuracy. While specific warranty details for part number 146.40034 should be confirmed with the supplier, Centric products typically come with a limited warranty covering defects in material and workmanship.