Centric 146.54042 Disc Brake Caliper Piston - Front

Centric Caliper Piston for BMW M3 and Porsche 928

Centric part 146.54042 is a front disc brake caliper piston built for specific BMW M3 and Porsche 928 applications. It uses steel construction and precise dimensional sizing to match the hydraulic and sealing requirements of the original brake assembly.

Key Features

• Steel caliper piston for front disc brake hydraulic service
• Part number 146.54042 for accurate catalog matching
• Piston outside diameter: 53.92 mm (2.10288 in)
• Inside diameter: 39.81
• Thickness: 7.21 mm (0.28119 in)
• Length: 53.13
• Centric Premium Steel & Aluminum Caliper Pistons product line

Product Details

Centric Premium Steel & Aluminum Caliper Pistons are built for brake hydraulic applications where piston size, material, and surface fit matter. This Centric caliper piston, part number 146.54042, is specified for front brake use on 1988-1991 BMW M3 and select Porsche 928 front brake applications, including 1978-1981 Porsche 928, 1982-1983 Porsche 928 with chassis note F92 DS86 1385 or F92 DS86 1386, and 1984-1985 Porsche 928. The steel piston construction and listed dimensions support proper caliper operation in the original brake system.

This part cross-references no listed alternate part numbers in the provided data.

What It Helps Address

• Brake caliper piston wear or scoring
• Hydraulic piston fitment issues during caliper service
• Front brake rebuilds on BMW M3 and Porsche 928 models
• Brake drag caused by a damaged or out-of-spec piston
• Restoration work requiring the correct caliper piston dimensions

Installation Notes and Tips

Verify the piston dimensions, inside diameter, and thickness against the original caliper before installation. Confirm the vehicle year, model, and front brake configuration, especially on 1982-1983 Porsche 928 applications with chassis-specific notes. Clean the caliper bore thoroughly and inspect seals, dust boots, and related hydraulic components during service.

Quality Assurance

Centric Premium Steel & Aluminum Caliper Pistons are cataloged for specific brake applications and dimensioned for accurate fitment in the listed front caliper assemblies. Part number 146.54042 is matched to the vehicle coverage shown above for BMW M3 and Porsche 928 front brake service.

Fitment

• Fits 1988-1991 BMW M3, front.
• Fits 1984-1985 Porsche 928, front.
• Fits 1978-1981 Porsche 928, front.
• Fits 1982-1983 Porsche 928, front, To Ch# F92 DS86 1385.
• Fits 1982-1983 Porsche 928, front, Fr Ch# F92 DS86 1386.