Four Seasons 89091 Engine Auxiliary Water Pump

Four Seasons 89091 Engine Auxiliary Water Pump

Four Seasons 89091 is an electric engine auxiliary water pump built for coolant circulation in select Audi applications. It uses a plastic housing and a 2-pin terminal design, with inlet and outlet diameters sized for the specified cooling system connection points.

Backed by Four Seasons’ long history in mobile A/C and thermal management, the Coolant Pump line focuses on replacement parts that are engineered and tested for dependable operation. This Four Seasons 89091 pump is a new unit intended for direct replacement in vehicles such as the Audi A4, Audi A4 Quattro, Audi A5, Audi A5 Quattro, and Audi Q5.

Key Features

• Electric engine auxiliary water pump for coolant circulation
• Plastic housing and plastic construction
• 2-terminal pin electrical connection
• Inlet diameter: 0.78 in. (19.81 mm)
• Outlet diameter: 0.79 in. (20.11 mm)
• Overall dimensions: 3.35 in. depth, 4.27 in. height, 1.90 in. width
• New replacement part
• Compatible With select 2009-2012 Audi A4 and A4 Quattro, 2010-2011 Audi A5 and A5 Quattro, and 2011-2012 Audi Q5 coolant pump applications

Product Details

The Four Seasons Coolant Pump 89091 is an electric auxiliary pump used in engine cooling systems where controlled coolant flow is required. Its compact plastic housing, 2-pin terminal layout, and specified inlet and outlet sizes support fitment in the listed Audi models. This part cross-references Gates 41553E for the same application.

Use Four Seasons 89091 when replacing a worn or failed auxiliary coolant pump on a compatible Audi A4, Audi A4 Quattro, Audi A5, Audi A5 Quattro, or Audi Q5. The part number 89091 is also referenced across multiple interchange listings, making it easier to verify the correct replacement before ordering.

Common Issues This Pump Can Address

• Loss of auxiliary coolant circulation
• Cooling system fault codes related to pump operation
• Overheating concerns tied to reduced coolant flow
• Noise or intermittent operation from a failing electric pump
• Leakage from a deteriorated pump housing or connection area

Installation Notes

Confirm the vehicle’s year, model, and cooling system configuration before installation. Match the inlet and outlet diameters, terminal count, and electric pump style to the original unit. Inspect hoses, connectors, and surrounding cooling system components for wear or contamination before installing the replacement pump.

Fits 2009-2012 Audi A4, N/A, coolant pump. Fits 2009-2012 Audi A4 Quattro, N/A, coolant pump. Fits 2010-2011 Audi A5, N/A, coolant pump. Fits 2010-2011 Audi A5 Quattro, N/A, coolant pump. Fits 2011-2012 Audi Q5, N/A, coolant pump.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation. With more than 50 years of mobile A/C experience behind the brand, the Coolant Pump line is built to support accurate replacement selection and dependable thermal system performance.