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Oil Tank

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94410709101
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Oil Filler Cap and O-ring

porsche

Fits:
Porsche 911 1978-89
Porsche 964 1989-94
Porsche 968 1992-95
Porsche 924S 1986-88
Porsche 944 2.7L 1989
Porsche 944 S2 3.0L 1989-91
Porsche 944 2.5L Turbo 1986-91
Porsche 944 2.5L Turbo S 1987-88
Porsche 928 S4 / GT / GTS 1987-95

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94410709101
94410709101
94410709100
94410709101
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94410719102

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94410709101/1
Product Information
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Oil Filler Cap.

oematch

Fits:

Porsche 911 SC 1974-83 SPORTMATIC ONLY
Porsche 911 Turbo (3.3L) 09/1977-07/1989
Porsche 964 1989-94
Porsche 968 1992-95
Porsche 924S 1986-88
Porsche 944 2.7L 1989
Porsche 944 S2 3.0L 1989-91
Porsche 944 2.5L Turbo 1986-91
Porsche 944 2.5L Turbo S 1987-88
Porsche 928 S4 / GT / GTS 1987-95



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Related, superseded, cross reference or alternative numbers for comparison.

94410709101
94410709101
94410709100
94410709101
94410709104
94410719102

The product you are viewing cross references to these numbers
Special Order item
99970184640
Product Information
Product Information
Oil Tank Cap Gasket.

porsche

Fits:
Porsche 911 1984-89
Porsche 964 1989-94
Porsche 924S 1986-88
Porsche 928 1987-95
Porsche 944 1985-91
Porsche 968 1992-95

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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Related, superseded, cross reference or alternative numbers for comparison.

99970184640
99970184640

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
About Oil Tank

Engine Oil Tanks – Reliable Lubrication and Temperature Control for Porsche Engines

Engine oil tanks are a vital component in Porsche’s high-performance lubrication systems, especially in models equipped with dry-sump or performance-oriented engines. These tanks store, circulate, and cool engine oil, ensuring the correct oil pressure and temperature are maintained under all driving conditions - from everyday use to track performance.

At Design911, we supply a wide range of genuine and high-quality engine oil tanks for Porsche models including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each tank is designed to match the factory’s engineering precision, providing exceptional oil flow, pressure control, and durability to keep your Porsche performing at its best.

What Do Engine Oil Tanks Do?

The engine oil tank forms the heart of your Porsche’s lubrication system, performing several key roles:

  • Stores and circulates engine oil to maintain a continuous supply under all conditions.
  • Separates air and oil to prevent foaming and maintain oil pressure.
  • Assists in temperature regulation, allowing excess heat to dissipate efficiently.
  • Ensures optimal lubrication for engine components, reducing friction and wear.

In Porsche’s dry-sump systems, the oil tank is particularly important — allowing the engine to sit lower for better handling while ensuring consistent oil delivery even under high G-forces.

Why Do Engine Oil Tanks Fail?

While designed for long-term reliability, engine oil tanks can deteriorate or fail over time due to mechanical stress, corrosion, or contamination. Common causes include:

  • Cracks or leaks from vibration or impact damage.
  • Corrosion caused by moisture, condensation, or old oil residue.
  • Blocked breather systems leading to pressure imbalance.
  • Internal contamination from sludge or metal debris.
  • Deteriorated seals or fittings causing oil leaks or pressure loss.

Signs of failure may include visible oil leaks, fluctuating oil pressure readings, or an oil smell around the engine bay.

Why Replace a Faulty Engine Oil Tank?

A damaged or leaking oil tank can cause oil loss, low pressure, or poor cooling — all of which risk severe engine damage. Replacing a faulty tank ensures consistent oil supply, stable pressure, and optimal engine protection.

Benefits of replacement include:

  • Restored oil circulation and pressure stability.
  • Prevention of leaks and oil starvation. 
  • Improved lubrication and temperature management.
  • Manufacturer-quality materials for long-lasting reliability.

All tanks in this range are built to meet or exceed original engineering standards, using high-grade alloys or reinforced composites to deliver durability, corrosion resistance, and a precise factory fit.

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