Vacuum hose. Porsche 928 1987-95  ❭  92811022001

Vacuum hose / Brake booster line
This Genuine Porsche vacuum hose is used on Porsche 928 models within the intake/vacuum hose system and is associated with the brake booster vacuum circuit.

Fits:
Porsche 928 S4  1987 – 1991
Porsche 928 GT  1989 – 1991
Porsche 928 GTS  1992 – 1995

Diagram ref no 12

This hose is commonly described as the hose from the left intake side cover to the brake venturi “Y”.

Functions
• Routes vacuum through the engine intake/vacuum system
•  Supports correct brake booster vacuum supply
•  Helps maintain proper vacuum assistance for the braking system
•  Connects the left intake side cover area to the brake venturi “Y” connection
•  Helps prevent vacuum leaks that can affect idle quality and engine running
•  Maintains correct factory hose routing and fitment
•  Replaces aged, brittle, cracked or leaking original vacuum hose
•  Provides OE Porsche fitment for the 928 vacuum system.

Why Replace This Part?
Vacuum hoses become brittle, cracked, hardened or loose with age and heat exposure. A leaking vacuum hose can allow unmetered air into the system, which may cause rough idle, poor running, hesitation or reduced brake booster vacuum performance. Replacing the original hose with a Genuine Porsche OE vacuum hose helps restore the correct vacuum circuit, supports brake booster assistance and keeps the engine vacuum system operating as intended.

When to Replace This Part
•  If the hose is cracked, brittle, split or hardened
•  If there is a vacuum leak or hissing noise
•  If the engine has rough idle or poor running caused by unmetered air
•  If brake assistance feels reduced or inconsistent
•  During intake, vacuum system or brake booster vacuum repairs
•  During engine bay restoration or preventative maintenance
•  When replacing old, non-original or incorrectly routed vacuum hose
•  Before recommissioning a Porsche 928 that has been stored long-term.

Where It Fits on the Car
This hose fits in the engine bay vacuum system of the Porsche 928. It is associated with the LH-Jetronic intake hose system and connects the left intake side cover area to the brake venturi “Y” / brake booster vacuum circuit. Parts diagrams show this hose as diagram reference no. 12 in the LH-Jetronic hose section.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92811022001

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