Nissens 637659 Radiator

Nissens Radiator 637659 for Smart Cooling

The Nissens 637659 radiator is an aluminum replacement radiator built for primary engine cooling in select Smart applications. It is listed for Smart Fortwo and Smart Forfour models without an oil cooler, with fitment covering 2014-2018 vehicles depending on model.

Key Features

• Aluminum radiator construction for thermal transfer and corrosion resistance
• Core dimensions: 15.6299 in. height, 18.8976 in. width, 0.6299 in. length
• Direct-fit application for Smart Fortwo and Smart Forfour cooling systems
• Configured for vehicles without an oil cooler
• OE-style replacement part number 637659 for service and repair use

Detailed Description

Nissens 637659 is a radiator for primary engine cooling engineered for Smart Fortwo and Smart Forfour fitments. The aluminum core supports efficient heat exchange in compact cooling packages, making it a practical replacement when the original radiator shows signs of leakage, restricted flow, or reduced cooling performance. This part cross-references Bosch 13752 for the same application. For buyers searching for a Smart Fortwo radiator or Smart Forfour radiator without oil cooler, part number 637659 provides a direct reference point for the correct cooling-system match.

Vehicle Fitment

• Fits 2016-2018 Smart Forfour, N/A, without oil cooler
• Fits 2018 Smart Fortwo, N/A, without oil cooler
• Fits 2014-2015 Smart Fortwo, N/A, without oil cooler
• Fits 2016-2017 Smart Fortwo, N/A, Radiator for primary engine cooling

What It Helps Address

• Coolant leaks from a damaged or corroded radiator core
• Engine temperature rise caused by restricted heat dissipation
• Cooling-system inefficiency in Smart Fortwo and Smart Forfour applications
• Replacement needs after radiator tank or core failure
• Service repairs on vehicles without an oil cooler

Installation Notes and Tips

Confirm the vehicle’s cooling-system configuration before ordering, especially the absence of an oil cooler. Match the radiator to the listed Smart Fortwo and Smart Forfour year ranges and verify core dimensions and connection points against the removed unit. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant specification after installation.

Quality Assurance

Nissens develops and manufactures thermal and engine-efficiency components to consistent quality standards, with ongoing product development to support changing aftermarket requirements. Part number 637659 is backed by Nissens’ Genuine Nissens Quality approach.