ÜRO Parts Coolant Expansion Tank VW GOLF MK4 GTI audi A3 S3 1J0121407F | VW Audi Skoda Seat

Product Overview

Replace your cracked, leaking, or yellowed factory reservoir with this premium ÜRO Parts Coolant Expansion Tank.

Engineered to match original equipment standards, ÜRO coolant tanks are manufactured from high-grade, heat-stabilized plastic designed to withstand the extreme temperature fluctuations and high pressures of modern European cooling systems. Over time, factory tanks become brittle and prone to hairline fractures; this direct-fit replacement restores your cooling system's integrity, preventing dangerous coolant loss and engine overheating.

Key Features & Benefits

• Direct-Fit OE Replacement: Matches factory dimensions, mounting points, and hose connections precisely for a hassle-free install.
• Premium Material Construction: Molded from durable, heat-resistant polymer to prevent premature splitting, cracking, and discoloration.
• Includes Fluid Level Sensor: Comes with the integrated electronic level sensor pins to keep your dashboard warning system functioning perfectly.
• Pressure-Tested Integrity: Factory-tested to ensure it handles standard cooling system operating pressures without failure.

Technical Specifications

• Manufacturer: ÜRO Parts
• Product Type: Engine Coolant Recovery Tank / Expansion Bottle
• Material: High-Grade Virgin Plastic
• Sensor Included: Yes (2-pin connector)
• Cap Included: No (Re-use your factory cap or purchase separately)

Common Vehicle Compatibility

This expansion tank is a widely used fitment across the Volkswagen Audi Group (VAG) platform, specifically covering many late-90s to mid-2000s models. Popular applications include:

• Volkswagen: Golf Mk4, Jetta/Bora Mk4, Beetle (1998–2010), Passat B5
• Audi: A3 (8L), TT (8N)
• Skoda: Octavia Mk1 (1U)
• Seat: Leon Mk1 (1M), Toledo Mk2

⚠️ Fitment Note: Please verify your vehicle’s factory tank matches the shape and the part number ending in "F", as VAG vehicles utilize highly similar-looking reservoirs with different sensor configurations or hose routing.

Reference Numbers & Cross-References