Motorad 1233-181 Engine Coolant Thermostat

Engine Coolant Thermostat Overview

Motorad 1233-181 is a standard engine coolant thermostat built to OEM specifications for precise temperature control. It uses OEM-quality materials and an OE-supplier manufacturing process to respond quickly to coolant temperature changes.

Key Features

• OEM design and grade for consistent cooling-system operation
• Brass and steel construction for durability in demanding service
• Starts to open at 181°F for controlled coolant flow
• Two-bolt design with a required gasket or seal
• Standard thermostat configuration for direct replacement service

Detailed Description

This Motorad thermostat is engineered for vehicles that require a standard 181-degree thermostat with OEM-style fit and function. The brass case and wax compound are used to deliver fast reaction to coolant temperature changes, helping the cooling system regulate engine temperature under normal and demanding driving conditions. Motorad 1233-181 is a practical replacement choice for Lexus NX300, Lexus NX300h, and Lexus NX200t applications that call for this thermostat specification.

The Standard product line focuses on OE-style replacement parts built to factory specifications. For buyers searching for a Lexus NX300 thermostat, Lexus NX300h coolant thermostat, or Lexus NX200t engine coolant thermostat, this part number provides a direct service option with the correct opening temperature and standard construction. Part number 1233-181 is also referenced as 1233-181 in catalog listings.

What It Is Used For

• Engine temperature running too cool or too warm
• Delayed coolant circulation after startup
• Cooling-system service on standard thermostat applications
• Replacement of a worn thermostat that no longer regulates flow correctly
• Restoring proper coolant temperature control in Lexus NX300, NX300h, and NX200t models

Installation Notes and Tips

Fits 2018-2021 Lexus NX300, N/A. Fits 2015-2021 Lexus NX300h, N/A. Fits 2015-2017 Lexus NX200t, N/A. A gasket or seal is required and is not included. Verify the thermostat housing condition and confirm the cooling system is fully drained before installation. Match the opening temperature and thermostat style to the original application before service.

Quality Assurance

Manufactured by an OE supplier using OEM quality materials and processes, this thermostat is built to meet factory-level specifications for cooling-system service.