Coolant Leak After Reinstalling a Hose or Water Pipe?

Replace the Small O-Ring That Commonly Causes Major Coolant Leaks.

The factory coolant pipe O-ring seal is designed to create a leak-proof seal between coolant pipes, hose connectors, thermostat housings, and coolant flanges.

Over time, exposure to:

• engine heat
• coolant chemicals
• pressure cycles
• aging rubber
• repeated removal

can cause the original seal to:

• flatten
• harden
• crack
• lose sealing pressure

A worn coolant O-ring may cause:

✔ Coolant leaks
✔ Low coolant warning light
✔ Coolant smell from engine bay
✔ Air entering cooling system
✔ Overheating risk
✔ Leaks after water pump or thermostat repairs

This OEM-style coolant pipe O-ring seal is designed to restore proper sealing performance and prevent coolant leaks.

Manufactured from heat-resistant automotive-grade rubber, it provides reliable direct-fit sealing performance for selected Volkswagen, Audi, and Skoda vehicles.

Key Features & Benefits

✔ OEM-style aftermarket replacement
✔ Restores proper coolant system sealing
✔ Helps eliminate coolant leaks
✔ Heat-resistant rubber construction
✔ Resistant to coolant chemicals and pressure
✔ Ideal replacement during cooling system service
✔ Direct-fit installation
✔ No modification required

Product Specifications

Part Type:
Coolant Pipe O-Ring Seal / Coolant Connector Gasket

Material:
Heat-Resistant Automotive Rubber

Reference OE Part Numbers:

• N90765301  10PCS

Compatible With Selected Models

Volkswagen

• Golf
• Jetta
• Passat
• Tiguan
• Beetle
• CC
• Touran
• Touareg

Audi

• A3
• A4
• A5
• Q3
• Q5

Skoda

• Octavia
• Superb
• Fabia

Compatible with many Volkswagen Audi Group cooling system applications.

Please verify OE part number before purchase.

Volkswagen parts catalogs identify N90765301 as a coolant pipe sealing O-ring used on multiple VAG cooling system connections.