Nissens 70514 HVAC Heater Core

Nissens 70514 HVAC Heater Core for BMW

The Nissens 70514 HVAC heater core is a direct-fit thermal component for select BMW applications, built with aluminum core and tank construction for efficient heat transfer. Its brazed cooling fins support consistent cabin heat output in demanding daily driving conditions.

Key Features

• Aluminum core material for effective heat exchange
• Aluminum tank material for a lightweight, corrosion-resistant design
• Brazed cooling fins for durable thermal performance
• Core dimensions: 5.3100 in. height, 8.1900 in. length, 1.2600 in. width
• Pipe included: No
• Fits BMW X3, 2004-2010; BMW 325Ci, 2001-2006; BMW 330Ci, 2001-2006; BMW M3, 2001-2006; BMW 325i, 2001-2005; BMW 325xi, 2001-2005; BMW 330i, 2001-2005; BMW 330xi, 2001-2005; BMW 323Ci, 2000; BMW 323i, 2000 and 1999 sedan; BMW 328Ci, 2000; BMW 328i, 2000 and 1999 sedan

Detailed Description

Built by Nissens, part number 70514, this HVAC heater core is engineered for BMW heating systems that require a compact aluminum heat exchanger. The brazed fin construction helps transfer heat efficiently from engine coolant to the cabin air stream, supporting steady defrost and interior comfort. This part cross-references Spectra Premium 98067 and OSC 98066 for the same application.

What It Helps Solve

• Weak or uneven cabin heat
• Cool air from the vents when the heater is on
• Restricted heat transfer caused by a failing heater core
• Coolant odor or moisture related to heater core leakage
• Defrost performance issues in BMW X3 and 3 Series models

Installation Notes and Tips

Verify the vehicle’s heater core dimensions and hose routing before installation. This Nissens 70514 heater core does not include pipes, so reuse or source the correct external connections as required by the vehicle. Proper coolant system bleeding is important after replacement to help prevent air pockets and restore normal heater operation.

Quality Assurance

Nissens develops and manufactures thermal management components to consistent quality standards, with product engineering focused on aftermarket fit and performance. The 70514 heater core reflects that approach with aluminum construction and brazed cooling fins for dependable service in compatible BMW heating systems.