TYC 13845 Radiator

TYC Auxiliary Low Temp Radiator

TYC Radiator Part Number 13845 is an aluminum auxiliary low temperature radiator built for BMW cooling system applications that require precise thermal control. It is a crossflow radiator with spring lock inlet and outlet connections, sized for direct-fit service on select BMW 320i, 330i, 330e, M340i, M4, M440i, and related models.

The TYC Radiator line focuses on replacement cooling components engineered around OE-style fit and function. This TYC 13845 radiator follows the low temp radiator application used in BMW performance and hybrid cooling circuits, making it a practical choice for maintaining stable operating temperatures in the auxiliary cooling loop.

• Aluminum core construction for efficient heat transfer
• Auxiliary low temperature radiator application
• Crossflow design with 1-row core
• Spring lock inlet and outlet connections
• Core dimensions: 19.55 in. height, 24.17 in. length, 1.02 in. thickness
• 82 total tubes with 85 fins per 4 in. and 17 tubes per 4 in.
• Inlet and outlet diameter: 22.2 mm
• No engine oil cooler included
• No transmission oil cooler included

Detailed Application and Fitment

This radiator is used in BMW auxiliary cooling systems where the low temperature circuit supports engine thermal management. Fits 2021-2026 BMW 430i, Auxiliary; Fits 2021-2026 BMW 430i xDrive, Auxiliary; Fits 2020-2025 BMW 320i, Auxiliary; Fits 2020-2025 BMW 330e, Auxiliary; Fits 2021-2025 BMW 330i, Auxiliary; Fits 2021-2025 BMW 330i xDrive, Auxiliary; Fits 2021-2024 BMW 330e xDrive, Auxiliary; Fits 2021-2023 BMW M4, Auxiliary; Fits 2021-2023 BMW M440i, Auxiliary; Fits 2021-2023 BMW M440i xDrive, Auxiliary; Fits 2022 BMW 230i, Auxiliary; Fits 2022 BMW M240i xDrive, Auxiliary; Fits 2021-2022 BMW M3, Auxiliary; Fits 2020-2022 BMW M340i, Auxiliary; Fits 2020-2022 BMW M340i xDrive, Auxiliary; Fits 2019-2020 BMW 330i, N/A; Fits 2019-2020 BMW 330i xDrive, N/A.

Part Number 13845 cross-references BMW 17118666811 and Partslink BM3010193 for the same application.

What This Radiator Helps Address

• Auxiliary coolant temperature control issues
• Cracked, leaking, or corroded low temp radiator cores
• Restricted coolant flow in the BMW auxiliary cooling circuit
• Overheating concerns tied to a damaged secondary radiator
• Cooling system service needs on BMW 320i, 330i, 330e, M340i, M4, and related models

Installation Notes and Tips

Verify the spring lock inlet and outlet connection style, inlet and outlet diameter, and core dimensions before installation. This radiator is for the auxiliary low temperature circuit, so confirm the vehicle uses the matching BMW application and position listed above. Inspect hoses, seals, and mounting points during replacement to help prevent repeat leaks or fitment issues.

Quality Assurance

TYC Radiator Part Number 13845 is built as a replacement cooling component for the listed BMW applications, with aluminum construction and OE-style connection design for service fitment.