Porsche 957 Cayenne Brake Vacuum Pump 03H1451008- Used Original Parts

Diagnosis and Common Symptoms

From a technician's perspective, a failing brake vacuum pump on the Porsche 957 Cayenne presents clear, diagnosable symptoms. The primary complaint is a significantly hard brake pedal, requiring excessive physical effort to slow the vehicle. This is due to the loss of vacuum assistance to the brake booster. On the instrument cluster, you will often see a "Brake System Fault" or "PSM Failure" warning, as the system's pressure sensors detect an insufficient vacuum. When scanned with a diagnostic tool, fault codes such as P1479 (Brake Boost Vacuum System, Mechanical Failure) or related pressure sensor plausibility errors are typically stored. A hissing sound near the engine's cylinder head, where the pump is located, can also indicate an internal or external leak.

Introduction

Restore your Porsche's critical braking power with a Genuine used brake vacuum pump from M.S. Motor. Each component is professionally salvaged and undergoes rigorous bench testing to confirm it generates and holds vacuum pressure according to factory specifications. This part has been verified by our technicians to be a fully functional, direct-fit replacement, ensuring a seamless installation and the return of proper brake assist.

Product Details

• Brand: Porsche
• Model Compatibility: Porsche Cayenne (957) - Specifically for 3.6L V6 models
• Part Name: Engine-Driven Brake Vacuum Pump
• Part Number: 03H145100B
• Condition: Genuine Used (Tested Working)
• Notes: This is a mechanical, camshaft-driven pump. We have confirmed the integrity of the internal vanes and seals. Proper installation and lubrication are critical for longevity.