Nissens 70235 HVAC Heater Core - Front

Nissens 70235 HVAC Heater Core

The Nissens 70235 HVAC heater core is built for Audi applications that need reliable cabin heat and stable thermal performance. With an aluminum core and aluminum tanks, this heater core is engineered for efficient heat transfer in a compact OE-style layout.

Compatible with select Audi A6, A6 Quattro, A7 Quattro, A8 Quattro, RS7, S6, S7, and S8 models, Nissens 70235 supports direct replacement needs for vehicles using the referenced factory-style heater core design.

Key Features

• Aluminum core material for efficient heat exchange
• Aluminum tank construction for consistent thermal performance
• Brazed cooling fins for durable heat transfer construction
• Core dimensions: 5.2800 in. height, 10.9800 in. length, 1.0200 in. width
• Pipe included: No
• Cross-reference part number: 4H0898037

Detailed Description

Nissens 70235 is an HVAC heater core designed for Audi vehicles that require a precise-fit replacement in the heating system. The aluminum core and aluminum tank design helps maintain efficient coolant-to-air heat transfer, while the brazed cooling fins support a robust internal construction. Nissens develops thermal management components with a focus on OE-style fit and manufacturing consistency, making this heater core a practical choice for restoring cabin heat performance in the Audi A6, Audi A6 Quattro, Audi A7 Quattro, Audi A8 Quattro, Audi RS7, Audi S6, Audi S7, and Audi S8.

This part number, 70235, cross-references 4H0898037 for the same application.

What It Helps Address

• Weak or inconsistent cabin heat
• Coolant odor inside the vehicle from heater core leakage
• Reduced defrost performance caused by poor heater output
• Temperature imbalance between driver and passenger cabin zones
• Heating system performance loss from a restricted or damaged core

Installation Notes and Tips

Verify the vehicle’s heater core dimensions and OE reference before installation. Because pipe included is listed as No, confirm the existing pipe and connection setup on the vehicle before beginning the repair. Proper cooling system draining, flushing, and refill procedures should be followed to help protect the new heater core and the rest of the HVAC system.

Quality Assurance

Nissens is a thermal and engine efficiency component manufacturer known for developing aftermarket parts to consistent quality standards. The 70235 heater core is produced as part of that range with aluminum construction and brazed fin design for dependable service in the listed Audi applications.