Nissens 70512 HVAC Heater Core

Nissens 70512 HVAC Heater Core for BMW

The Nissens 70512 HVAC heater core is built for BMW heating system service where reliable cabin heat and stable coolant-to-air transfer matter. It uses an aluminum core with plastic tanks and mechanically jointed cooling fins for a durable, service-ready construction.

Compatible with select BMW 3 Series and 5 Series applications, including BMW 318i, 325i, 328i, and M3 models from the 1990s. This Nissens heater core, part number 70512, is a direct-fit replacement for vehicles that need accurate thermal performance in the HVAC system.

Key Features

• Aluminum core for efficient heat transfer
• Plastic tank construction
• Mechanically jointed cooling fins
• Core dimensions: 5.6700 in. H x 9.7600 in. L x 1.6500 in. W
• Pipe included: No
• OE-style replacement for BMW HVAC heater core service

Detailed Description

Nissens 70512 is an HVAC heater core designed for BMW heating system repair and restoration. The aluminum core and plastic tank design follow common OE-style construction, while the mechanically jointed cooling fins support consistent heat exchange inside the HVAC case. Nissens develops thermal components with a focus on manufacturing quality and ongoing aftermarket coverage, and this heater core reflects that approach in a compact, application-specific design. Part number 70512 is a practical choice for BMW 318i, 325i, 328i, and M3 heater core replacement work.

This part cross-references Remy 99202 for the same application.

What It Helps Address

• Weak or uneven cabin heat
• Coolant seepage from a failing heater core
• Restricted heat output from internal blockage
• HVAC performance loss caused by aging core materials
• Replacement needs during BMW 3 Series and 5 Series heater system repair

Installation Notes and Tips

Verify the vehicle’s year, model, and HVAC configuration before installation. Compare the original core dimensions and pipe layout to Nissens 70512, since pipes are not included. Inspect the heater hoses, seals, and surrounding HVAC case components during service to reduce repeat labor. This heater core fits select BMW 318ti, 323i, 323is, 328i, 328is, M3, 318i, 318is, 325i, 325is, 528i, and 540i applications listed below.

• Fits 1997-1999 BMW 318ti, N/A
• Fits 1999 BMW 323i, N/A, Convertible
• Fits 1998-1999 BMW 323is, N/A
• Fits 1999 BMW 328i, N/A, Convertible
• Fits 1996-1999 BMW 328is, N/A
• Fits 1995-1999 BMW M3, N/A
• Fits 1993-1998 BMW 318i, N/A
• Fits 1998 BMW 323i, N/A
• Fits 1996-1998 BMW 328i, N/A
• Fits 1992-1997 BMW 318is, N/A
• Fits 1997 BMW 528i, N/A, To 03/1996
• Fits 1997 BMW 540i, N/A, To 03/1996
• Fits 1992-1995 BMW 325i, N/A
• Fits 1992-1995 BMW 325is, N/A
• Fits 1992 BMW 318i, N/A, Convertible

Quality Assurance

Nissens is a recognized aftermarket manufacturer of thermal management components, and this heater core is produced to support dependable BMW HVAC service. Part number 70512 is built to the same application standards expected for replacement heater core work in select BMW models.