Rein WPA0033 Engine Auxiliary Water Pump - Rear

OE Quality Auxiliary Water Pump

Rein WPA0033 is an OE quality auxiliary water pump for select Audi and Volkswagen applications. It is built from original casting specifications to support proper fit, steady coolant flow, and consistent engine cooling in the vehicles listed below.

Compatible with Audi R8 rear applications and multiple front-of-engine Audi A4, A6, S4, Allroad Quattro, and Volkswagen Passat configurations, this auxiliary water pump is a direct-fit service part for cooling system repair. Rein WPA0033 is also a practical replacement when matching OE flow rates and factory-style construction matter.

Key Features

• High-quality plastic or metal construction for durability
• Flow rates matched to OE specifications
• Fabricated from original casting specifications for proper fit
• Includes vibration isolators, mounting brackets, and hardware where applicable
• Plastic impeller material
• Rein WPA0033 auxiliary water pump for select Audi and Volkswagen cooling systems

Detailed Description

Rein WPA0033 is engineered as an OE quality auxiliary water pump for vehicles that rely on supplemental coolant circulation. The housing is produced to original casting dimensions, helping the pump align correctly during installation and maintain the coolant movement expected from the factory design. This makes it a strong choice for Audi A4, A6, S4, Allroad Quattro, R8, and Volkswagen Passat cooling system service.

This part cross-references 078121599J and 078121601 for the same application.

What It Helps Address

• Weak or inconsistent auxiliary coolant circulation
• Cooling system noise related to worn pump components
• Fitment issues from non-OE-style replacement parts
• Reduced coolant flow in front-of-engine or rear-mounted auxiliary pump applications
• Service replacement for a failing Rein WPA0033 unit

Installation Notes

Verify the vehicle’s year, make, model, and pump position before installation. Confirm the application details for Audi A4, A6, S4, Allroad Quattro, R8, and Volkswagen Passat models, including front-of-engine and rear configurations where listed. Inspect the cooling system, electrical connections, and mounting points before replacing the pump, and follow factory service procedures for coolant refill and bleeding.

Quality Assurance

Rein Automotive OE quality auxiliary water pumps are built to support professional repair standards with factory-style fit and flow characteristics. WPA0033 carries a 24-month, 24,000-mile warranty.