Rein EPT0153 Engine Coolant Reservoir

OE-Quality Expansion Tank for Audi and Porsche

The Rein EPT0153 engine coolant reservoir is an OE-quality expansion tank built for direct replacement on select Audi and Porsche applications. It is produced from virgin plastic to help resist heat-cycle cracking and maintain reliable coolant system performance over time.

Key Features

• Virgin plastic construction meets or exceeds OE material specifications
• Resists cracking and wear from repeated heat cycles to help prevent coolant loss
• Direct-fit design supports straightforward installation
• Built to strict engineering standards for material quality and dimensional accuracy
• Gray finish

Detailed Product Overview

Rein EPT0153 is an OE-style expansion tank designed for vehicles that demand precise fitment and dependable cooling system operation. This engine coolant reservoir is engineered to match original equipment materials and tolerances, making it a practical replacement for worn, brittle, or leaking tanks on Audi A4, Audi A4 Quattro, Audi A4 allroad, Audi A5, Audi A5 Quattro, Audi allroad, Audi Q5, and Porsche Macan applications. The part number EPT0153 is also referenced in cross-application listings for the same vehicle coverage.

This part cross-references URO 8K0121403Q for the same application.

Common Cooling System Issues It Can Address

• Coolant leaks from a cracked or aging reservoir
• Loss of coolant caused by heat-cycle damage
• Visible plastic brittleness or discoloration in the expansion tank
• Low coolant warnings related to reservoir failure
• Fitment problems from an incorrect replacement tank

Installation Notes and Tips

Verify the reservoir shape, hose connections, and mounting points against the original tank before installation. Because this is an application-specific part, confirm vehicle coverage for your exact Audi or Porsche model year before ordering. Transfer any reusable sensors, caps, or fittings from the original unit only if they are in serviceable condition and match the replacement design.

Quality Assurance

Rein manufactures this expansion tank to OE-quality material and tolerance standards, using virgin plastic rather than regrind to improve durability and reduce the risk of cracking from repeated thermal cycling. The Rein EPT0153 is built for long service life in the cooling system.

Compatible Vehicles

• Fits 2017-2018 Porsche Macan, N/A
• Fits 2010-2017 Audi A5 Quattro, N/A
• Fits 2011-2017 Audi Q5, N/A
• Fits 2009-2016 Audi A4, N/A
• Fits 2013-2016 Audi A4 allroad, N/A
• Fits 2009-2016 Audi A4 Quattro, N/A
• Fits 2013-2016 Audi allroad, N/A
• Fits 2010-2014 Audi A5, N/A