Rein EPT0011 Engine Coolant Reservoir

OE Quality Expansion Tank for Audi A4

Rein EPT0011 is an OE-quality engine coolant reservoir built for the cooling system on select Audi A4 and Audi A4 Quattro models. It is made to match the original tank’s fit, material quality, and service requirements for a direct replacement on 2002-2006 Audi A4 Quattro and 2002-2005 Audi A4 applications.

Key Features

• Produced from virgin plastic to meet or exceed OE material specifications
• Resists cracking and wear caused by repeated heat cycles
• Direct-fit design supports straightforward installation
• Built to strict engineering standards for materials and tolerances
• Designed for long service life in the engine cooling system

Detailed Description

The Rein EPT0011 expansion tank is engineered as a replacement coolant reservoir for Audi A4 and Audi A4 Quattro vehicles that require OE-style fitment and dependable cooling system performance. Using virgin plastic instead of regrind helps improve durability and reduce the risk of premature cracking, which is important in a component exposed to constant temperature changes and coolant pressure. For buyers searching for an Audi A4 coolant reservoir, Audi A4 Quattro expansion tank, or Rein EPT0011 replacement tank, this part is built to restore proper coolant storage and system function.

This part cross-references URO 8E0121403A for the same application.

What It Helps Address

• Coolant loss from a cracked or leaking reservoir
• Visible plastic fatigue from repeated heat cycling
• Reservoir replacement after age-related deterioration
• Fitment issues caused by non-OE-style aftermarket tanks
• Cooling system service needs on Audi A4 and Audi A4 Quattro models

Installation Notes and Tips

Verify the part number and vehicle application before installation. Inspect the surrounding cooling system components, including hoses, caps, and mounting points, so the new reservoir can be installed on a clean, stable system. Confirm the tank seats correctly and check for leaks after refilling and bleeding the cooling system according to factory procedures.

Quality Assurance

Rein manufactures this expansion tank to OE-quality standards using materials selected for durability and consistent fit. The design focuses on matching original equipment expectations for the Audi A4 cooling system and supporting long-term service in normal operating conditions.