fuel hose Genuine Porsche part 94435604114

 


Fits:
Porsche 924S 1986-88
Porsche 944 1982-85

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Diagram ref no 9

Porsche 924S & 944 Fuel Hose - Fuel Pump to Fuel Filter

Reliable Fuel Delivery for Classic Transaxle Porsche Models

The fuel hose from the fuel pump to the fuel filter is a critical component of the Porsche 924S and 944 fuel system. This hose transfers pressurised fuel directly from the fuel pump to the fuel filter, ensuring clean and consistent fuel supply to the engine.

Maintaining the integrity of this hose is essential for stable fuel pressure, smooth engine operation and overall vehicle safety.

Fits:

• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87

Diagram ref no 12

What This Fuel Hose Does

In the Porsche 924S and 944 fuel system, fuel is drawn from the tank by the electric fuel pump and pushed through a dedicated hose into the fuel filter. The fuel filter removes contaminants before fuel continues to the rail and injectors.

The fuel pump to filter hose is responsible for:

• Carrying pressurised fuel safely from pump to filter
• Maintaining consistent fuel pressure under load
• Preventing leaks in a high-pressure section of the system
• Supporting smooth engine idle and acceleration

If this hose fails, fuel delivery can become inconsistent or unsafe.

Why Fuel Hoses Fail on 924S and 944 Models

Fuel hoses on classic Porsche transaxle cars are often original or decades old. Over time, exposure to heat, vibration and modern ethanol-blended fuels can cause deterioration.

Common failure causes include:

• Age-related rubber hardening and cracking
• Internal breakdown from fuel permeation
• Swelling caused by ethanol content in modern fuels
• Heat cycling in the engine bay
• Abrasion against surrounding components

Because this hose operates under pressure, even minor cracks or weakness can result in leaks or pressure loss.

When You Should Replace This Fuel Hose

You should replace the fuel pump to fuel filter hose if you notice:

• Visible cracks, splits or softness in the hose
• Fuel smell near the rear or underside of the vehicle
• Dampness or seepage around hose connections
• Hesitation or stumbling under acceleration
• Poor fuel pressure readings
• The hose appears original or aged on a classic 924S or 944

Preventative replacement is strongly recommended during fuel pump or fuel filter service, especially on vehicles over 20 years old.

Replacing this hose helps prevent fuel leaks, improves engine reliability and protects against potential fire risk.

Quality Porsche Fuel System Parts from Design911

At Design911, we supply high-quality replacement fuel hoses designed to meet OEM standards for classic Porsche models. This fuel hose ensures correct fitment, proper pressure handling and long-term durability.

Using the correct specification hose protects your fuel system, improves reliability and maintains safe vehicle operation.

Key Benefits at a Glance

• Direct replacement for Porsche part 94435604112
• Connects fuel pump to fuel filter securely
• Maintains stable fuel pressure
• Reduces risk of leaks and fuel system failure
• Suitable for Porsche 924S and 944
• Ideal for maintenance, restoration and preventative repair       

Porsche 944 / 924S High-Pressure Fuel Hose XL – Safety Upgrade

Prevent Fuel Leaks and Reduce Engine Bay Fire Risk

One of the most common causes of engine bay fires in the Porsche 944 is failure of the main high-pressure fuel line. Over time, the original hose ages, hardens and develops cracks. When this line leaks, fuel can drip directly onto the hot exhaust manifold, creating a serious fire hazard.

Fits:

• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988

This upgraded XL high-pressure fuel hose is designed to eliminate that risk by improving routing and adding additional heat protection.

What the Main Fuel Hose Does

The main high-pressure fuel hose delivers pressurised fuel from the fuel rail and fuel system to the engine. It operates under constant pressure and high temperatures inside the engine bay.

Its function is critical to:

• Supplying consistent fuel pressure
• Maintaining proper engine performance
• Ensuring safe fuel delivery under load

Because this hose sits near the exhaust system in factory configuration, deterioration can quickly become dangerous.

Why Original Fuel Hoses Fail

Over decades of use, factory fuel hoses commonly suffer from:

• Age-related rubber cracking
• Heat exposure from the exhaust manifold
• Ethanol content in modern fuels
• Internal degradation under pressure
• Sudden splitting without warning

Fuel leakage can happen unexpectedly and escalate quickly.

Why You Should Upgrade to the XL Version

This XL high-pressure fuel hose has been redesigned for improved safety and longevity.

Key advantages include:

• Extra length to reroute the hose along the top of the bulkhead
• Avoids running directly over the hot exhaust
• Black heat-resistant outer sheath for added protection
• Improved routing reduces stress on fuel rail connections
• Helps prevent cracking at fuel rail fittings

By routing the hose away from the exhaust and securing it along the bulkhead, the risk of fuel contacting high heat components is significantly reduced.

In early models and 924S variants, the extended length allows cleaner routing under the spray piece, improving both appearance and reliability.

A vehicle lift is required for installation.

When You Should Replace Your Fuel Line

You should replace the main fuel hose if:

• The original line has never been replaced
• You notice fuel smell in the engine bay
• The hose shows cracking or brittleness
• You are restoring or maintaining a classic 944 or 924S
• You want preventative fire protection

Eventually, every original hose will require replacement. Upgrading now protects both your vehicle and your investment.

Key Benefits at a Glance

• Direct replacement high-pressure fuel hose
• Extra-long design for safer routing
• Avoids contact with hot exhaust components
• Heat-resistant outer protective sheath
• Suitable for all 944 years and 924S
• Helps prevent fuel rail connection cracking
• Ideal preventative safety upgrade