URO 4F0121403T Engine Coolant Reservoir

Engine Coolant Reservoir for Audi A6 Quattro

This URO engine coolant reservoir is built for 2009-2011 Audi A6 Quattro applications and matches OE dimensions for proper sensor and hose connection alignment. The off-white transparent tank helps with coolant level checks, while the internal level sensor support keeps the cooling system monitoring function in place.

Key Features

• Fits 2009-2011 Audi A6 Quattro
• URO part number 4F0121403T
• Precision-molded to OE dimensions for correct fitment
• Off-white transparent reservoir for easier fluid level inspection
• Level sensor included with internal sensor design
• Built from materials selected to handle engine heat and cooling system exposure
• Factory pressure-tested before release
• Cross-references URO-013445 for the same application

Detailed Description

When replacing a cracked or leaking coolant expansion tank on an Audi A6 Quattro, matching the original shape and sensor layout matters. This URO coolant reservoir, part number 4F0121403T, is molded to OE dimensions so it aligns with the factory cooling system connections and sensor interface on 2009-2011 Audi A6 Quattro models. The transparent off-white body helps make coolant level checks easier during routine service.

This reservoir is designed for direct replacement use in the cooling system and is factory pressure-tested to verify integrity before installation. If you are searching for an Audi A6 Quattro coolant reservoir, Audi A6 Quattro expansion tank, or URO 4F0121403T replacement tank, this part addresses the original reservoir location and sensor configuration without requiring adaptation.

What It Helps Fix

• Coolant leaks from a cracked or aged reservoir
• Low coolant warnings caused by a faulty internal level sensor
• Visible coolant loss from a damaged expansion tank
• Poor fitment after using an incorrect replacement tank
• Cooling system service issues tied to reservoir heat damage

Installation Notes

• Verify the vehicle is a 2009-2011 Audi A6 Quattro before ordering.
• Transfer or reconnect the factory cooling system components as required by the vehicle setup.
• Inspect hoses, clamps, and the cap condition during replacement; cap is not included.
• Confirm the internal level sensor connection matches the original harness before final assembly.

Quality Assurance

URO manufactures this coolant reservoir with OE-style dimensions and pressure testing to support consistent fit and sealing performance. Part number 4F0121403T is backed by a 24 Month Unlimited Mileage Warranty.