URO 34311156643 Brake Master Cylinder

Brake Master Cylinder for BMW 735i and 750iL

This URO brake master cylinder is a direct-fit hydraulic replacement for select BMW 7 Series models. It is built to OE dimensions for proper clearance and pedal performance, with corrosion-resistant EPDM piston seals for use with glycol-based brake fluid.

• Brake master cylinder for brake hydraulic repair
• OE-dimensioned construction for correct fit and function
• EPDM piston seals resist glycol-based brake fluid
• Available in high-quality alloy aluminum or cast iron construction
• Quality control performed during production
• 24 Month Unlimited Mileage Warranty

Detailed Product Overview

Part number 34311156643 is a URO brake master cylinder for BMW 735i, BMW 735iL, and BMW 750iL applications. It is engineered for the brake hydraulic system and is intended to replace a leaking or worn master cylinder before fluid loss affects the carpet or brake pedal performance. This part cross-references URO-002572 for the same application.

Common Problems This Part Can Address

• Brake fluid leaking from the master cylinder
• Soft, inconsistent, or sinking brake pedal feel
• Loss of hydraulic pressure in the brake system
• Fluid contamination around the brake booster area
• Brake performance issues caused by internal seal wear

Installation Notes

Before installation, inspect the brake lines, reservoir, and booster area for contamination or damage. After installation, bleed the brake system thoroughly and verify pedal firmness and fluid level. Confirm vehicle-specific fitment for 1987-1994 BMW 735i, 1988 BMW 735i and 735iL built to 02-1988, and 1988-1994 BMW 750iL.

Quality Assurance

URO Parts manufactures this master cylinder to OE dimensions and uses EPDM seals suited to glycol-based brake fluid. The part is backed by a 24 Month Unlimited Mileage Warranty.