Four Seasons 89099 Engine Auxiliary Water Pump

Engine Auxiliary Water Pump Overview

The Four Seasons 89099 is a new electric coolant pump for Mercedes-Benz applications that use heated windshield washers. Built with a plastic housing and 2-terminal-pin electrical connection, it supports coolant circulation in the auxiliary cooling circuit for models such as the Mercedes-Benz C300, C350, E550, and SL550. Four Seasons backs this Coolant Pump line with more than 50 years of mobile A/C experience and a focus on long-term, trouble-free operation.

Key Features

• Electric engine auxiliary water pump for coolant circulation
• Plastic housing and plastic construction
• 2-terminal-pin electrical connector
• Inlet diameter: 0.72 in. (18.30 mm)
• Outlet diameter: 0.73 in. (18.54 mm)
• Overall dimensions: 3.32 in. depth, 4.4 in. height, 3.05 in. width
• New replacement part, not remanufactured
• Four Seasons part number 89099

Product Details

Four Seasons 89099 is an electric auxiliary coolant pump used in Mercedes-Benz systems equipped with heated windshield washers. It is built as a direct-style replacement for the auxiliary pump application and is listed across multiple Mercedes-Benz platforms, including C-Class, E-Class, GLK-Class, SL-Class, and SLK-Class models. This part cross-references Gates 41557E for the same application. The Four Seasons Coolant Pump line is engineered and tested for dependable operation, and part number 89099 is also referenced by Dayco 89099 and Nissens 831378.

What It Helps Address

• Weak or inconsistent coolant circulation in the auxiliary cooling circuit
• Fault codes related to electric coolant pump performance
• Overheating concerns tied to auxiliary pump failure
• Poor operation of heated windshield washer systems that rely on coolant flow
• Noisy, worn, or inoperative auxiliary water pump assemblies

Installation Notes and Fitment

Compatible With Mercedes-Benz applications listed below. Verify connector style, inlet and outlet dimensions, and heated windshield washer equipment before installation. Fits 2008-2014 Mercedes-Benz C300, N/A; Fits 2008-2015 Mercedes-Benz C350, N/A; Fits 2008-2015 Mercedes-Benz C63 AMG, N/A; Fits 2015 Mercedes-Benz C63 AMG S, N/A; Fits 2010-2017 Mercedes-Benz E550, N/A; Fits 2010-2015 Mercedes-Benz GLK350, N/A; Fits 2013-2015 Mercedes-Benz GLK250, N/A; Fits 2012-2015 Mercedes-Benz C250, N/A; Fits 2012-2016 Mercedes-Benz SLK350, N/A; Fits 2012-2016 Mercedes-Benz SLK55 AMG, N/A; Fits 2013-2015 Mercedes-Benz SL550, N/A; Fits 2013-2019 Mercedes-Benz SL63 AMG, N/A; Fits 2015-2016 Mercedes-Benz SL400, N/A; Fits 2017-2020 Mercedes-Benz SL450, N/A; Fits 2017-2020 Mercedes-Benz SLC43 AMG, N/A.

Quality Assurance

Four Seasons engineers and tests this coolant pump for reliable service life, drawing on more than 50 years of mobile A/C experience. The 89099 is a new part built for consistent fit and function in the specified Mercedes-Benz applications.